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

Model 213.061/261, 238.361/461, 257.361

4-piston fixed-caliper brake

Fig 1: Front Axle 4-Piston Fixed-Caliper Brake Pads Components Location - Model 257.361

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
	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 repairs to Brake system		AH42.00-P-0003-01A
Topical note	Notes on handling, transport and storage of composite Brake disks		AH42.10-P-9406-12LF
Topical note	Brake fluid notes		AH42.50-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove
1	Remove cover over the 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 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	Drive out pin (2) using punch.
7	Remove bolt for tie bar (3).
8	Take out pin for tie bar (6) and remove Retaining spring (5).
9	Remove brakepads (4).
10	Pull front right brakepad wear sensor out of backing plate of brakepad (4).	When replacing the brakepads (4) or replacing the front right Brake wear sensor. Pay attention to the installation location of the right front brakepad wear sensor.
	Check
11	Check pins (2) and Retaining spring (5) for damage and condition.	If there is a problem, ↓ replace pins (2) or Retaining spring (5).
12	Check condition of soundproofing panels of brakepads (4).	If there is a problem, ↓ replace brakepads (4). Only sets of brakepads (4) approved by Mercedes-Benz may be installed.
13	Check brakepads (4) for wear and condition.
		Model 238.361/461 4-piston fixed-caliper brake	AP42.10-P-4252F
		Model 213.061/261 4-piston fixed-caliper brake	AP42.10-P-4252E
		Model 257.361 4-piston fixed-caliper brake	AP42.10-P-4252CLS
		If there is a problem, ↓ replace brakepads (4). Only sets of brakepads (4) approved by Mercedes-Benz may be installed.
14	Check Brake disk for wear and condition.	Model 238.361/461 4-piston fixed-caliper brake	AR42.10-P-0120LWO
		Model 213.061/261 4-piston fixed-caliper brake	AR42.10-P-0120LWG
		Model 257.361 4-piston fixed-caliper brake	AR42.10-P-0120FR
		Replace Brake disks as a complete set only. If there is a problem, ↓ Replace Brake disks.
		Model 238.361/461 4-piston fixed-caliper brake	AR42.10-P-0220LWO
		Model 213.061/261 4-piston fixed-caliper brake	AR42.10-P-0220EWE
		Model 257.361 4-piston fixed-caliper brake	AR42.10-P-0220FR
15	Check Brake caliper (1) with detachable parts for damage.	If there is a problem, ↓ replace corresponding component parts.
			AR42.10-P-0070FRB
16	Press back Brake pistons with pusher tool.	Secure remaining Brake pistons using two wedges against slipping out.
		Resetting device	Fig 2
		Wedge If the Brake pistons can only be moved sluggishly, ↓ replace Brake caliper (1).	Fig 3
			AR42.10-P-0070FRB
	Install
17	Clean contact surfaces of brakepads (4) on Brake caliper (1) and on Brake pistons.	Do not use sharp-edged or pointed objects. The Brake caliper (1) or the dust boots of the Brake pistons can otherwise be damaged.
		Assembly cleaner	*BR00.45-Z-1028-04A
18	Insert front right brakepad wear sensor into backing plate of brakepad (4).	When replacing the brakepads (4) or replacing the front right Brake wear sensor.
19		Ensure soundproofing panels are in correct installation position. Only sets of brakepads (4) approved by Mercedes-Benz may be installed.
20	Insert Retaining spring (5) and install pin for tie bar (6).	Make sure that the Retaining spring (5) is seated correctly.
21	Tighten bolt for tie bar (3).	Tension rod of Brake caliper	*BA42.10-P-1005-10X
22	Insert pin (2) into Brake caliper (1) and the Retaining spring (5) and pound-in up to the end stops.	Make sure that the Retaining spring (5) is seated correctly.
23	Connect plug (7) of electrical connector of front right brakepad wear sensor.
24	Install front wheels.		AR40.10-P-1102A
25	Operate Brake pedal several times until the brakepads (4) make contact with the Brake disks.	Firm resistance should be noticeable at the Brake pedal.
	Check
26	Check and correct Brake fluid level in expansion reservoir.
			AP42.10-P-4210B
27	Perform Brake test on test stand.
			AP42.00-P-4290BA