Remove/Check/Install Front Axle Brake Pads - AR42.10-P-1610LWQ

Model 238 (except 238.361/461) 

Advics 4-piston fixed-caliper brake 

Model 238 (except 238.361/461) 

Brembo 4-piston fixed-caliper brake 

Shown on Brembo 4-piston fixed-caliper brake, on left side of vehicle 

Fig 1: Front Axle Brake Pads Components Location - Model 238 (Except 238.361/461) With Brembo 4-Piston Fixed-Caliper

Courtesy of MERCEDES-BENZ USA

Fig 2: Front Axle Brake Pads Components Location - Model 238 (Except 238.361/461) With Advics 4-Piston Fixed-Caliper

Courtesy of MERCEDES-BENZ USA

Shown on Advics 4-piston fixed-caliper brake, on left side of vehicle 

	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
	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
Topical note	Notes on handling, transport and storage of composite brake disks		AH42.10-P-9406-12LF
Topical note	Notes on repairs to brake system		AH42.00-P-0003-01A
Topical note	Brake fluid notes		AH42.50-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove
1	Remove cover above brake fluid expansion reservoir.
2	Clean area around cap on brake fluid expansion reservoir.	Assembly cleaner	*BR00.45-Z-1028-04A
3	Unscrew cap on brake fluid expansion reservoir and suction off some brake fluid.	This prevents the expansion reservoir overflowing when the brake piston (5) is pushed back.
4	Remove front wheels.		AR40.10-P-1102A
5	Expose electric line of front right brakepad wear sensor and disconnect electrical connector.	Pay attention to the routing of the electric line of the right front brakepad wear sensor.
6	Unhook safety spring (6) from bolt (1) and remove.	Model 238 (except 238.361/461) Advics 4- piston fixed-caliper brake
7	Drive out bolts (1) using a punch and remove retaining spring (2).
8	Release brakepads (3) from brake pistons (5).	Model 238 (except 238.361/461) Brembo 4- piston fixed-caliper brake The brake linings (3) are bonded and must be replaced due to the loosened bonding.
9	Remove brakepads (3).
10	Pull front right brakepad wear sensor out of backing plate of brakepad (3).	When replacing the brake linings (3) or replacing the right front brake wear sensor. Pay attention to the installation location of the right front brakepad wear sensor.
	Check
11	Check bolts (1) and retaining spring (2) for damage and condition.	If there is a problem, ↓ Replace pin (1) or retaining spring (2).
12	Check condition of soundproofing panels (7, 8 and springs (9).	Model 238 (except 238.361/461) Advics 4- piston fixed-caliper brake If there is a problem, ↓ Replace brakepads (3). Only brakepads (3) approved by Mercedes-Benz may be installed, and only as complete sets.
13	Check brakepads (3) for wear and condition.	Model 238 (except 238.361/461) Advics 4- piston fixed-caliper brake
		If there is a problem, ↓ Replace brakepads (3). Only brakepads (3) approved by Mercedes-Benz may be installed, and only as complete sets.	AP42.10-P-4252F
14	Check brake disk for wear and condition	Replace brake disks as a complete set only. If there is a problem, ↓ Replace brake disks.	AR42.10-P-0120LWO
			AR42.10-P-0220LWO
15	Check brake caliper (4) with detachable parts for damage.	If there is a problem,
		↓ replace corresponding component parts.	AR42.10-P-0070LWQ
16	Press back brake pistons (5) using pusher tool.	Secure remaining brake piston (5) using two wedges against slipping out. Wedge	Fig 4
		Resetting device If the brake pistons (5) can only move sluggishly: ↓ replace brake caliper (4).	Fig 3
			AR42.10-P-0070LWQ
	Install
17	Clean contact surfaces of brakepads (3) on brake caliper (4) and brake pistons (5).	Do not use sharp-edged or pointed objects. Otherwise, the brake caliper (4) or the dust boots of the brake piston (5) may be damaged. Model 238 (except 238.361/461) Brembo 4-piston fixed-caliper brake Adhesive residue must always be completely removed from the contact surfaces on the brake piston (5). Assembly cleaner	*BR00.45-Z-1028-04A
18	Insert front right brakepad wear sensor into backing plate of brakepad (3).	When replacing the brake linings (3) or replacing the right front brake wear sensor.
19	Apply brake paste to brake caliper (4).	Model 238 (except 238.361/461) Advics 4- piston fixed-caliper brake	AR42.10-P-0163-01LW
		MB Plastilube brake paste (brownish)	*BR00.45-Z-1084-06A
20	Remove protective foils from bonding surfaces of brake linings (3).	Model 238 (except 238.361/461) Brembo 4- piston fixed-caliper brake
21	Apply brake paste to brakepads (3).	The brake paste to be used depends on the manufacturer of the brake caliper.	AR42.10-P-0162-01LWO
		MB brake paste Molykote (copper colored)	*BR00.45-Z-1057-06A
		MB Plastilube brake paste (brownish)	*BR00.45-Z-1084-06A
22	Insert brakepads (3).	Model 238 (except 238.361/461) Advics 4-piston fixed-caliper brake Ensure that soundproofing panels (7, 8) and springs (9) are in the correct installation position. The arrows (arrows) when installed must face towards the direction of rotation for the brake disk, and the springs (9) must be mounted to the underside of the brake linings (3). Only brakepads (3) approved by Mercedes-Benz may be installed, and only as complete sets.
23	Insert retaining spring (2) and pound bolts (1) in up to end stops.	Check retaining spring (2) is correctly seated.
24	Hook safety spring (6) into bolt (1).	Model 238 (except 238.361/461) Advics 4- piston fixed-caliper brake
25	Connect electrical connector of front right brakepad wear sensor.
26	Install front wheels.		AR40.10-P-1102A
27	Operate brake pedal several times until the brakepads (3) make contact with the brake disks.	Firm resistance should be noticeable at the brake pedal.
	Check
28	Check and correct brake fluid level in expansion reservoir.
			AP42.10-P-4210B
29	Perform brake test on test stand.
			AP42.00-P-4290BA

Fig 3: Identifying Resetting Device (000 589 52 43 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Wedge (601 589 07 63 00)

Courtesy of MERCEDES-BENZ USA