Remove/install front axle brake caliper - AR42.10-P-0070RK

MODEL 231 

Illustration shows model 231.457 

Fig 1: Front Axle Brake Caliper Remove/Install Components - Shown On Model 231.457

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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
	Notes on handling, transport and storage of ceramic brake disks		AH42.10-P-9406-13A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Brake fluid notes		AH42.50-P-0001-01A
1	Remove brake linings	Model 231.474/479 with code B07 (Ceramic brake system)	AR42.10-P-1600RKK
		Model 231.457 except code 950 (AMG Sports package) Model 231.457 with code 950 (AMG Sports package) Model 231.473 Model 231.474/479 except code B07 (Ceramic brake system)	AR42.10-P-1600RK
2	Unscrew screw/bolt (1) and remove right front brake wear sensor electrical connector (S10/2x1) from brake caliper (2) and expose electrical line (3)	When removing the brake caliper (2) on the right side of the vehicle. MODEL 231 Bolt, brake pad contact sensor to brake caliper	*BA42.10-P-1006-10U
3	Remove brake hose (4) from brake caliper (2)		AR42.10-P-0013RK
4	Remove bolts (5) and remove brake caliper (2)	Replace screw/bolts (5). When tightening with torque make sure that the brake caliper (2) is one with an aluminum thread or a steel bushing. MODEL 231.474/479Bolt, brake caliper support to steering knuckle	*BA42.10-P-1002-10U
		Model 231.457/473Bolt, brake caliper to steering knuckle	*BA42.10-P-1001-10U
	Check
5	Check condition of brake linings and measure degree of wear
		If necessary, replace brake linings: ↓	AP42.10-P-4253A
		Remove/check/install front axle brake pads Model 231.474/479 with code B07 (Ceramic brake system)	AR42.10-P-1600RKK
		Remove/check/install front axle brake pads Model 231.457 except code 950 (AMG Sports package) Model 231.457 with code 950 (AMG Sports package) Model 231.473 Model 231.474/479 except code B07 (Ceramic brake system)	AR42.10-P-1600RK
6	Check condition of brake disk (6) and measure degree of wear
		Model 231 with code B07 (Ceramic brake system)	AP42.10-P-4258QQ
		Model 231 except code B07 (Ceramic brake system) Replace brake disks (6) if necessary: ↓	AP42.10-P-4258RK
		Remove/install brake disc	AR42.10-P-0220RK
7	Check brake caliper (2) and dust boots of brake pistons for leaktightness and damage	If damaged, replace brake caliper (2).
8	Press back brake piston using resetting device	If the brake pistons are sluggish, replace the brake caliper (2). Resetting device	Fig 2
	Clean
9	Clean contact surfaces of brake linings on brake caliper (2)	While doing so, do not damage the dust boots of the brake piston, and do not use any sharp- edged or pointed objects. The brake caliper (2) must otherwise be replaced. Assembly cleaner	*BR00.45-Z-1028-04A
10	Install in the reverse order
	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
11	Operate brake pedal several times until brake linings (6) rest against brake disks	Firm resistance should be noticeable at the brake pedal.
	Check
12	Check fluid level in brake fluid reservoir, and correct if necessary
			AP42.10-P-4210V
13	Carry out brake test on the test stand
			AP42.00-P-4290BA

FRONT AXLE BRAKE CALIPER

Number	Designation				Model 231.457/473
BA42.10-P-1001-10U	Bolt, brake caliper to steering knuckle	with aluminum thread	Stage 1	Nm	80
			Stage 2	∠°	45
		with steel bushing	Stage 1	Nm	150
			Stage 2	∠°	45

FRONT AXLE BRAKE CALIPER

Number	Designation			MODEL 231.474 except CODEB07	MODEL 231.474 with CODE B07
BA42.10-P-1002-10U	Bolt, brake caliper support to steering knuckle	Stage 1	Nm	80	180
		Stage 2	∠°	45	-

FRONT AXLE BRAKE CALIPER

Number	Designation			MODEL 231.479 except CODEB07	MODEL 231.479 with CODE B07
BA42.10-P-1002-10U	Bolt, brake caliper support to steering knuckle	Stage 1	Nm	80	180
		Stage 2	∠°	45	-

FRONT AXLE BRAKE CALIPER

Number	Designation		Model 231.457/473	MODEL 231.474 except CODEB07
BA42.10-P-1006-10U	Bolt, brake pad contact sensor to brake caliper	Nm	8	8

FRONT AXLE BRAKE CALIPER

Number	Designation		MODEL 231.474 with CODE B07	MODEL 231.479 except CODEB07
BA42.10-P-1006-10U	Bolt, brake pad contact sensor to brake caliper	Nm	8	8

FRONT AXLE BRAKE CALIPER

Number	Designation		MODEL 231.479 with CODE B07
BA42.10-P-1006-10U	Bolt, brake pad contact sensor to brake caliper	Nm	8

Fig 2: Identifying Resetting Device (000 589 52 43 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1028-04A	Assembly cleaner	Adolf Wu rth GmbH&Co. KG