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

Model 167 

Fig 1: Rear Axle Brake Caliper Components Location - Model 167 (Shown On Right Side)

Courtesy of MERCEDES-BENZ USA

Shown on right side of vehicle on model 167.1 

Shown on right side of vehicle on model 167.1 except code 489 (AIRMATIC) 

Courtesy of MERCEDES-BENZ USA

	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 externally invisible brake fluid loss		AH42.10-P-9406-02A
Notice	Notes on handling, transport and storage of composite brake disks		AH42.10-P-9406-12LF
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notice	Notes on repairs to brake system		AH42.00-P-0003-01A
Notice	Brake fluid notes		AH42.50-P-0001-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Notes on installing brake hoses		AH42.10-P-9406-01A
	Notes on installing brake wear indicator contact sensors		AH42.10-P-0003-01CW
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Move brakepads (9) on rear axle into assembly position.		AR42.10-P-1710-01ME
		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.
2	Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).
3	Remove cover above brake fluid expansion reservoir.		AR83.10-P-1411ME
4	Clean area around cap on brake fluid expansion reservoir.	Before opening the brake system, the area surrounding the connecting point must be clean. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the brake system.
		Assembly cleaner	*BR00.45-Z-1028-04A
5	Unscrew cap of expansion reservoir for brake fluid and drain off some brake fluid using suitable means.	This prevents the expansion reservoir for brake fluid from overflowing when the brake pistons are pushed back.
6	Remove right or left rear wheel and tire assembly.		AR40.10-P-1102ME
7	Release and disconnect electrical connector (2) from rear right brakepad wear sensor (S10/4).	On the right side of the vehicle.
8	Unscrew screw (4) and place coupling housing (2) of rear right brakepad wear sensor (S10/4) to one side.	On the right side of the vehicle.
		Screw/bolt, feed line for brake pad contact sensor to brake caliper	*BA42.10-P-1007-12L
9	Release and disconnect electrical connector a left electric parking brake actuator motor (M76/1) or right electric parking brake actuator (M76/2).
10	Clean area surrounding connecting point between brake hose (5) and brake caliper (1).	Before opening the brake system, the area surrounding the connecting point must be clean. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the brake system.
		Assembly cleaner	*BR00.45-Z-1028-04A
11	Remove brake hose (5) from brake caliper (1) and seal exposed connections using suitable stop plugs.	Seal connections immediately to prevent damage caused by escaping brake fluid. The brake caliper (1) must not run empty. Otherwise, the brake caliper (1) must be replaced. Do not twist brake hose (5) and ensure that it is routed correctly. Otherwise the brake hose (5) will get damaged.
		Collect escaping brake fluid with suitable container.
		Brake hose to brake caliper	*BA42.10-P-1001-04J
		Record plug	Fig 2
12	Remove screw/bolts (3).	Screw/bolt, brake caliper to guide pin	*BA42.10-P-1004-12L
13	Remove brake caliper (1) from brake caliper support (11).	A new brake caliper (1) is shipped prefilled and must not be emptied. Otherwise the brake caliper (1) cannot be vented. Do not twist brake hose (5) and ensure that it is routed correctly. Otherwise the brake hose (5) will get damaged.
14	Remove left electric parking brake actuator motor (M76/1) or right electric parking brake actuator motor (M76/2).	If brake caliper (1) is replaced:
			AR42.20-P-0600ME
	Check
15	Check brake caliper (1) and dust boot on brake piston for leak tightness and damage.	If there is a problem, ↓ Replace brake caliper (1).
16	Check brake caliper support (11) for damage.	If there is a problem, ↓ Replace brake caliper support (11).
			AR42.10-P-0221ME
17	Check guide pins (12) for damage and ease of movement.	If there is a problem, ↓ Replace brake caliper support (11).
			AR42.10-P-0221ME
18	Check brakepads (9) for wear and condition.
			AP42.10-P-4252J
		If there is a problem, ↓ Replace brakepads (9).
			AR42.10-P-1710ME
19	Check brake disk (10) for wear and condition.
			AP42.10-P-4256EW
		If there is a problem, ↓ Replace brake disks (10).
			AR42.10-P-0240ME
	Clean
20	Clean contact surfaces of brakepads (9) at brake caliper (1) and at brake caliper support (11) using suitable means.	When doing so, do not damage boots of brake pistons and guide pins (12). Otherwise the brake caliper (1) or brake caliper support (11) must be replaced.
21	Install in the reverse order.
	Concluding tasks
22	Bleed brake system.		AR42.10-P-0010ME
	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
23	Operate brake pedal several times until brakepads (9) make contact with brake disks (10).	Firm resistance should be noticeable at the brake pedal.
24	Perform brake test on test stand.
			AP42.00-P-4290BA

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA