Opening width rear door/tailgate Opening height rear door/tailgate Loading height Opening width sliding door Luggage compartment length Luggage compartment width (Shuttle) Luggage compartment width (Life) 1,181 mm 1,116 mm up to 1,238 mm 700 mm up to 1,354 mm 1,170 to 1,340 mm 1,120 to 1,340 mm

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The pictures show the Caddy Shuttle with tailgate. It can also be equipped with optional wing doors.
Luggage compartment volume
Colour partial volume Name Volume Sum of partial volume Caddy Shuttle Volume, closed luggage compartment, behind 1st seat row in passenger compartment Volume, open luggage compartment, behind 1st seat row in passenger compartment Volume, open luggage compartment, behind front seats with tipped 1st seat row up to 626 l Caddy Life up to 560 l

up to 1,266 l

up to 1,200 l

up to 2,305 l

up to 2,239 l

Overview of doors

with tailgate with rear wing doors with rear wing doors and ladder flap

Without sliding door

Sliding doors on both sides

Left-hand sliding door

Right-hand sliding door

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The 2004 Caddy comes in a wide range of versions. The variable equipment with sliding doors, rear wing doors, tailgates or a ladder flap.
The picture shows the complete Caddy range. The assignment of left-hand and righthand drive vehicles can be found in the current sales literature. The ladder flap will be available later on.

Body in white

A sturdy body in white has a decisive influence on the stability and thus also on the driving safety of a vehicle. This particularly important for vehicles that are mainly used as fast commercial vehicles. The driving comfort also benefits from a good body design. That is a plus for the Caddy Shuttle and the Caddy Life when used as a family and leisure vehicle.
The 2004 Caddy has a torsionally stiff and low weight two-shell body structure (inside/outside body shell). The following structural features can be distinguished in terms of function: Floor pan with frame structure, with tailored blanks at front (different sheet thicknesses, welded before shaping) inner body shell, with reinforcement elements, outer body shell, single-piece side section Roof reinforcements Use of different sheet qualities depending on the loading of the respective body areas Reinforcement and impact elements for improved occupant protection in the front doors
Longitudinal member - front
Floor pan - front with tailored blanks

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Floor - front
increasing sheet thickness Longitudinal member - front

Roof reinforcements

The pictures show the body in white of the Caddy Van.

Cross member Reinforcing element

Floor panel - rear

Floor panel - front

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Side section (one-piece)

Sheet qualities

Mounted parts
Normal-strength sheet Higher strength sheets High-strength sheets
Doors Side impact elements

Wing doors

The Van version of the 2004 Caddy comes with glazed wing doors split in the ratio 2/3 to 1/3. The windows in the wing doors can be covered with an optional dark opaque film. The Caddy Shuttle/ Caddy Life can be optionally fitted with the wing doors.
Inside handle Locking lever

Outside handle

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The left-hand wing door needs to be opened first. The outside handle on the left-hand door is integrated in the number plate light fitting. The locking level built into the bottom of the right-hand door can then be used to open the right-hand wing door. Wing doors lock at a 90 angle when opened. If the door latches are detached, the wing doors will open to approx. 170 due to a stop in the hinge.

Tailgate

The Caddy Shuttle and Caddy Life come with a tailgate with rear window as standard. The Caddy Van can also be fitted with a tailgate. The tailgate can be opened with an outside handle. A draw loop is provided to help pull it down.

Draw loop

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Sliding door
The 2004 Caddy is equipped with a sliding door reaching up to the roof on the passenger side. The drivers side can also be fitted with an optional sliding door. The sliding door opens to a maximum width of 70 cm. Only the Caddy Van with a glazed load compartment can be equipped with a sliding door. The Caddy Shuttle and Caddy Life have sliding doors a with windows.

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Protection of the tank filler flap
The tank filler flap is located on the drivers side just in front of the D-pillar. To ensure that it is not damaged when the door is slid backwards, the 2004 Caddy has a locking unit when equipped with a sliding door on the left-hand side.

