Audi A4, S4

since 2000 release

Repair and operation of the car

Audi A4, S4
+ Introduction
+ Governing bodies and methods of safe operation
- Current leaving and service
   Maintenance approach term indicator
   Schedule of routine maintenance
   General information on control
   Check of levels of liquids, control of leaks
   Check of a condition of tires and pressure in them. Designation of tires and disks of wheels. Rotation and replacement of wheels
   Replacement of motive oil and oil filter
   Checks of brake system. Adjustment of the parking brake
   Check of fuel system
   Check of a state and replacement of hoses of a motive compartment, localization of leaks
   Check of a condition of ridge belts of the streaming drive of auxiliary units
   Check of functioning of the cooling system and frost resistance of cooling liquid
   Check of a condition of system of production of the fulfilled gases
   Check of level of oil of automatic transmission
   Visual control of a box of gear shifting and the main transfer on leaks, check of level and addition of oil
   Check of a state component of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Check of level of liquid of system of hydrostrengthening of a wheel
   Check of the air conditioning system
   Greasing of limiters of doors, cylinders of locks, hook of a cowl, movable panel of the hatch of a roof
   Visual control of a seat belt and block of a safety cushion
   Check of operability of headlights and horn
   Check of a state, adjustment and replacement of brushes of screen wipers
   Check of a condition of the battery, care of it and charging
   Replacement of the battery of emergency supply of Telematik system
   Replacement of an element of the filter of air of salon / coal filter of purification of air
   Replacement of brake fluid
   Check and replacement of spark plugs. Check of a condition of high-voltage wires
   Replacement of an element of the air filter of the engine
   Replacement of the fuel filter
   Check of a state and tension of a gear belt
+ Engine
+ Cooling systems, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Replacement of the fuel filter

Gasoline and diesel fuel are extremely flammable therefore during the work with any components of fuel system it is necessary to take special precautionary measures. Do not smoke and do not come nearer to a venue of works with naked flame or the carrying unprotected by the lamp shade. Do not perform such works in the garages equipped with the heating devices working at natural gas (such as vodogre, dryers, etc.). The working platform has to be ventilated well. At hit of gasoline on skin immediately wash away it water with soap. When carrying out any works with fuel system put on goggles and hold near at hand the fire extinguisher.

Petrol engines

Procedure of replacement is described in the Section Removal and installation of the fuel filter.

Diesel engines

Replacement of the fuel filter. Diesel engine of 1.9 l

Replacement of the fuel filter. Diesel engine of 2.5 l


  1. Remove a lock bracket (5) and the adjusting valve (2) with the attached fuel hoses.
  2. Disconnect from branch pipes fuel hoses (3) and (4).
  3. Weaken a collar on the holder (1) and take out the filter from the holder.
  4. Fill the new filter with pure diesel fuel. Thanks to it it will be possible to start the engine quicker.
  5. Insert the filter in the holder, displace it down and tighten a collar.
  6. Insert the adjusting valve with the attached hoses. Thus watch the correct provision of a sealing ring in the filter case.
  7. Establish a lock bracket on the adjusting valve.
  8. Put on hoses connecting branch pipes. Fix hoses collars.
  9. Start the engine. Thus air from fuel system is removed.
  10. Visually check fuel system for tightness.