Audi A4, S4

Since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
- Current leaving and service
   The indicator of term of approach of maintenance service
   The routine maintenance schedule
   The general information on adjustment
   Check of levels of liquids, the control of leaks
   Check of a condition of tyres and pressure in them. A designation of tyres and disks of wheels. Rotation and replacement of wheels
   Replacement of impellent oil and the oil filter
   Checks of brake system. Adjustment of a lay brake
   Check of fuel system
   Check of a condition and replacement of hoses of an impellent compartment, localisation of leaks
   Check of a condition of ridge belts of a streaming drive of auxiliary units
   Check of functioning of system of cooling and frost resistance of a cooling liquid
   Check of a condition of system of release of the fulfilled gases
   Check of level of oil of automatic transmission
   The visual control of a box of a gear change and the main transfer on leaks, check of level and oil addition
   Check of a condition a suspension bracket and steering component
   Check of a condition of protective covers of power shafts
   Check of level of a liquid of system of hydrostrengthening of a wheel
   Check of a central air of air
   Greasing of terminators of doors, cylinders of locks, cowl hook, сдвижной panels of the hatch of a roof
   The visual control of a seat belt and the block of a pillow of safety
   Check of working capacity of headlights and horn
   Condition check, adjustment and replacement of brushes of screen wipers
   Check of a condition of the battery, care it and gymnastics
   Replacement of the battery of emergency supply of system Telematik
   Replacement of an element of the filter of air of salon / the coal filter of clearing of air
   Replacement of a brake liquid
   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 condition and tension of a gear belt
+ The engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Checks of brake system. Adjustment of a lay brake

The dust formed as a result of deterioration of overlays and accumulating on components of the brake mechanism, can contain hazardous to health asbestos. Do not blow this dust by means of compressed air and do not inhale it! Do not use solvents on the basis of gasoline for dust removal. The dust should be washed off a special cleaner of brake system or methyl spirit in drain capacity. After rubbing the component of brake system a damp rag should be held this rag and contents of drain capacity in the closed and signed container. Further, whenever possible, try to use components not containing asbestos.

Except checks through the established intervals of time a condition of brake mechanisms it is necessary to spend each time at removal of wheels or at occurrence of signs of malfunction in system. For driving safety the checks of brake system described below procedure are most important of all procedures made by you on car service.

Signs of malfunctions in brake system

Disk brake mechanisms can have the built in indicators of deterioration of frictional overlays which signal that deterioration of overlays has reached critical size. Thus overlays should be changed immediately, differently brake disks will be damaged also by it expensive repair is required.

Any of listed below signs can specify in potential defect of brake system:

  1. At squeezing of a pedal of a brake the car "withdraws" in one party.
  2. Brake mechanisms at braking publish scraping or squealing sounds.
  3. The brake pedal has an excessive course.
  4. The brake pedal pulses (it normally only at system ABS work).
  5. Leaks of a brake liquid (usually on a tyre or wheel inside) are observed.

In case of detection at least one of these signs immediately examine elements of brake system.

Brake lines and hoses

In brake system basically steel brake tubes, except for the flexible reinforced hoses at forward wheels and as connections at the back bridge are used. Regular survey of all these lines is very important.


  1. Поддомкратьте the car and reliably establish it on support.
  2. Remove wheels (address to Section Check of a condition of tyres and pressure in them. A designation of tyres and disks of wheels. Rotation and replacement of wheels and to materials of the head Controls and receptions of safe operation).
  3. Check up all brake lines and hoses on presence of cracks and attritions in their external covering, leaks, swellings and deformations. Check up brake hoses in forward and back parts of the car on presence of signs of a softening, cracks, deformations or deterioration as a result of a friction about other components. Check up all штуцерные connections on presence of signs of leaks and make sure of reliability of fastening of all bolts and clips of brake hoses.
  1. Bend hands in one and other parties a brake hose to reveal damages. To braid hoses does not follow. Watch a direction of the colour line put on a hose!
  1. Turn a steering wheel to the right and to the left against the stop. Hoses should not touch elements of a design of the car thus. At detection of leaks of a liquid or their damages it is necessary to eliminate immediately. For more detailed description of procedure of repair of brake system address to the Head Brake system.