Storage in drivers door

Bulkhead Jack and tool set, mounted without cover

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Lashing rings on floor
Caddy Shuttle/Caddy Life The Shuttle version of the 2004 Caddy comes in the equipment derivatives Caddy Shuttle as the Basic version and Caddy Life as the Comfort version. In the Caddy Shuttle, the floor of the passenger compartment is fitted with carpet (Dilours) as standard. Four lashing rings on the floor allow safe anchoring of loads. The side panels of the passenger compartment are made from varnished hardboard. They do not have storage compartments. The ceiling is is also lined with varnished hardboard. There are two storage compartments with removable lids in the footwell in front of the first row of seats in the passenger compartment. The jack and tool set are mounted on the side wall without a cover. The picture shows a Caddy Life.
The Caddy Life has additional features compared with the Caddy Shuttle. The side panels are moulded sections with integrated storage bins. Attachment rings are mounted above the windows for an optional net partition. A further option is storage nets with hooks for hanging items. The Caddy Life comes with a luggage area cover as standard (not shown here). The jack and tool set are stowed away behind a cover in the side panelling.

Compartment in floor

Hooks for net partition and storage net
Jack and tool set behind panel

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Sliding door storage
Storage between C and D-pillar
Dash panel The 2004 Caddy has an all-new dash panel. There are two versions that mainly differ in the centre console equipment.
Centre console type with open storage cup holders ashtray in passenger compartment Fitted as standard in the Caddy Van and Caddy Shuttle.
Centre console type with Compartment for a CD changer under the armrest lid Air-conditioning vents fold-out cup holder 12 V socket This centre console is longer and comes as standard in the Caddy Life and is an option in the Caddy Shuttle.
Centre console (Caddy Shuttle/Life)
Cup holder Armrest with storage compartment Socket 12 V

Storage Cup holder

Centre console (Caddy Van/Shuttle)

Storage

Further differences between the console types are the materials used and the resulting material feel.

Ashtray

2 x 2 cup holders
Left-hand storage compartment on top of dash panel (Caddy Van and Caddy Shuttle)
Left-hand storage compartment on top of dash panel - with lid and document holder (Caddy Life)
Right-hand storage compartment on top of dash panel -without lid

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Ashtray and cigarette lighter
Storage compartment on passenger side containing key switch for front passenger airbag

Key switch for front passenger airbag
The driver and front passenger seats in the 2004 Caddy are individual seats. The first row of seats in the Caddy Shuttle/Life is a 3-seat bench split 1/3-2/3. An optional double bench can be fitted in the second row.
Seats (example Caddy - 7-seater)
2nd seat row in passenger compartment Head restraints Handle for folding seat Individual seats driver/front passenger 1st seat row in passenger compartment

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Side airbag
The adjustment of the seats is described in detail in the operating manual.
Adjustment of backrest tilt Height adjustment

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The picture shows a vehicle fitted with all available seats (Shuttle/Life version with drawer). The drawer is always combined with the height adjuster in the Caddy Shuttle/ Life and vice versa.

Longitudinal adjustment

Drawer/storage
Features on drivers seat and front passenger seat Longitudinal adjustment Adjustable backrest tilt Head restraint height adjustable Side airbag (optional) Individually adjusted heated seats (optional) Storage under seat (optional) Head restraint height and tilt adjustable Drawer under seat (optional) Seat height adjustable Backrest folds forward (when there is only one sliding door, always on the opposite side of the vehicle)

Caddy Shuttle

Caddy Life
Seats in passenger compartment The three-seat bench in the first seat row of the passenger compartment is split into a 1/3 seat and a 2/3 seat. The bench is permanently screwed to the floor and cannot be removed. The backrests of each seat section can be folded forward separately and lock into a horizontal position. If the seat section fastenings on the vehicle floor are unlocked, you can fold the folded seats forwards again, i.e. tip them. This can be done without removing the head restraints. Gas-filled springs make tipping the seats easy. The seat sections can be secured in position with folding struts so that they do not move on the road.
1st row of seats in passenger compartment individual seat tipped
Loop for releasing backrest

Floor latch

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1st row of seats in passenger compartment tipped completely

Strut Strut

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Screw fastening 2nd row of seats in passenger compartment folded

Gas-filled struts

The double seat bench for the second row of seats is fixed to the floor with 4 bolts. The top left loop is used to unlock the backrest, which can then be folded forward. Pulling the two bottom loops releases the fastening of the seat bench to the vehicle floor so you can take the seat out from the rear of the vehicle.

