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

Model 257 

1-piston floating caliper brake 

Fig 1: Front Axle 1-Piston Floating Brake Caliper Components Location - Model 257

Courtesy of MERCEDES-BENZ USA

Shown except code 489 (AIR BODY CONTROL) 

	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 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.		AR42.10-P-1610FR
2	Remove bolt (4) and remove electrical connector from front right brakepad wear sensor (5).	When removing Brake caliper (6) on right side of vehicle.
		Bolt, Brake wear sensor to Brake caliper	*BA42.10-P-1002-10X
3	Remove Brake hose (1).		AR42.10-P-0026FR
		Bleed Brake system only after installing brakepads.
4	Remove screw (3).	Guide pin to Brake caliper support or bolt for guide pin to Brake caliper	*BA42.10-P-1004-10X
5	Remove Brake caliper (6).
	Check
6	Check Brake caliper (6) and dust boot on Brake piston for leak tightness and damage.	In the event of a problem, ↓ replace Brake caliper (6).
		The new Brake caliper (6) is shipped in prefilled condition and it must not be drained. Otherwise, the Brake caliper (6) cannot be vented.
7	Check Brake caliper support (7) for damage.	In the event of a problem, ↓ replace Brake caliper support (7).
			AR42.10-P-0222FR
8	Check guide pins of Brake caliper support (7) for damage and ease of movement.	In the event of a problem, ↓ Replace Brake caliper support (7).
			AR42.10-P-0222FR
9	Check Brake disk for wear and condition.	In the event of a problem, ↓ Replace Brake disks.	AR42.10-P-0120FR
			AR42.10-P-0220FR
10	Install in the reverse order
11	Bleed Brake system.		AR42.10-P-0010FR
12	Operate Brake pedal several times until the brakepads contact the Brake disks.	Firm resistance should be noticeable at the Brake pedal.
	Check
13	Check and correct Brake fluid level in Brake fluid expansion reservoir.
			AP42.10-P-4210B
14	Perform Brake test on test stand.
			AP42.00-P-4290BA