ABS Mark 60 , From 10.00

Brake Booster and Master Cylinder Assembly Overview

With ABS/EDL/ASR/ESP

• Complete brake master cylinder and brake booster can be replaced separately.





1 Brake booster, left-hand drive vehicles

• On gasoline engines vacuum is supplied from intake manifold.

• On vehicles with gasoline engine and automatic transmission, there is also the brake system vacuum pump (V192) installed.

• On diesel engines, a vacuum pump is installed for vacuum.

Function test

• With engine switched off, depress brake pedal firmly several times (to deplete vacuum).

• Depress and hold brake pedal with average foot pressure and start engine. If brake booster is working properly, pedal will be felt to give noticeably under foot (booster assist becomes effective).

• If malfunctioning: replace as complete unit.

• Check valve (in vacuum hose) => [ check valve. ] .

Function test => [ check valve. ] .

• Brake assist in brake booster

Function test => [ Brake Booster Brake Assist, Checking Function, from 12.01 ] Testing and Inspection.

• Disconnect from brake pedal => [ Brake Pedal to Brake Booster, Disconnecting and Connecting ] Brake Pedal to Brake Booster, Disconnecting and Connecting.

• Removing and installing => [ Brake Booster ] Brake Booster.

2 Cap

3 Brake fluid reservoir, left-hand drive vehicles

4 Sealing plugs

• Coat with brake fluid and press into expansion tank

5 Retaining pin

• Insert through master brake cylinder

6 Brake master cylinder, left-hand drive vehicles

• Must not be serviced. Replace as complete unit if malfunctioning.

7 Retaining plate

• Helps secure wiring harness

8 Self-locking hex nut, 20 Nm

9 Brake fluid reservoir, right-hand drive vehicles

10 Retaining plate

• Helps secure wiring harness

11 Bleeder valve

12 Brake master cylinder, right-hand drive vehicles

• Must not be serviced. Replace as complete unit if malfunctioning.

13 Brake pressure sensor 1 (G201)

14 Bolt

• For mounting of brake fluid reservoir to master brake cylinder

15 Seal

• Replace

16 Brake booster, right-hand drive vehicles

17 Gasket

• For brake booster

18 Self-locking hex nut, 20 Nm

19 Boot

• Check for proper seat, danger of intake noises

20 Bracket

• Secured to edge of brake booster

21 Heat shield

22 Sealing plugs