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Loop for folding
Loop for unlocking on vehicle floor

Occupant protection

The 2004 Caddy is equipped with the proven occupant protection systems, the airbag system, the belt system and a child restraint system (Isofix) depending on the vehicle version. The complete airbag system includes: Driver airbag Front passenger airbag single-stage* Front side airbags* * Optional for Caddy Van

BGU 4-cylinder in-line engine 1,595 cm3 81.0 mm 77.4 mm 2 Torque (Nm) 10.3 : kW at 5,600 rpm 148 Nm at 3,800 rpm Simos 7.1 Super unleaded RON 95 (normal unleaded at RON 91 with reduction in performance) Exhaust gas recirculation, catalytic converter, Lambda control EU4/EOBD Engine speed (rpm) Power (kW)

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Exhaust gas treatment Emissions standard

1.9l/77 kW TDI engine

The 1.9l/77 kW TDI engine has already proven itself in the Golf and now features in the 2004 Caddy. Technical features Diesel engine with exhaust-gas turbocharger Unit injector system Overhead camshaft EDC 16 engine management Electronic power control with contact-free sensors Exhaust gas recirculation Electrical intake manifold flap

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Engine code Type Displacement Bore Stroke Valves per cylinder Compression ratio Maximum output Maximum torque Engine management Fuel Exhaust gas treatment
BJB 4-cylinder in-line engine 1,896 cm3 79.5 mm Power (kW)

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95.5 mm : kW at 4,000 rpm 250 Nm at 1,900 rpm EDC 16 Diesel min. 51 CN Exhaust gas recirculation and oxidation catalytic converter EU3

Torque (Nm)

Engine speed (rpm)

2.0l/51 kW SDI engine

The 2.0l/51 kW SDI engine with unit injector technology is a further development of the 1.9l/ 74 kW TDI engine used in the Touran. Technical features Naturally aspirated diesel engine Unit injector system Overhead camshaft EDC 16 engine management Electronic power control with contact-free sensors Exhaust gas recirculation Electrical intake manifold flap

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BDJ 4-cylinder in-line engine 1,968 cm3 81.0 mm Torque (Nm) 95.5 mm : kW at 4,200 rpm 140 Nm at 2,200 2,400 rpm EDC 16 Diesel min. 51 CN Exhaust gas recirculation and oxidation catalytic converter EU3 Engine speed (rpm)

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Power (kW)

Transmission

Gearbox
Two mechanical manual gearboxes conceived for transverse installation feature in the 2004 Caddy. The gearboxes are based on the proven group manual gearboxes. They have been further developed with the following changes. Changes: Shaft spacing increased Axle drive reinforced Gearbox and clutch housing adapted Without sender for driving speed

5-speed gearbox 0AH

5-speed gearbox 0A4

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The gearbox is a further development of the 02T manual gearbox, as already used in the Polo, for example. The gearbox has 5 gears and can transmit torques of up to 200 Nm. It is used with the petrol engines and the SDI engine.
The gearbox is a further development of the 02J manual gearbox. The construction has been specially reinforced for the greater torque to be transferred and is already used in the 2004 Golf. The gearbox has 5 gears and can transmit torques of up to 250 Nm. It is used with the TDI engine.
Both gearboxes do not have a sender wheel for the speed. The speed signal is transmitted by the ABS system.

