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

Model 118, 177, 243, 247 

Shown on model 177.0 on left side of vehicle 

Fig 1: Rear Axle Brake Caliper Components Location - Model 118 (Shown On Model 177.0)

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 injury  . Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	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 threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notice	Brake fluid notes		AH42.50-P-0001-01A
Notice	Notes on externally invisible brake fluid loss		AH42.10-P-9406-02A
Notice	Notes on repairs to brake system		AH42.00-P-0003-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Move rear axle brake pads into assembly position.	Do not depress the service brake during "Move to assembly position". Otherwise, the spindle in the brake caliper (1) can be damaged.	AR42.10-P-1710-02MFA
2	Release and disconnect electrical connector (2) from left electric parking brake actuator motor (M76/1) or right electric parking brake actuator motor (M76/2).
3	Remove brake hose (4).	Replace brake hose (4). Always replace brake hose (4) after removal.	AR42.10-P-0013MFA
4	Unscrew screws (3) and remove brake caliper (1).	Bolt, guide pin to brake caliper	*BA42.10-P-1002-12X
5	Remove left electric parking brake actuator motor (M76/1) or right electric parking brake actuator motor (M76/2) from brake caliper (1).	When replacing the brake caliper (1).
			AR42.20-P-0600MFA
	Check
6	Check brake caliper (1) for damage.	If there is a problem, ↓ replace brake caliper (1).
7	Check dust boot at brake piston for damage.	If there is a problem, ↓ replace brake caliper (1).
8	Check brake pads for wear and condition.
		Model 243	AP42.10-P-4252K
		Model 247	AP42.10-P-4252MFB
		Model 177	AP42.10-P-4252MFA
		Model 118 If there is a problem, ↓ replace brake linings.	AP42.10-P-4252CLA
			AR42.10-P-1710MFA
9	Check brake caliper support (5) for damage.	If there is a problem, ↓ Replace brake caliper support (5). Bolt, brake caliper to wheel carrier	*BA42.10-P-1001-12X
10	Check brake disk for wear and condition.
		Model 243	AP42.10-P-4256C
		Model 118, 177, 247	AP42.10-P-4256EW
		If there is a problem, ↓ replace brake disks and brake pads in sets. Brake disk	AR42.10-P-0220MFA
		Rear axle brake linings	AR42.10-P-1710MFA
11	Install in the reverse order.
12	Operate brake pedal several times until the brake pads contact the brake disks.	Firm resistance should be noticeable at the brake pedal.
13	Perform brake test on test stand.
		Model 243	AP42.00-P-4290EQ
		Model 118, 177, 247	AP42.00-P-4290BA