Remove/Install Front Axle Brake Caliper - AR42.10-P-0070FRA

Model 257 (except 257.361) 

4-piston fixed-caliper brake 

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

Fig 1: Front Axle Advics 4-Piston Fixed Brake Caliper Components Location Model 257 (Except 257.361 Left Side Shown)

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 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 self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Notes on repairs to Brake system		AH42.00-P-0003-01A
Notice	Notes on handling, transport and storage of composite Brake disks		AH42.10-P-9406-12LF
Notice	Brake fluid notes		AH42.50-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Remove brakepads (2).		AR42.10-P-1610FRA
2	Remove electrical connector of front right brakepad wear sensor from Brake caliper (1).	When removing Brake caliper (1) on right side of vehicle.
		Bolt, Brake wear sensor to Brake caliper	*BA42.10-P-1002-10X
3	Remove Brake hose (4).		AR42.10-P-0026FR
		Bleed Brake system only after installing brakepads (2).
4	Unscrew bolts (3).	Bolt, Brake caliper/ Brake caliper support to steering knuckle	* BA42.10-P-1001-10X
5	Remove Brake caliper (1).
	Check
6	Check Brake caliper (1) and dust boots of Brake pistons for leak tightness and damage.	In the event of a problem, ↓ Replace Brake caliper (1). The new Brake caliper (1) is shipped in prefilled condition and it may not be drained. Otherwise the Brake caliper (1) cannot be vented.
7	Check Brake disk for wear and condition.		AR42.10-P-0120FR
		In the event of a problem, ↓ Replace Brake disks.
			AR42.10-P-0220FR
8	Install in the reverse order
9	Bleed Brake system.		AR42.10-P-0010FR
10	Operate Brake pedal several times until the brakepads (2) make contact with the Brake disks.	Firm resistance should be noticeable at the Brake pedal.
	Check
11	Check and correct Brake fluid level in Brake fluid expansion reservoir.
			AP42.10-P-4210B
12	Perform Brake test on test stand.
			AP42.00-P-4290BA