Engine-gearbox combinations

Engine

5-speed manual gearbox 0AH
5-speed manual gearbox 0A4
1.4l/55 kW petrol engine BCA
1.6l/75 kW petrol engine BGU
1.9l/77 kW TDI engine BJB
2.0l/51 kW SDI engine BDJ

Chassis

Front axle
The 2004 Caddy has an optimised McPherson front axle with lower wishbones and MacPherson struts. The axle is basically the same as the front axle on the 2004 Golf and provides optimum comfort with good driving dynamics. The standing height has been increased especially for use in the 2004 Caddy.
Technical features are: Aluminium assembly carrier Wishbones Decoupled spring and damper connection by rubber/metal bearings for the struts 3rd generation wheel bearings Active speed sensor, the sender wheel is integrated in the wheel bearing seal. Anti-roll bar with 1 : 1 connection. The anti-roll bar is connected directly to the strut via a coupling rod and thus ensures good stability. Opening at front in subframe for gearbox pendulum support

Coupling rod

Assembly carrier (console) Anti-roll bar Strut bearing

Wheel bearing housing

Wheel bearing Wishbone
Assembly carrier (subframe) Gearbox pendulum support

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Assembly carrier

Left console

The assembly carrier holds the traverse link, antiroll bar and steering rack. It is made up of three parts and has a central subframe to which consoles are connected on the left and right. The components of the assembly carrier are made from aluminium. The assembly carrier is bolted rigidly to the body at six points. This stiffens the front section of the body. This connection and the optimum configuration of the rubber/metal bearings in the traverse link and the strut bearing allow good driving dynamics and body acoustics.

Right console

Subframe

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Connection to body

Subframe Left console

Bolt for fastening to body

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Strut bearing The strut bearing is a rubber/metal bearing. The connection of the springs and the damper to the body are uncoupled from each other. The spring force is thus channelled separately into the body and tensioning of the damper bearing is avoided. This improves the ride comfort and reduces the noise transmission from the road to the body. The bearing has a smooth characteristic curve in the direction of travel. This improves the driving comfort and vehicle acoustics. The bearing is stiff in the transverse direction. This has a positive effect on the driving dynamics and the steering response.

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Electric motor with control unit
Assembly carrier (subframe)

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Function The electromechanical power steering is an active system. It operates in relation to the driving speed, steering moment and steering speed, steering angle and return forces. The assist power of the electric motor flanged on parallel to the rack and pinion is transferred to the rack via a second pinion (input pinion). This pinion meshes in the steering rack and transfers the assist power.
It therefore provides optimum steering assistance for the driver.
Sender for steering moment

Control unit

Electric motor Steering pinion

Steering column

Rack Input pinion
Sender for steering angle

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You will find detailed information in the self-study program 317 The Electromechanical Power Steering with Dual Pinion.
The steering column is mechanically height and length adjusted. For optimum adaptation to the needs of the driver, the height can be adjusted by 40 mm and the length by 50 mm. Moving the adjustment lever, releases and locks the plate clamp for height and reach adjustment of the steering column.
The steering column is connected to the dash panel module carrier with a mounting made from diecast aluminium. The mounting is screwed to the steering column console.

Console Adjusting lever

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Mounting Adjusting lever Universal joint

Universal joint shaft

Universal joint

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Multi-plate package for height/reach adjustment
As part of occupant protection, the steering column and universal joint shaft are designed to slide inside each other. This means the steering column and steering wheel cannot be pushed towards the driver when the front section of the car is deformed in a collision.

Brakes

ABS system The MK70 ABS system from Conti Teves is used as standard in the 2004 Caddy. It has the following technical features: Anti-lock brake system (ABS) with electronic brake pressure distribution (EBD). The traction control system (TCS) and engine braking control (EBC) are controlled by the engine management.

ABS or ESP unit

Brake servo

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MK70 system Hydraulic unit
ESP system The MK60 system from Conti Teves with integrated pressure sensor is optionally available as an ESP system for the Caddy Shuttle/Caddy Life from 75 kW. Compared with the MK70 system, it has the following additional technical features: Electronic Stabilisation Program (ESP) with ESP button and ESP warning lamp Hydraulic brake assist (BA) Traction control system (TCS)

Permanent magnet Push rod
Sender for clutch position G476

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Pedal travel
Senders for accelerator pedal position G79 and G185 The senders for the accelerator position work according to the induction principle. When the accelerator pedal is pressed, the angle movement is converted into straight-line movement to move a small metal plate back and forth. Evaluation electronics evaluate this movement and send a corresponding signal to the engine control unit depending on the accelerator pedal position. The engine control unit then calculates the injection amount from this data.

