Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
- 12. Brake system
   12.2. Antiblocking system – ABS
   12.3. The additional equipment – system ASR
   12.4. Specifications of brake system
   12.5. Overlays of lobbies brake колодок
   + 12.6. Overlays of back disk brakes
   12.7. A support
   12.8. A forward brake disk
   12.9. A back brake disk
   12.10. A brake liquid
   12.11. Removal of air from brake system
   12.12. Brake pipelines / hoses
   12.13. Replacement of brake highways
   12.14. Brake колодки a lay brake
   12.15. Adjustment of a lay brake
   12.16. The stoplight switch
   12.17. Diagnostics of malfunctions of brakes
   + 12.18. Wheels and tyres
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

12.13. Replacement of brake highways

Brake hose of a forward axis

Brake hose of a back axis


1. Raise the car.
2. Remove накидную a nut from the brake pipeline.
The prevention

Thus the brake liquid follows. Close a suitable stopper an element of connection of a brake wire in a direction of the main brake cylinder that the brake liquid completely has not flowed out from a tank. After repeated installation air should be removed from brake system. The special device is necessary for removal of air from a brake of cars with ASR, therefore address in repair shop. Collect a brake liquid in the vessels intended only for it.

3. The new pipeline of a brake liquid whenever possible lay on the same place.
4. At pipeline connection moisten a conic surface прилегания with several drops brake, liquids and tighten with the moment 15 Н.м.
5. The brake pipeline (5) or (6) unscrew from a brake hose (51). Use open a superimposed wrench 9х11, holding a brake hose рожковым with a wrench. A connection element close a stopper.
6. Disconnect the holder of a brake hose (51а).
7. Unscrew a brake hose (51) of a support.


1. To establish only resolved to use by firm brake hoses.
2. Tighten a brake hose on a support with the moment 20 Н.м.
3. Screw a brake hose on the brake pipeline with the moment 15 Н.м. The brake hose at installation should not be overwound. Fix a lock washer at the holder двенадцатигранником. So insert a brake hose into a lock washer that it at full turn of operated wheels to the left or to the right about what did not hit. 4 – the brake pipeline, 13 – накидной a bolt, 59 – the holder of a brake hose.
The prevention

After repair the holder (52) can be bent. Cautiously correct it since even minor alteration of position of the holder on the basis of a frame can change passage of a brake hose therefore it can be wiped, adjoining to other parts of the car.

4. Pump over brakes.
The prevention

Carry out the safety control:

      – Whether all brake pipelines / hoses are tightened;
      – Whether prorolling screws are tightened;
      – Whether level of a brake liquid is perfectly in order;
      – At the working engine make the tightness control. For this purpose press a pedal of a brake with effort from 200 to 300 Н (20–30 kg) within approximately 10 seconds. The pedal should not move. Check tightness of all connections.

5. In summary make some braking in silent street.

The control of the amplifier of braking

The control of the amplifier of braking is made in the event that for achievement of sufficient effect of braking it is necessary to make too big effort to braking pedals.

1. At the stopped engine a minimum of 5 times strongly press a brake pedal, then start the engine at the loaded brake pedal. Thus the brake pedal should move aloud under a foot.
2. Otherwise unscrew a hose of depression from the braking amplifier, start the engine. Having put fingers to the end of a hose of vacuum, check up vacuum presence.
3. If the vacuum is not present, check up a hose on tightness and damage, in case of need replace it. Strong tighten all collars of hoses.
4. If the vacuum is, measure it, in case of need, replace the braking amplifier (work in repair shop).


Pedal / a forward drive of a cable

12i. A protective cover
12. The automatic equalizer of length of a cable
94. An ottjazhnaja spring
85. A forward brake cable
75. A mobile lath
84в. A coupling ring
043. The razzhimnoe device
71. The case
73. Shestigrannye bolts
S12. Штеккер the switch of a lay brake
80. A spring clip
79. Draught
71. A pedal
94. An ottjazhnaja spring

Removal of a brake cable

1. Remove a back seat.
2. Remove a protective cover (12i).
3. Tighten the automatic equalizer of length of a cable (12). For this purpose turn a wrench with internal шестигранником a crank (g) approximately on 1/2 turns to the right and simultaneously advance it back in longitudinal шлице while it will not be fixed in the spring case () in a spring clip (g). (e – the equalizer lever, f – the intermediate lever, 93 – a safety pin.)
4. Unhook оттяжную a spring (94).
5. Disconnect a brake cable (85) from a mobile lath on a pedal, compress together a coupling ring (85в) with разжимным the device (043) and extend a cable. If is not present on hand разжимного the device (the special tool), the cable can be taken, having removed a coupling ring. At installation a coupling ring insert into a cable flute.

Removal of the device of a pedal

1. Remove the case from the device of a pedal and unscrew шестигранные bolts (72).
2. Disconnect штеккер the switch of the control of a lay brake (S12). For this purpose it is necessary to raise the pedal device a little.
3. Remove a spring clip.
4. Disconnect a cable of manual adjustment (79) and take the pedal device.


1. Installation is made in an order, the return to dismantling of the device of a pedal.
2. Before installation of a protective cover to weaken the equalizer of length of a cable. For this purpose raise a screw-driver a spring clip. After that the equalizer of length of a cable is established automatically.
3. Some times put in action a lay brake, thus it is adjusted spontaneously.