Replacing And Installing Brake Pads - AR42.10-P-0170GWV

Model 463 (except 463.234/255/274)

as of model year 2013 up to model year 2019

brake pads on front axle

Shown on model 463 as of model year 2013

Courtesy of MERCEDES-BENZ USA

Shown on model 463 as of model year 2016

Courtesy of MERCEDES-BENZ USA

	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
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Remove/install
1	Open hood		AR88.40-P-1000GG
2	Unscrew cap of brake fluid reservoir and extract some brake fluid	In order to prevent the brake fluid reservoir from overflowing when pressing back the brake pistons.
3	Remove wheel-and-tire assembly
			AP40.10-P-4050G
4	Disconnect front brake wear sensor (8) from electrical connection for front brake wear sensor (9)
5	Pull front brake wear sensor (8) out of holder on spring steel sheet (3)
6	Carefully pull front brake wear sensor (8) out of brake lining (5)	Replace the defective or seized front brake wear sensor (8).
7	Remove screw/bolt (1) and take off support (2) of spring steel sheet (3)	Bolt for anti-rattle spring support	*BA42.10-P-1006-02B
8	Place electrical connection for front brake wear sensor (9) to one side
9	Knock out retaining pins (4) using a drift	It must be ensured that the retaining pins (4) are seated correctly. Replace the retaining pins (4) if necessary
10	Remove spring steel sheet (3)
11	Remove break pads (5) from brake caliper (7)	Only sets of break pads (5) approved by Mercedes-Benz may be installed. Do not apply brake paste or lubricants to the break pads (3) and brake calipers (1).
	Check
12	Check that spring steel sheet (3) and support (2) are not damaged and are in good condition	If a problem arises ↓ Replace spring steel sheet (3) and/or support (2)
13	Check break pads (5) for wear and condition
		Replace the brake linings (5) as a complete set only. In event of damage or excessive wear ↓ Replace break pads (5)	AP42.10-P-4252G
14	Check wear and condition of brake discs (6)
		Replace the brake discs (6) as a complete set only. In event of damage or excessive wear ↓ Replace brake discs (6)	AP42.10-P-4258G
		Model 463 (except 463.234/255/270/271/274) as of model year 2013 up to model year 2019 brake pads on front axle	AR42.10-P-0220GW
		Remove/install brake disc Model 463.270/271 as of model year 2013 up to model year 2019 brake pads on front axle	AR42.10-P-0220GX
15	Check brake caliper (7) and dust boots of brake piston for leaktightness and damage	If a problem arises ↓ Replace brake caliper (7)
16	Press back brake piston using resetting device	Secure remaining brake pistons using two wedges against slipping out.
		Resetting device	Fig 1
		Wedge With sluggish brake pistons ↓ Replace brake caliper (7)	Fig 2
	Clean
17	Clean contact surfaces of brake linings (5) in brake caliper (7)	While doing so, do not damage the dust boots on the brake piston. Do not use sharp-edged or pointy tools. Otherwise the brake caliper (2) will be damaged.
		Cleaner	*BR00.45-Z-1025-04A
18	Install in the reverse order
19	Depress brake pedal several times until brake linings (5) make contact with brake discs (6) and a firm resistance is noticeable
	Check
20	Correct fluid level in brake fluid reservoir
			AP42.50-P-4210G
21	Carry out brake test on the test stand