Metal plate

Cover for circuit board

Evaluation electronics

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You will find detailed information on the design and function of the contact-free senders in the self-study programmes 316 The 2.0l TDI Engine or 321 The Golf 2004 Running Gear.

Electrical system

Locations of onboard supply components
Battery The battery is located at the front left of the engine compartment. E-box The fuses and relays for the electrical components in the engine compartment are accommodated in the E-box. Relay carrier The relay carrier holds additional relays. The configuration depends on the vehicle equipment. Relay carrier on onboard supply control unit The following relays are located in the relay carrier on the onboard supply control unit: Relay 2 for voltage supply terminal 30 - J689 Relay for heated rear window J9 Horn relay J413 Relay 1 for double washer pump J729 Relay 2 for double washer pump J730 X contact relief relay J59 Fuse box The fuses for the electrical components in the vehicle are in the fuse box. Pre-fuse box The pre-fuse box is on the front side of the E-box. It is part of the E-box and holds the fuses for the alternator and the electromechanical power steering.
Battery on left of engine compartment
Fuse and relay box on left of engine compartment
Relay carrier on left under dash panel

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Relay carrier on control unit for onboard supply, on left under dash panel
Fuse box on left under dash panel Pre-fuse box on left of engine compartment

Networking concept

Overview of network To enable data exchange between the control units, they are networked via different data bus systems. The diagnostic interface for data bus J533 (Gateway) forms the interface for the following data buses: Drivetrain CAN data bus Convenience CAN data bus Infotainment CAN data bus Combi-instrument CAN data bus (dash panel insert) Diagnostics CAN data bus

Electrical load management The electrical load management ensures that the battery has sufficient electrical energy to start the engine. Electrical convenience consumers are switched off for this purpose. The technical safety is maintained. The onboard supply control unit evaluates the engine speed, the battery voltage and the alternator load via the DF signal (Dynamo Field) when switching off. The onboard supply control unit evaluates the onboard supply load using this information and the information on active high-power consumers with a short active period. The onboard supply control unit can request a higher engine speed from the engine control unit on the basis of this information. Furthermore convenience consumers can be switched off. Three different operating modes are recognised for load management: uncritical critical very critical

U Battery uncritical

Management not active
Load management Cancel idle speed increase

13.8 V

12.7 V
Charge time (30 s) fulfilled (DF < 70 % ) If the battery voltage is below 12.7 V for longer than 10 s

critical

Request idle speed increase
Switch on consumers acc. to priority list

12.2 V

Waiting time (120 s) met (or DF < 70 %)

very critical

If the battery voltage is below 12.2 V for longer than 30 s
Switch off consumers acc. to priority list
Consumer switch-off Idle speed increase Management active

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Outside light control The onboard supply control unit evaluates the signals from the light switch directly. The information on switching on the turn signal, the main beam lights and use of the flasher lights is sent via the steering column electronics control unit J527 and the CAN convenience data bus.

Functional diagram

F4 J519 Terminal 15
Terminal RFL Terminal FL Terminal DDL Terminal 56 Terminal 58

E1 Terminal 30

Terminal 15

E4 E19 J527

CAN data bus convenience

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Legend D E1 E4 E19 F F4 J519 J527 Ignition switch terminal 15 Light switch Switch for headlight dipper and flasher Parking light switch Brake light switch Reversing light switch Onboard supply control unit Steering column electronics control unit Term. 56 Term. 58 Term. RFL Term. FL Term. DDL Driving lights Side lights Rear fog light Fog light Day driving light Function needs to be coded in the onboard supply control unit. The codes differ from country to country High level brake light bulb Number plate light

Bulb monitoring

The functioning of the bulbs is monitored constantly. They are monitored while switched off (cold monitoring) and switched on (hot monitoring).
Cold monitoring The individual bulbs are switched on four times in short intervals of 500 ms when the ignition is turned on. The current value allows the onboard supply control unit to detect a faulty bulb.