Check of a thickness brake колодок

Check of a thickness brake колодок forward wheels

Check of a thickness brake колодок back wheels

The thickness external brake колодок can be checked up through an aperture in a disk of a wheel by means of a pocket small lamp. Internal колодку it is possible to check up by means of a pocket small lamp and a mirror. If it is necessary to estimate more precisely a thickness Pads, it is necessary to remove a wheel and to measure колодку by a calliper.

Experience shows that deterioration brake Pads wheels from outside the forward passenger more than from outside the driver. Therefore for check of a thickness brake Pads it is recommended to remove a wheel from outside the forward passenger.


  1. Note a paint position of a forward wheel in relation to a nave. It will allow to establish the balanced wheel in the working position. Loosen the bolts of fastening of a wheel. Thus the car should stand on the earth.
  2. Lift a forward part of the car and establish on supports. Remove a forward wheel.
  1. Thickness (arrows on an illustration) internal and external колодок check up through an aperture in a support.
  1. Limit of deterioration of a thickness brake колодок will reach, if the overlay Pads has a thickness of 2.0 mm (7 mm together with a basis plate). In this case brake колодку it is necessary to replace, address to Sections Removal and installation of lobbies brake колодок and Removal and installation колодок brake mechanisms of back wheels.

In practice, 1 mm of deterioration brake Pads corresponds at least 1000 km of run of the car. This rule corresponds to adverse service conditions of the car. In normal conditions deterioration колодок is much less. At a thickness Pads 10.0 mm (with a basis plate) колодка can be maintained still not less than 3000 km.

  1. Check up possibility of leak of a brake liquid in supports. At presence негерметичности urgently repair a support (work HUNDRED).
  2. Visually check up brake disks on presence of flutes, traces of influence of corrosion and cracks. With cracks in the thickness in hair and length to 25 mm the raised loading can be which reason of occurrence, it is not necessary to replace ventilated disks. At cracks and grooves more brake disks it is necessary to replace than 0.5 mm with depth.
  3. Check up a thickness of brake disks, address to Section of the Head Brake system.
  4. Establish into place forward wheels so that the labels put at removal have coincided. Preliminary grease with a thin layer подшипниковойсмазки aligning belt of a disk of a wheel on a nave. Bolts of fastening of a wheel do not grease. Rusty bolts replace. Wrap bolts. Lower the car on wheels and tighten bolts cross-wise.

Check and extra earnings of a lay brake



  1. Pass on the car and stop it on road with not transport heavy traffic.
  2. Extend the lever of a lay brake on 3 teeth and release a foot brake.
  3. The lay brake has sufficient efficiency of action if the car is reliably kept.

If the lay brake is pressed through further on distance to 5 teeth, it is necessary to regulate a brake.

Brake extra earnings

As a lay brake serve 2 drum-type brakes located in back disk brakes. Thanks to it the lay brake wears out slightly. Owing to corrosion of a brake drum or pollution brake колодок the brake moment can decrease. For achievement of optimum action of its brake it is necessary to earn extra.


  1. Pass on dry road not having heavy traffic.
  2. For the speed about 50 km/h establish a transmission in neutral position. Extend the handle of a lay brake. Thus stop the car. At braking by a lay brake the braking signal does not light up. For this reason be especially attentive in relation to moving behind to transport.
  3. Continue movement on the car with constant speed about 50 km/h.
  4. Extend the handle of a lay brake, approximately on 10 сек and release.

If the lay brake is badly tightened, after its cooling repeat braking process.

  1. If the lay brake after check is released badly or after extra earnings and adjustments is tightened on the one hand, check up brake Pads and cables, if necessary replace.