S-class W202 Mercedes

1993-2000 of release

Repair and car operation

W202 Mercedes
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
- 12. Brake system
   12.2. Anti-blocking system – ABS
   12.3. The additional equipment – ASR system
   12.4. Specifications of brake system
   12.5. Overlays of forward brake shoes
   + 12.6. Overlays of back disk brakes
   12.7. Support
   12.8. Forward brake disk
   12.9. Back brake disk
   12.10. Brake liquid
   12.11. Air removal from brake system
   12.12. Brake pipelines / hoses
   12.13. Replacement of brake highways
   12.14. Brake shoes of the parking brake
   12.15. Adjustment of the parking brake
   12.16. Stoplight switch
   12.17. Diagnostics of malfunctions of brakes
   + 12.18. Wheels and tires
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes

b47c026d b47c026d

12.7. Support


Support of a forward wheel

Support of a back wheel


1. Mark with paint the provision of wheels concerning a nave. Thanks to it the otbalansirovanny wheel after removal can be put on the place that balancing was not broken. Release wheel bolts, without lifting the car, then put the car on supports and remove wheels.
2. Switch off ignition. Unscrew and get the sensor of number of turns of ABS system (L6/1).
3. Unscrew 2 bolts of fastening of a brake support of a back wheel (35) to the case of bearings of a wheel and remove it outside.
4. Suspend a support by means of a self-made hook to a body so that were not overwound and the brake hose and a wire of the sensor of wear of brake slips were not drawn.
5. If the support has to be removed completely, unscrew at first a brake hose (51) from a hydrowire, applying for this purpose an open double cap key of 9х11 mm. Then unscrew a brake hose from a support.

Brake liquid will begin to flow. Close immediately openings caps that the tank did not become empty. After installation the brake system needs to be pumped over. In cars with antiprobuksovochny system ASR pumping of brakes needs the special device applied in specialized workshops. Following brake liquid collect in specially intended capacity. Observe instructions according to the treatment of brake liquid (see subsection 12.10.).

6. Disconnect the sensor of wear of slips on the support socket. Unscrew the socket from a support.


1. At replacement keep in mind: the brake mechanism on both wheels of one axis should have identical pistons of the same manufacturer.
2. Forward brakes: put a support and tighten it to a nave two new самоконтрящимися bolts with the moment of 115 N of m.

If bolts go hard, clear a carving of the remains of fixing means by means of a tap of M 12х1,5.

3. Back brakes: put a support and fix two new самоконтрящимися bolts on a nave with the moment of 50 N of m, in cars with ASR system – 70 N of m.

If bolts go hard, clear a carving of the remains of fixing means by means of a tap of M 10.

4. If the brake hose acted in film, screw it with the moment of 15 N of m on a hydrowire. At installation the hose cannot be overwound. On an arm (52) the lock plate (60) with a dvenadtsatigrannik is fixed. A brake hose (51) insert into a lock plate so that it went freely at complete turn of a wheel to the left and to the right, at compression and stretching of a spring of a suspension bracket. 4–a hydrowire, 13 – the cap screw, 59 – an arm of a brake hose.
5. Grease an opening for the sensor of number of turns of ABS system with means of Molykote Longtherm 2. Check a ring of round section, if necessary – replace. Put the sensor of number of turns, having tightened it a new bolt with an internal shestigrannik with the moment of 20 N of m,
6. Connect a wire of the sensor of wear of slips to the socket on a support.
7. If the brake system opened, pump over brakes.
8. Put wheels so that the marking put before their removal coincided. Screw wheels. Remove the car from supports and tighten wheel bolts in a crosswise order with the moment of 110 N of m.

Vigorously repeatedly понажимайте on a brake pedal, will not feel yet strong resistance. Thanks to it there is an adjustment of brake slips.

9. Check level of brake liquid in a tank, if necessary add to the maximum mark.

Carry out safety control:
      – whether brake hoses are tightened;
      – whether there is a brake hose in an arm;
      – whether pumping screws are tightened;
      – whether as it should be level of brake liquid

  At the working engine make tightness control. For this purpose press a brake pedal with effort from 200 to 300 N (20–30 kg) within about 10 seconds. The pedal should not move. Check tightness of all connections.

10. In summary make some braking on the silent street.