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Hot monitoring The individual bulbs are controlled by semiconductor modules located in the onboard supply control unit. They recognise whether there is overloading, a short circuit or an open circuit.

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Fault detection In both monitoring types, an entry is made in the fault memory and there is an indication in the dash panel insert when a fault is recognised. A new bulb is recognised by the monitoring system, the fault is deleted and the displayed indication cancelled.

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Turn signal control When you tap turn light E2 briefly once, the turn lights will flash three times. If you tap again, the turn lights will flash a further three times. This function is called lane-change flash.

First request

Renewed request
Request of the Flash function by tapping the turn signal switch

M5 or M7

Triggering of the turn signals by the onboard supply control unit

M6 or M8

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Legend E2 M5 M6 M7 M8 Turn signal switch Front left turn signal bulb Rear right turn signal bulb Front right turn signal bulb Rear right turn signal bulb
Front windscreen wiper system
Wiper control The wiper system uses one motor with a mechanical connection between the wipers. The operating rods for windscreen wiper switch E are transferred directly to the steering column electronics control unit J527 and then to the onboard supply control unit J519 via the CAN data bus convenience. The onboard supply control unit directs the information on the selected wiper setting via the LIN data bus to the wiper motor control unit J400 that regulates the wiping cycles. In intermittent mode, the wiper cycles are speed-related.

Overview of wiper system

J400 F266

J519 J527 J533

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Legend D E F266 J104 Ignition/start switch Windscreen wiper switch Bonnet contact switch ABS with EDL control unit J400 J519 J527 J533 Wiper motor control unit Onboard supply control unit Steering column electronics control unit Data bus diagnostic interface

Service and winter position If you move the windscreen wiper switch to the flick wiper position within 10 seconds after parking and turning off the ignition, the wipers will move to the top position. This function will not work when the bonnet is open.

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Anti-block function The wiper system can detect from the current consumption if the wipers jam. If there is an obstacle in the wiper path, the wiper system will attempt five times to push the obstacle away. If it cannot remove the obstacle, the wiper will stop in this position. The obstacle then needs to be removed by hand. The anti-block function covers the whole wiper path just up to the top position. If the wiper blade has frozen onto the bottom edge of the windscreen, this is also recognised as an obstacle and the wiper will attempt to free itself five times. After the fifth attempt it will stop.

Blockage

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Rest position after the first switch off
Rest position after the second switch off
Alternating rest position To avoid long-term deformation of the wiper blades, the wipers move up slightly every other time they are switched off. This changes the position of the wiper blade. In addition, the rest position can be changed again if you switch off the ignition again several times.

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Control unit with display in dash panel insert J285
The control unit with display manages all display elements, the analogue gauges and the warning lamps.
LED warning lamps Digital display

Dash panel insert

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Revolution counter Coolant temperature Fuel gauge

Speedometer

The display comes in the following different versions:
Lowline has the displays: Clock Odometer Trip recorder The Lowline version also comes as a simplified basic version without a coolant temperature gauge. A red LED illuminates when the coolant is too hot.
Midline has the following extras compared with the Lowline version: Outside temperature Multi-function display or Warning texts instead of multi-function display and outside temperature

Temperature sensor
Electrical connection Heat exchanger

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Combustion air intake

Fuel intake

Exhaust gas outlet
Venturi injector The intake air is guided via a ceramic housing in the shape of a Venturi injector. This leads to a knock-on effect that supports the fuel injection.

