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Remove/install stepped tandem master brake cylinder - AR42.10-P-0310GZ

MODEL 164 

Fig 1: Identifying Stepped Tandem Master Brake Cylinder Components (1 Of 2)
G05258401Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 2: Identifying Stepped Tandem Master Brake Cylinder Components (2 Of 2)
G05258402Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
REMOVINGINSTALLING Remove/install    
DANGER Risk of poisoning  caused by swallowing brake fluid. Risk of injury  caused by brake fluid coming into contact with skin and eyes. Pour brake fluid only into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. AS42.50-Z-0001-01A 
NOTES Brake fluid notes All models AH42.50-P-0001-01A 
NOTES Notes on repairs to brake system All models AH42.00-P-0003-01A 
NOTES Notes on externally invisible brake fluid loss All models AH42.10-P-9406-02GZ 
1 Reduce vacuum in BAS brake booster IMPORTANT To do this, press the brake pedal several times with the engine switched off.  
2 Open engine hood and raise to vertical position   AR88.40-P-1000GZ
3 Detach rubber seal (1) in the area of the section, left partition wall (4)    
4 Remove bolt (2)    
5 Detach section, left partition wall (4) from the clips (3)    
6 Detach connector of the brake fluid indicator switch (5)    
7 Unscrew union nuts from pressure circuit brake line and unscrew secondary brake circuit brake line (6) from stepped tandem brake master cylinder (10) NOTES Before unscrewing, mark the brake line relative to the corresponding connection as here is a risk of mixing up! 
NOTES Plug connections with blind plugs to prevent brake fluid flowing out.
 
    TORQUE SPECIFICATION *BA42.10-P-1003-04J 
    SPECIAL TOOL Box wrench bit Fig 3
    SPECIAL TOOL Set of stop plugs Figure
8 Unscrew nuts (7) from stepped tandem brake master cylinder (10) IMPORTANT Check stepped tandem brake master cylinder for leaks at rear primary piston.  
    TORQUE SPECIFICATION *BA42.10-P-1001-05H 
9 Pull stepped tandem brake master cylinder (10) off threaded studs and turn to the side NOTES Do not tilt stepped tandem brake master cylinder (10), but pull out from the front otherwise the thrust rod no longer makes axial contact and can break free of the retaining lugs at the master control unit.  
10 Detach connector of ESP brake pressure sensor (8)    
11 Remove stepped tandem master brake cylinder (10) IMPORTANTInstallation:  Replace O-ring (16).  
12 Remove screw (12) TORQUE SPECIFICATION *BA42.10-P-1003-05H 
13 Pull brake fluid reservoir (11) out of stepped tandem brake master cylinder (10) IMPORTANTInstallation:  Check reservoir plugs (15) and replace if necessary.  
14 Remove bolts (13) TORQUE SPECIFICATION *BA42.10-P-1002-05H 
15 Remove impact deflection panel (14)    
16 Unscrew ESP brake pressure sensor (B34) TORQUE SPECIFICATION *BA42.45-P-1001-01J 
17 Install in the reverse order    
18 Bleed brake system   AR42.10-P-0010GZ 
    FLUID SPECIFICATION Brake fluid *BF42.10-P-1001-01G 
INSPECT Checking     
DANGER Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the running engine Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not grasp hot or rotating parts.
AS00.00-Z-0005-01A
19 Check brake system for leaks   AR42.10-P-0100-01GZ 
DANGER Risk of death  caused by body parts being pulled in by rotating vehicle wheels and roller dynamometer rollers Do not insert your hand into rotating parts.
Wear closed and snug-fitting work clothes.
Safeguard areas with rotating vehicle parts and dynamometer rollers against unauthorized access.
AS00.00-Z-0019-01A
20 Perform a function test Safeguard roller dynamometer from unauthorized access.    
REFER TO MAINTENANCE Brake testing on test stand   AP42.00-P-4290GZ 
BRAKE LINES, BRAKE HOSES

Number Designation Model 164.1/8
BA42.10-P-1003-04J Brake pipe to master brake cylinder Nm 18
MASTER BRAKE CYLINDER

Number Designation Model 164.1/8
BA42.10-P-1001-05H Nut, brake master cylinder to brake booster Nm 10
BA42.10-P-1002-05H Bolt, impact deflection panel to master brake cylinder Nm 14
BA42.10-P-1003-05H Bolt, brake fluid reservoir to master brake cylinder Nm 4
ELECTRONIC STABILITY PROGRAM (ESP)

Number Designation Model 164.1/8
BA42.45-P-1001-01J Brake pressure sensor to master brake cylinder Nm 35
BRAKE FLUID

Number Designation Model 164.1/8
BF42.10-P-1001-01G Brake fluid Filling capacity Liters ≈ 0.8
Specifications for Operating Fluids Sheet BB00.40-P-0330-01A
Sheet BB00.40-P-0331-00A
Fig 3: Identifying Box Wrench Bit (140 589 00 03 00)
G05258403Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 4: Identifying Set Of Stop Plugs (129 589 00 91 00)
G05258404Courtesy of MERCEDES-BENZ OF NORTH AMERICA.