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Bleed brake system - AR42.10-P-0010MCU

MODEL 451.3/4 

Fig 1: Identifying Brake Fluid Reservoir, Brake Caliper And Wheel Brake Cylinder
G10978401Courtesy of MERCEDES-BENZ USA
REMOVING Remove     
DANGER Risk of poisoning  caused by swallowing brake fluid. Risk of injury  caused by brake fluid coming into contact with skin and eyes. Only pour brake fluid 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   AH42.50-P-0001-01A
NOTES Notes on repairs to brake system   AH42.00-P-0003-01A
1 Remove wheels IMPORTANT Position the front support plates of the vehicle lift as far as possible upwards, position the rear support plates as far as possible downwards and secure the vehicle to prevent it from slipping or toppling. AR40.10-P-1100MCU
2 Remove dust caps from the brake bleeder valves    
3 Lower vehicle with vehicle lift    
4 Remove maintenance flap    
5 Unscrew cap of brake fluid reservoir (1)    
6 Connect brake fluid changer to brake fluid reservoir (1) and apply the specified pressure to the brake system IMPORTANT Observe the operator's manual for the brake fluid changer.
Brake fluid change unit		  
REFER TO CAPACITIES & SPECIFICATIONS General brake fluid Sheet 330.1 DOT 4. See GENERAL BRAKE FLUID (https://bevo.mercedes-benz.com/index.php?language_id=1)
REFER TO CAPACITIES & SPECIFICATIONS Brake fluids (DOT 4 plus) Sheet 331.0 MB 331.0 brake fluid A 000 989 08 07
  Bleed primary circuit     
7 Connect hose of the brake fluid receptacle to the brake bleeder valve of the right wheel brake cylinder (3) and open the brake bleeder valve IMPORTANT Only close the brake bleeder valve when the brake fluid escapes free of bubbles and without contaminants (light color of brake fluid).
A second person is needed who assists the brake fluid changer by slowly pumping on the brake pedal.
TORQUE SPECIFICATION		 *BA42.10-P-1001-08C 
8 Carry out the bleeding process on the left wheel brake cylinder (3), on the right brake caliper (2) and on the left brake caliper (2) in the same manner IMPORTANT Observe correct sequence.  
    TORQUE SPECIFICATION *BA42.10-P-1001-08C 
    TORQUE SPECIFICATION *BA42.10-P-1002-10A 
9 Check brake pedal travel IMPORTANT In the event of a soft pedal feel or long pedal travel, bleed the secondary circuit of the brake system.  
  Bleed secondary circuit     
10 Connect STAR DIAGNOSIS and bleed the secondary circuit of the brake system IMPORTANT The instructions for secondary circuit bleeding are specified by STAR DIAGNOSIS. A second person is needed who assists the brake fluid changer by slowly pumping on the brake pedal.  
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS and read out fault memory   AD00.00-P-2000-04MCC
11 Disconnect brake fluid changer    
12 Check brake fluid level and correct if necessary    
REFER TO MAINTENANCE Brake system - inspect fluid level   AP42.10-P-4210MCC 
INSTALLING Install     
13 Screw on cap of brake fluid reservoir (1)    
14 Install maintenance flap    
15 Raise vehicle with vehicle lift    
16 Press dust cap onto brake bleeder valve    
17 Mount wheels   AR40.10-P-1100MCU
18 Check brake system for leaks   AR42.10-P-0100-01MCC
BRAKE CYLINDER

Number Designation Model 451.3/4
BA42.10-P-1001-08C Brake bleed valve to rear axle wheel brake cylinder Nm 7
FRONT AXLE FLOATING CALIPER

Number Designation Model 451.3/4
BA42.10-P-1002-10A Brake bleeder valve to brake caliper Nm 7
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