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Glow pencil fitting
Activating the Thermo Top V There are three possibilities for activating the Thermo Top V auxiliary coolant heating. The Heating or Ventilation functions can be set in the dash panel display. 1. The auxiliary coolant heating can be activated using the immediate heat button on the operating unit. 2. The auxiliary coolant heating can be programmed using the multi-function display (MFD). Programming is carried out via the dash panel display in the Auxiliary heating sub-item (customisation). 3. Using the separate remote start control for the auxiliary coolant heating: Switching on and off with the remote control (from distance of up to 600 m). The immediate heat button in the operating unit shows the status of the auxiliary coolant heating: The feedback LED is yellow while it is active. When a switch-on time has been programmed for the auxiliary coolant heating, the feedback LED is illuminated for approx. 10 seconds after the ignition is switched off.
For further information on auxiliary coolant heating systems, see self-study program 280 The Phaeton auxiliary heater Thermo TOP C and supplementary heater Thermo TOP Z.
Radio, telephone and navigation

Radio systems

Two different radios are available for the 2004 Caddy. Radio R 100 Technical features 2 loudspeaker channels (only at front, each 20 Watt) RDS FM/AM Europa radio Control for an external 6-CD changer Telephone control (hands free) GALA speed-dependent volume control Self-diagnosis incl. loudspeaker diagnosis Transport mode (reduction of the current requirement during transport and rest times)

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Radio RCD 300 Technical features 2 or 4 loudspeaker channels (each 20 Watt), the fader function is available when there are 4 channels RDS FM/AM Europa radio 2-tuner FM Diversity Integrated single CD drive Control for an external 6-CD changer Telephone control (hands free) GALA Self-diagnosis incl. loudspeaker diagnosis Transport mode (reduction of the current requirement during transport and rest times)

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RNS MFD-2 radio navigation system The 2004 Caddy can also be equipped with a radio featuring an integrated navigation system. Technical features Multi-colour display (MFD) Dynamic traffic guidance (avoiding jams) 2 or 4 loudspeaker channels (each 20 Watt) RDS FM/AM Europa radio Display of the stored stations with RDS names Control unit for aerial selection (external change-over box) Control for an external 6-CD changer Telephone control (hands free) GALA Traffic Information Memory (TIM) Self-diagnosis incl. loudspeaker diagnosis Display of navigation arrows and navigation information in dash panel insert (Highline)

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Diversity refers to the different aerial signals. The Diversity systems are used in the radio and radio-navigation systems to improve reception. At least two separate aerials are required for a Diversity system.

Radio aerials

The 2004 Caddy has different aerials fitted in the front windscreen depending on the equipment. Depending on the type of radio system, single aerials and Diversity aerials are used.

Single aerial

Housing

Aerial amplifier

The R 100 radio has a single aerial in the front windscreen and an aerial amplifier.

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Diversity aerials

R 100 radio

Two independent aerials (Diversity aerials) can reduce reception interference like noise and crackling, for example, in conjunction with the 2-tuner FM Diversity or the control unit for aerial selection (external change-over box). This interference occurs frequently in residential areas or mountainous regions due to reflection from houses and mountains. The reflection causes the signals to be delayed and leads to interference.
2-tuner FM Diversity system The RCD 300 radio has an integrated 2-tuner FM Diversity system with two internal receivers that process the incoming aerial signals separately and combine them to make a single signal.

Diversity aerial

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Radio RCD 300

Control unit for aerial selection
Aerial amplifier Diversity aerial
The J515 aerial selection control unit (external switch-over box) allows connection of the Diversity aerials to the RNS MFD-2 radio navigation unit. This monitors the incoming aerial signals on the external switch-over box and automatically switches to the aerial with the stronger signal.

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Control signal Control unit for aerial selection Aerial signal RNS MFD-2 radio navigation system
Telephone/navigation aerial
The 2004 Caddy can also be optionally equipped with an additional telephone/navigation aerial. The aerial is used in conjunction with the following optional components: RNS MFD-2 radio navigation system Telephone/preparation for telephone* Remote control for auxiliary coolant heating*
* When the vehicle is equipped with a telephone/preparation for telephone and auxiliary coolant heating with remote control, the reception signals are split by a frequency divider. If only one of the two components are installed, the respective signal runs straight to the receiver and a divider is not needed.