Audi A4

since 1994 release

Repair and operation of the car

A4 Audi
- Running gear
   Protection of passengers
   Full zinc covering
   Full drive
   Concepts of the all-wheel drive
   Distributive torsen-differential
   Dynamics of the movement on the dry road
   Maintenance instructions of quattro cars
   Mechanism of blocking of differential
   Additional works on maintenance
   Motive compartment
+ 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
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Maintenance instructions of quattro cars

The stand for test of brakes


  1. An inspection of brakes on each axis can be carried out at the standard, slowly rotating stand for test of brakes (a move. 6 km/h).
  2. Thus the drive has to be from the test bench.
  3. It is impossible to include transfer and blocking of differential.

The stand for check of power


  1. Check of power at the traditional roller stand for two wheels is impossible.
  2. The roller test bench of power for four wheels has to be used.



  1. All four wheels have to pass an identical site of a way (in an ideal to have also identical depth of a profile) for 1 turn.
  2. Balancing of wheels on the car (dynamic balancing) it is possible only if all four wheels are raised.
  3. The drive has to be carried out from the car engine (not from the balancing car). Important: switch off the emergency brake.

Winter tires


  1. Winter tires are recommended to be used also on quattro cars. Not so much because of road performance, how many because of brake characteristics.
  2. Chains of antisliding can be used when it is offered, also on quattro cars. Here too argument are brake qualities
  3. Chains of antisliding and on quattro are put only on forward wheels.



  1. If at towage all four wheels slide on soil, it is not necessary to observe any special instructions.
  2. If one of axes cannot slide (after accident), the car needs to be shipped on the wrecker.
  3. If there is no such wrecker, Audi can be towed with the raised axis. Condition: not further, than on 50 km, and not quicker, than 50 km/h. In case of excess of this limit damages of system of transfer because of a lack of greasing are possible.