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

Model 238 

1-piston floating caliper brake 

Shown on right side of vehicle 

Fig 1: Front Axle Brake Pads Components Location - Model 238 With 1-Piston Floating Caliper (Shown On Right Side)

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 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
Notice	Notes on handling, transport and storage of composite brake disks		AH42.10-P-9406-12LF
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Brake fluid notes		AH42.50-P-0001-01A
Notice	Notes on repairs to brake system		AH42.00-P-0003-01A
	Remove
1	Remove cover above brake fluid expansion reservoir
2	Clean area around cap on expansion reservoir for brake fluid	Assembly cleaner	*BR00.45-Z-1028-04A
3	Unscrew the cap on the brake fluid expansion reservoir and suction off some brake fluid	This prevents the expansion reservoir overflowing when the brake piston is pushed back (7).
4	Remove front wheels		AR40.10-P-1102A
5	Detach electrical line of front right brake wear sensor (S10/2) from bracket (1)	Pay attention to the routing of the electrical line of the right front brakepad wear sensor (S10/2).
6	Detach front right brake wear sensor (S10/2) from electrical connection
7	Unscrew bolt (2)
8	Release outer brake lining (6) from brake caliper (4)	The outer brakepad (6) is bonded and if the bonding is detached, the brakepads (6) must be replaced.
9	Fold back brake caliper (4)	Do not subject the brake hose and electrical line to tension and do not kink them. The brake hose and the electrical line can otherwise be damaged.
10	Remove brakepads (6)
11	Pull right front brake wear sensor (S10/2) from pad backing plate of brake lining (6)	Pay attention to the installation location of the right front brakepad wear sensor (S10/2).
	Check
12	Check brake disk for wear and condition
		Replace brake disks as a complete set only. In event of damage or excessive wear ↓ Replace brake disks.	AP42.10-P-4256EW
			AR42.10-P-0220LWO
13	Check brake caliper (4) with detachable parts for damage	If a problem arises ↓ Replace corresponding components.	AR42.10-P-0070LWO
14	Check brake caliper support (5) for damage	If a problem arises ↓ Replace brake caliper support (5).	AR42.10-P-0222LWO
15	Push back brake piston (7) using pusher tool (01)	Resetting device If the brake piston (7) is sluggish ↓ Replace brake caliper (4).	Fig 2
			AR42.10-P-0070LWO
	Clean
16	Clean contact surfaces of brake linings (6) on brake caliper (4) and on brake caliper support (5)	Do not use sharp-edged or pointed objects. Otherwise, the dust boot, brake caliper (4) or the brake caliper support (5) may be damaged. Adhesive residue must be completely removed from the contact surfaces of the brake caliper (4). Assembly cleaner	*BR00.45-Z-1028-04A
	Install
17	Connect right front brakepad wear sensor (S10/2) to backing plate of brakepad (6)
18	Apply brake paste to brake caliper support (5)		AR42.10-P-0163-01LW
		Brake paste, Varybond	*BR00.45-Z-1072-06A
19	Remove protective foils from bonding surfaces of brakepads (6)
20	Insert brakepads (6)	No brake paste or lubricants must be applied to the brakepads (6). Only sets of brake pads (6) approved by Mercedes-Benz may be installed.
21	Insert brake caliper (4)	No brake paste or lubricants must be applied to the brake calipers (4).
22	Tighten screw (2)	Guide pin to brake caliper support or bolt for guide pin to brake caliper	*BA42.10-P-1004-10X
23	Connect right front brakepad wear sensor (S10/2) to electrical connector
24	Fasten electrical line of right front brakepad wear sensor (S10/2) on bracket (1)
25	Install front wheels		AR40.10-P-1102A
26	Operate brake pedal several times until brakepads (6) contact brake disks
	Check
27	Check and correct brake fluid level in expansion reservoir
			AP42.10-P-4210B
28	Carry out brake test on the test stand
			AP42.00-P-4290BA

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

Courtesy of MERCEDES-BENZ USA