Audi A4

Since 1994 of release

Repair and car operation

Audi А4
- Running gear
   Protection of passengers
   Full zinc covering
   Full drive
   Drive concepts on all wheels
   Distributive torsen-differential
   Dynamics of movement on dry road
   Maintenance instructions of cars quattro
   The mechanism of blocking of differential
   Additional works on maintenance service
   Impellent compartment
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

The mechanism of blocking of differential

If the previous model Audi 80 has been still supplied by mechanical blocking of a back axis in А4 blocking is carried out by system EDS. Its advantage consists that blocking operates also on forward wheels, but there is a lack which consists that the effect of blocking is reached only at the expense of braking of a turned wheel that under certain conditions operation is less effective, than at mechanical blocking.

System EDS is closely connected with antiblocking system, therefore the technical information about EDS read in section ABS and EDS.