Remove/Install Rear Axle Brake Caliper - AR42.10-P-0080FRX

Model 290 

with code B06 (Silver brake calipers) 

except code B07 (AMG - ceramic brake system) 

Model 290 

with code U69 (Brake calipers painted yellow) 

except code B07 (AMG - ceramic brake system) 

Model 290 

with code U70 (red-painted brake callipers) 

except code B07 (AMG - ceramic brake system) 

Shown on right side of vehicle with code B06 (Brake calipers painted gray) 

Courtesy of MERCEDES-BENZ USA

Shown on right side of vehicle with code B06 (Brake calipers painted gray) 

Courtesy of MERCEDES-BENZ USA

Shown on left brake caliper with code U70 (Brake calipers painted red) 

Courtesy of MERCEDES-BENZ USA

	Risk of accident  when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work.	Before starting the engine, actuate brake pedal several times until pressure is built up and maintained in the brake system.	AS42.50-Z-0002-01A
	Risk of injury.  Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of poisoning  from swallowing brake fluid. Risk of injury  from skin and eye contact with brake fluid	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
Notice	Notes on handling, transport and storage of composite brake disks		AH42.10-P-9406-12LF
Notice	Brake fluid notes		AH42.50-P-0001-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Remove cover over brake fluid reservoir.
2	Clean area around cap of brake fluid reservoir.	Assembly cleaner	*BR00.45-Z-1028-04A
3	Unscrew cap of brake fluid reservoir and suction off some brake fluid.	This prevents the brake fluid reservoir from overflowing when the brake pistons are pushed back.
4	Move brake linings (9) on rear axle into assembly position.		AR42.10-P-1710-01FR
		Do not operate the service brake while "Move to assembly position" is shown. Otherwise the spindle in the brake caliper (1) will be damaged.
		The hood must be closed.
5	Switch off ignition and store transmitter key outside of transmission range (min. 2 m).
6	Remove rear wheel.		AR40.10-P-1102A
7	Unhook electric line (13) from holders.	When removing brake caliper (1) on right.
8	Unhook electric line (14) from holders.
9	Disconnect plug (2) from brakepad wear sensor coupling housing (5).	When removing brake caliper (1) on right.
10	Unscrew screw (4) and hang brakepad wear sensor coupling housing (5) to one side.	When removing brake caliper (1) on right.
11	Release and disconnect electrical plug from electric parking brake actuator motor (M76/1 or M76/2).
12	Remove brake hose (7).		AR42.10-P-0023FRX
13	Remove screws (3).	Guide pin to brake caliper support or bolt for guide pin to brake caliper	*BA42.10-P-1003-12W
14	Remove brake caliper (1) from brake caliper support (11).	The new brake caliper (1) is shipped in prefilled condition and it may not be drained. Otherwise the brake caliper (1) cannot be vented.
15	Remove electric parking brake actuator motor (M76/1, M76/2).	When replacing the brake caliper (1).	AR42.20-P-0600FRX
	Check
16	Check brake caliper (1) and dust boot on brake piston for leak tightness and damage.	If there is a problem, ↓ replace brake caliper (1).
17	Check brake caliper support (11) for damage.	If there is a problem, ↓ Replace brake caliper support (11).	AR42.10-P-0221FRX
18	Check guide pins (12) for damage and ease of movement.	If there is a problem, ↓ Replace brake caliper support (11).	AR42.10-P-0221FRX
19	Remove brake linings (9) and check for wear and condition.
		If there is a problem, ↓ replace brake linings (9).	AP42.10-P-4252I
			AR42.10-P-1710FRX
20	Check brake disk (10) for wear and condition.		AR42.10-P-0120FRX
		If there is a problem, ↓ replace brake disks (10).	AR42.10-P-0240FRX
21	Check brake hose (7) and brake line piece (99) for damage.	The brake line piece (99) of the brake hose (7) must not be bent. A bent brake line piece (99) can lead to functional impairment of the brake system.
		If there is a problem, ↓ replace brake hose (7).
			AR42.10-P-0023FRX
22	Install in the reverse order.
23	Bleed brake system.		AR42.10-P-0010FR
24	Operate brake pedal several times until brake linings (9) make contact with brake disks (10).	Firm resistance should be noticeable at the brake pedal.