Mercedes C-Class

W203 since 2000 of release

Repair and car operation

+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
- Brake system
   Replacement of blocks of a forward disk brake
   Removal and installation of a forward support
   Replacement of back brake shoes
   Removal and installation of a back support
   Removal and installation of a brake disk
   Check of a brake disk
   Dual main brake cylinder
   Replacement of brake shoes of the parking brake
   Removal and installation of a cable of a drive of the parking brake
   Removal and installation of the switch of a stoplight
   Air removal from brake system
   Removal and installation of a brake hose
   Check of the amplifier of a brake
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Replacement of brake shoes of the parking brake

The parking brake is built in a brake drum.



1. Completely release the parking brake and weaken a driving cable, address to the Section of Check of brake system. Adjustment of the parking brake.
2. Mark with paint the provision of back wheels concerning naves. It will allow to establish at assembly otbalansirovanny wheels in their former situation. Weaken bolts of fastening of a wheel before a car poddomkrachivaniye. Lift a back part of the car, put it on supports and remove back wheels.

Operation of lifting and car installation on supports is connected with danger! Therefore before carrying out operation familiarize with Poddomkrachivaniye's Section and Introduction towage to the management.

3. Remove a support of a back brake, address to appropriate section.
4. Remove a brake disk, address to appropriate section.

Before removal of separate details of a drum-type brake remember their arrangement. As an example use a brake on other party.

5. Disconnect a returnable spring (1) from a brake shoe (3) by means of special nippers (2) or screw-drivers.

6. Turn a flange of a power shaft (1) so that the carving opening was over a press spring (2).

7. Compress a spring (2) by means of the MERCEDES-BENZ 040 (3) tool or a screw-driver a little to turn it on 90 ° and remove.

Specified the tool can be made independently. For this purpose on one end a prutka of the corresponding diameter weld the handle, and on other end saw through a groove depth about 4 mm and in the width about 2.5 mm.

8. Similarly remove a press spring on the second brake shoe.

9. Take away from each other both brake shoes (1) and remove them through a flange of a power shaft. Pay attention to position of the adjusting mechanism that is necessary for the subsequent correct installation.

10. Disconnect a coupling spring (4) from brake shoes and take out the adjusting mechanism (details with 1 on 3).

11. Squeeze out a finger (5) on the razzhimny lock (6) and remove the lock from a brake cable.



1. If overlays of the brake shoes which were in work burned down, it is necessary to replace coupling springs of blocks also.
2. Grease with a thin layer all basic and sliding surfaces on the rasporny lock. As greasing use high-temperature paste (for example, LIQUI MOLY LM-36, MOLYKOTE-PASTE-U or G-RAPID).
3. Disassemble the adjustment mechanism. Grease with high-temperature greasing a carving of a press element (1), and also a cylindrical part of an adjusting gear wheel (2).
4. Screw press an element (1) in an adjusting gear wheel (2) and insert into the press plug (3). Thus press an element screw completely.
5. Fix a cable of a drive of the parking brake with a finger on the rasporny lock. After that press the rasporny lock in the direction of a brake board. At installation watch that the mobile element of the rasporny lock showed up.
6. Insert the adjusting mechanism between both brake shoes so that press the element showed in the movement direction.
7. Connect the first coupling spring (4) to a brake shoe. Check correctness of connection.
8. Stretch brake shoes, insert them through a flange of a power shaft and connect to the rasporny lock.

9. Insert a press spring (1) by means of the tool 040 MERCEDES-BENZ (3) or a screw-driver (2) through a carving opening in a brake shoe, compress it a little, turn on 90 ° and connect to a locking ring. Check correctness of connection of a spring. The hook of a press spring should be fixed from the interior of a brake board.

10. Connect a press spring to the second brake shoe.

11. Depending on execution the second coupling spring has on the ends various hooks on size. Connect the second coupling spring to the rasporny lock a small hook for the top brake shoe. A big hook (the shooter on an illustration) a screw-driver connect to the bottom brake shoe.

12. Establish a back brake disk, address to appropriate section.
13. Establish a back support, address to appropriate section.
14. Establish into place back wheels so that the marks put at removal coincided. Previously grease with a thin layer of bearing greasing aligning belt of a disk of a wheel on a nave. Bolts of fastening of wheels do not grease. Rusty bolts replace. Wrap bolts. Lower the car on wheels and tighten bolts cross-wise the moment 110Нм.
15. Adjust the parking brake, address to the Section of Check of brake system. Adjustment of the parking brake.

Several times, strongly press a brake pedal until notable resistance will be felt. Thus, brake shoes adjoin to a disk and occupy the working situation.

16. Check level of brake liquid in the tank, if necessary add liquid to MAX mark.

Carry out reliability control:

· Whether brake hoses are fixed?
· Whether the brake hose in the holder is fixed?
· Whether unions for air removal are tightened?
· Whether enough of brake liquid is filled in?
· On the working engine check tightness. For this purpose press a brake pedal effort of 200-300 N (20-30 kg) during 10 pages. The pedal should not weaken. Check all accessions on tightness.