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 brake fluid

It will be necessary for carrying out work for you:

  • Cap key for an otvorachivaniye of the union of removal of air.
  • Transparent plastic hose with an internal diameter of 6 mm and capacity for collecting brake fluid.
  • Necessary amount of the brake fluid meeting the specification.

Repeatedly do not apply the brake fluid which was in the use. Old brake fluid is much more darkly fresher. It allows to distinguish them easily.

Brake fluid through a time of brake hoses and an air vent of the tank absorbs moisture. Thereof liquid boiling temperature in use decreases. At big load of brakes it can lead even to steam formation that reduces efficiency of action of brakes.

Brake fluid owes each 2 years, it is desirable in the spring, to be replaced with the new. At the frequent movement in the mountain district, liquid needs to be replaced more often.

On HUNDRED air from brake system, as a rule, is removed on the special device. However it can be done and without use of the specified device. Thus the brake system is pumped over by a brake pedal. For this purpose participation of the assistant is required.

If in the course of removal of air from brake system liquid level sharply decreases, there is a suction of the air getting to the pump ABS. In this case removal of air needs to be made on HUNDRED with use of the special device. When replacing any brake hose air needs also to be removed from system on HUNDRED. Until it is made, it is impossible to use the car.

Sequence of removal of air:

  1. Support the back right
  2. Support the back left
  3. Support the forward right
  4. Support the forward left

Pay attention to remarks according to safety measures at the treatment of brake fluid, address to the Section Removal of Air from brake system.

Cover (1) tank of brake fluid and tube under a carving stopper (shooter) for removal of brake fluid by means of a rubber pear


  1. By means of a pear remove brake fluid from the tank, having left a liquid about 10 mm thick layer at the bottom of the tank. Do not delete all liquid from the tank, differently air will get to brake system.
  1. Fill the compensation tank with new brake fluid to a tag the MOVE.
  1. Carefully, not to curtail, open the union of removal of air. It is recommended in 2 hours prior to removal of air to process the union means for removal of a rust. If the union does not open, operation on removal of air from brake system should be charged to a workshop.

  1. On the right back support of the disk wheel brake mechanism put on a pure transparent hose the union of removal of air and insert it into a suitable vessel.
  2. Ask the assistant to squeeze out repeatedly a brake pedal until counter-pressure to pressing of a pedal becomes notable. Press a pedal and open the union of removal of air. Close the union after the brake pedal rests against a body floor. Take away a foot from a pedal. Repeating this process, pump out about 400-500 ml of old brake fluid.
  3. Close the union of removal of air and fill in new brake fluid in the compensation tank.
  4. In the same way pump out old brake fluid from other supports or wheel brake cylinders, observing the sequence stated above.

The merged brake fluid anyway has to be pure and without air bubbles. From each brake support it is necessary to pump out about 400-500 cm of the 3rd old brake fluid.

  1. Hand over old brake fluid on special point on reception of the fulfilled fuels and lubricants.
  2. Press a brake pedal and check a free wheeling. It should not exceed 1/3 courses of a pedal.
  3. Fill in brake fluid in the tank to earlier existing level.
  4. Screw a stopper on the tank.
  5. Carry out reliability inspection:
    • Whether brake pipelines and hoses are fixed?
    • Whether there are brake hoses in holders?
    • Whether unions of removal of air are tightened?
    • Whether enough liquid is filled in in system?
  6. On the working engine check tightness of system. For this purpose press about 10 times a brake pedal with effort of 200 - 300 N (there correspond 20 - 30 kg). The pedal of a brake should not leave back. Check all connections for tightness.
  7. In summary check action of brakes on the road with not heavy traffic of transport. For this purpose it is necessary to make not less than one strong braking, having checked action of ABS (a sign of work of ABS the brake pedal pulsation when braking is).

Watch the transport going following your car. The effect of action of ABS is best of all shown on an unpaved road.

It is not necessary to pour out brake fluid together with household waste or somewhere in other place.