Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
- Tools and devices
   Check of control tools and bulbs
   The combined device
   Indicator of amount of fuel
   Indicator of temperature of cooling liquid
   Auxiliary devices
   Control bulbs above in the combined device
   Control bulb of cooling liquid
   Control bulb of level of brake fluid
   Control bulb of pressure of oil
   Control bulb of indexes of turns
   Control bulbs in devices of a round form (and nearby)
   Control bulb of indexes of turn on the trailer
   Control bulb of ASR
   Control bulb of the lock of ignition
   Control bulb of headlights of a driving beam
   Control bulb of a safety cushion
   Control bulb of ABS
   Control bulb of the parking brake
   Control bulb of a battery charging
   System of autocontrol of the car
   Ignition lock
   Check of switches
   Alarm buzzer of lighting
   The warmed back glass
   Check of screen wipers and windscreen washers
   Engine of screen wipers
   The help at malfunctions
   The gulf of liquid for washing of glasses
   System of washing of headlights
   Adjustment of a mirror with the electric drive
   Central lock
   Window regulators with the electric drive
   Sliding/removable roof with the electric drive
   Radio receiver
   The antenna on back glass
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

The combined device

Here we dismantled the decorative panel of the combined device (3) to bare both fixing screws with crosswise heads (1 and 2).

The Mnogoshtyrkovy socket (2) can be removed from the combined device if highly to wring out a plastic clip (1).

To dismantle a back cover of the combined device, it is necessary to weaken both TORX 2 and 3 screws in the beginning. Figures 1 and 4 designated two of four screws which have to be weakened to unscrew a payment.

Dismantle of a back cover of the combined device: after weakening of screws it is necessary to open only six plastic clips (two of them are shown by figures "1" and "2").

The disassembled combined device: 1 – decorative panel; 2 – oil temperature indicator; 3 – a payment with devices; 4 – back cover; 5 – liquid crystal display.

At the left ahead on a transmission you see the pulse sensor of a tachometer (1). For dismantle of the pulse sensor wring out a clamp (a direct arrow) down, turn the pulse sensor (a curved arrow) and take out it from a transmission. At installation grease with vaseline rubber rings of round section.

Dismantle of the combined device


  1. Open the device of adjustment of a steering wheel, pull a steering wheel back and wring out down.
  2. Dismantle a steering wheel (the head Podvesk of wheels and a steering).
  3. Dismantle the top cover of lever switches behind a steering wheel. For this purpose weaken in the lower part of facing on the right and at the left two screws with crosswise heads and remove the top part of facing.
  4. Cast away the decorative panel under the combined device back.
  5. Weaken two screws with crosswise heads below on the combined device.
  6. Carefully take out the combined device from a control panel.
  7. Having weakened a clamp (highly wring out a plastic clip or deblock clamps), carefully remove the mnogoshtyrkovy socket.

 Council: When replacing of the combined device the workshop has to transfer information on run from the old device to the new. For these purposes the device for reading of the V.A.G 1551 computer is used. In the same way adjustment of the indicator of amount of fuel in a fuel tank, the indicator of fuel consumption and the indicator of frequency of maintenance is in case of need carried out.

Replacement of control bulbs in the combined device

Control bulbs change from a reverse side of the combined device without its further dismantling. Glow lamps of control bulbs in Audi are strongly soldered to the cartridges and as spare parts are on sale only assembled. Upon their purchase consider color of cartridges: the 1,1 W and 1,2 W bulbs with cartridges of different color are put. To dismantle a cartridge of a bulb, turn it on a quarter of a turn to the left and take out.

The same belongs and to illumination of a scale. But it is necessary to pay attention that some of these bulbs are supplied with orange caps. Caps are rearranged on new bulbs.

The faulty combined device

Unfortunately, Audi offers the combined device for replacement only assembled. Separate components are not on sale therefore at its malfunction it is necessary to dip a hand deeply into a pocket.

The one who is not afraid of electronics, maybe, at least to venture dismantling of the combined device and to examine a payment on existence of obvious defects.

Dismantling of the combined device


  1. Dismantle a back cover of the combined device. For this purpose weaken two TORX screws at the left and on the right and wring out six plastic clips.
  2. Unscrew a payment (four more TORX screws).
  3. The speedometer and tachometer are soldered by sockets; the tool, smaller by the size, is connected with big in one constructive element.
  4. Additional tools for measurement of temperature of oil and onboard tension are dismantled separately (a six-sided nut on a reverse side; the inserted sockets).