Mercedes of the S-class W202

1993-2000 of release

Repair and operation of the car

Mercedes W202
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Lubrication system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. System of ignition
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
- 12. Brake system
   12.2. Anti-blocking system – ABS
   12.3. The additional equipment – the ASR system
   12.4. Specifications of the brake system
   12.5. Overlays of front brake shoes
   - 12.6. Overlays of back disk brakes
      12.6.1. Check of thickness of brake disks and their side beating
   12.7. Support
   12.8. Forward brake disk
   12.9. Back brake disk
   12:10. Brake fluid
   12:11. Removal of air from the 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. Electrical circuitries

12.6.1. Check of thickness of brake disks and their side beating

1. Mark with paint the provision of wheels concerning a nave. Thanks to it the balanced wheel after removal can be put on the place that balancing was not broken. Release wheel bolts, without lifting the car, then Raise the car and remove wheels.
2. Measure thickness of brake disks. In workshops the micrometer or a special caliper (035) as at wear on the edge of a disk the fillet is formed is for this purpose used. It is possible to measure thickness of disks and a usual caliper, but in this case on each party of a brake disk it is necessary to use on rigid laying (for example, 2 coins). To learn at the same time disk thickness, it is necessary to subtract thickness of laying from indications.


At more exact measurements by means of a micrometer it is necessary to take measurements at least in eight points of a disk. At the same time thickness has to remain a constant within the admission of 0,02 mm.

3. On reaching the minimum thickness it is possible to change brake slips once again. If the limit of wear is reached, replace brake disks.
4. The cooled brake disks with thin cracks to 25 mm of length which can arise because of high loading, replace there is no need. At big cracks or roughnesses more deeply than 0,5 mm replace disks.
5. Repair of brake disks is inadmissible. It is necessary to replace both disks with axes.
6. If on hand there is an hour indicator, measure a side beating of a brake disk in a collected state. Put the hour indicator of small movements to the center of a brake surface.


Too big side beating can be a consequence of the increased gap in wheel bearings therefore, first of all, it is necessary to adjust this gap. If it gave nothing – replace a brake disk.

7. 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 m 110 N.' moment.

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