Remove/Check/Install Rear Axle Brake Pads - AR42.10-P-1710S

Model 223

MODIFICATION NOTES

22.03.2022	Document revised.
12.10.2023	Screw, brake caliper/brake caliper support to wheel carrier	Model 223 with code Z07	BA42.10-P-1001-12Y

Courtesy of MERCEDES-BENZ USA

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 threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Notes on handling, transport and storage of composite brake disks		AH42.10-P-9406-12LF
Notice	Notes on handling, transport and storage of ceramic brake disks		AH42.10-P-9406-13A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Brake fluid notes		AH42.50-P-0001-01A
Notice	Notes on repairs to brake system		AH42.00-P-0003-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Remove cover over brake fluid reservoir.	Install cover only after checking brake fluid level.
2	Clean area around cap of brake fluid reservoir.	Assembly cleaner	*BR00.45-Z-1028-04A
3	Remove 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 (3) to assembly position.		AR42.10-P-1710-01S
5	Remove rear wheels.		AR40.10-P-1102A
6	Pull brake lining wear sensor out of backing plate of brake lining (3).	When removing brakepad (3) or right rear brakepad wear sensor.
7	Unscrew screw (7) and fold brake caliper (6) upward.	Guide pin to brake caliper support or bolt for guide pin to brake caliper	*BA42.10-P-1004-12Y
8	Remove brake linings (3) from brake caliper support (2).
9	Remove retaining springs (5).
	Check
10	Check brake pads (3) for wear and condition.
		If there is a problem, ↓ replace brake linings (3) in sets.	AP42.10-P-4252HH
11.1	Check brake disk (1) for condition and wear.	Model 223 except code B07 (AMG - ceramic brake system)
		Only sets of brake disks (1) approved by Mercedes-Benz may be installed. If there is a problem, ↓ replace brake disks (1).	AP42.10-P-4256A
			AR42.10-P-0240S
11.2	Check brake disk (1) for condition and wear.	Model 223 with code B07 (AMG - ceramic brake system)
		Only sets of brake disks (1) approved by Mercedes-Benz may be installed. If there is a problem, ↓ replace corresponding brake disk (1).	AR42.10-P-0270RG
			AR42.10-P-0240S
12	Check guide pins (4) for damage and ease of movement.	If there is a problem, ↓ Replace brake caliper support (2).
		Screw, brake caliper/brake caliper support to wheel carrier	*BA42.10-P-1001-12Y
13	Check brake caliper (6) and dust boots of brake pistons for leak tightness and damage.	If there is a problem, ↓ replace brake caliper (6).
			AR42.10-P-0080S
14	Press back brake pistons all the way using pusher tool.	Resetting device If the brake piston is sluggish, ↓ replace brake caliper (6).	Fig 1
			AR42.10-P-0080S
	Clean
15	Clean contact surfaces of brake linings (3) on brake caliper support (2) (arrow) and on brake caliper (6).	Do not use sharp-edged or pointed objects. Otherwise the brake caliper (6), the dust boot on the brake piston, or the brake caliper support (2) may be damaged.
		Assembly cleaner	*BR00.45-Z-1028-04A
16	Install in the reverse order.
	Concluding tasks
17	Operate brake pedal several times until brake pads (3) make contact with brake disks (1).	Firm resistance should be noticeable at the brake pedal.
18	Check/correct brake fluid level in brake fluid reservoir.
			AP42.10-P-4210G
	Risk of death caused by limbs being caught or crushed by rotating parts when performing tests on the brake test stand	Never leave the vehicle unattended on the rollers except in an emergency. Ensure that no one is under the vehicle or near rotating parts during testing. In case of emergency, use the EMERGENCY OFF switch to shut down test stand.	AS42.00-Z-0001-01A
19	Perform brake test on test stand.
			AP42.00-P-4290BS