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

Model 217, 222

Courtesy of MERCEDES-BENZ USA

Shown on MODEL 222 - right side of vehicle

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 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
	Notes on installing brake wear indicator contact sensors		AH42.10-P-0003-01CW
	Remove/install
1	Move brake pads (10) of the rear axle into assembly position	Do not depress the service brake during "Move to assembly position" procedure. Otherwise, the spindle in the brake caliper (3) will be damaged. The engine hood must be closed.	AR42.10-P-1700-02W
2	Switch off ignition and remove transmitter key
	Clean
3	Clean area surrounding the cap of the brake fluid expansion reservoir	Assembly cleaner	*BR00.45-Z-1028-04A
4	Unscrew the cap on the brake fluid expansion reservoir and suction off some brake fluid	This prevents the brake fluid expansion reservoir from overflowing when the brake pistons are pushed back.
5	Detach corresponding complete wheel		AR40.10-P-1102A
6	Disconnect right rear brake wear sensor electrical connector (S10/4x1) from right rear brake wear sensor (S10/4)	When removing brake caliper (3) on right side of vehicle.
7	Remove bolt (4) and remove electrical connector of the right rear brake pad wear sensor (S10/4x1)	When removing brake caliper (3) on right side of vehicle.
		Screw/bolt, brake wear sensor to brake caliper	*BA42.10-P-1003-12J
8	Unhook electric line (16) from right electric parking brake actuator motor (M76/2)	When removing brake caliper (3) on right side of vehicle.
9	Detach electrical connection from left electric parking brake actuator motor (M76/1) or right electric parking brake actuator motor (M76/2)	When replacing brake caliper (3).
10	Remove bolt (1)	Counterhold guide pin (5).
		Guide pin to brake caliper support or bolt for guide pin to brake caliper	*BA42.10-P-1004-12J
11	Remove brake hose (6)	When replacing brake caliper (3). Seal the connections immediately using suitable stop plugs. Otherwise adjacent components will be damaged by escaping brake fluid; if too much brake fluid escapes, this will cause problems when bleeding.	AR42.10-P-0013LF
		Record plug	Fig 2
12	Detach brake caliper (3) from brake caliper support (2)	: Guide the right rear brake wear sensor (S10/4) through the opening of the brake caliper (3).
13	Press back brake piston using pusher tool (01)	When reusing brake caliper (3).
		Resetting device If brake piston is sluggish ↓ Replace brake caliper (3)	Fig 1
14	Remove left electric parking brake actuator motor (M76/1) or right electric parking brake actuator motor (M76/2) from the brake caliper (3)	When replacing brake caliper (3).	AR42.20-P-0600LF
15	Remove brake lining (10) from brake caliper support (2)	When removing the brake caliper support (2). : Only sets of brake linings (10) approved by Mercedes-Benz may be installed. Do not apply brake paste or lubricants to the brake linings (10) and brake calipers (3).
16	Pull right rear brake lining wear sensor (S10/4) out of brake lining (10)	When replacing brake linings (10) on right side of vehicle. : Replace defective right rear brake lining wear sensor (S10/4).
17	Remove spring steel sheets (11) from brake caliper support (2)	When removing the brake caliper support (2).
18	Remove bolts (15) and remove brake caliper support (2)	When removing the brake caliper support (2).
		Bolt, brake caliper/brake caliper support to wheel carrier	*BA42.10-P-1001-12J
	Check
19	Check brake caliper (3) and dust boot (13) on brake piston for damage	If damage is present ↓ Replace brake caliper (3)
20	Check boots (12) for damage and correct seat	If damage is present ↓ Replace brake caliper support (2)
21	Check guide pin (5) for ease of movement	If damage is present ↓ Replace brake caliper support (2)
	Clean
22	Clean contact surfaces of brake linings (10) or brake caliper (3) and on brake caliper support (2)	Do not use sharp-edged or pointed objects. The dust boot (13) or bellows (12) can otherwise be damaged.
		Assembly cleaner	*BR00.45-Z-1028-04A
23	Install in the reverse order
	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
24	Depress brake pedal several times until brake pads (10) rest against brake disks (9)	Firm resistance should be noticeable at the brake pedal.
	Check
25	Check fluid level in brake fluid expansion reservoir
			AP42.10-P-4210HA
26	Carry out brake test on the test stand
			AP42.00-P-4290BA