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

Model 463.234

as of model year 2013 up to model year 2019

with code ZQ0 (G 500 4x42)

Model 463.255

as of model year 2013 up to model year 2019

with code MUK2 (USA or Canada vehicle model designation)

with code ZQ0 (G 500 4x4 ² )

Model 463.274

as of model year 2013 up to model year 2019

with code LQ0 (G650 Landaulet)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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
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	Lift/jack up vehicle		AR00.60-P-1000G
4	Remove rear wheels
			AP40.10-P-4050G
	Check
5	Check break pads (1) and brake discs (2)	Always replace break pads (1) and brake discs (2) as a set, if necessary.
		Brake pad wear limit, disk brake	*BE42.10-P-1001-10A
6	Disconnect electrical connector of rear right brake pad wear sensor (S10/4)	When removing the brake pads (1) on the right-hand side of the vehicle
7	Detach retaining spring from brake caliper
8	Pry off and remove protective caps (3) from boots (4)
9	Remove guide pins	Bolt, pilot bushing/guide pin to brake caliper support	*BA42.10-P-1002-17B
10	Remove brake caliper (5)	Do not subject brake hoses (6) to tensile loads or kink. To relieve stress on the brake hose (6), fasten brake caliper (5) to vehicle free of tension. Otherwise the brake hose (6) will be damaged
11	Take out break pads (1)	break pads (1) must be disposed of as special waste. The local authorities can provide information regarding whether disposal is also permitted as industrial waste similar to domestic waste. Only break pads (1) approved by Mercedes-Benz may be installed as a set. Insert inner brake pad (1) with riveted-on spring in brake piston. Insert outer brake pad (1) into brake caliper support (7) and mount brake caliper (5). Do not apply brake pastes or lubricants to the break pads (1) and brake calipers (5)!
12	Pull rear right brake pad wear sensor (S10/4) out of brake pad (1)	When removing the brake pads (1) on the right-hand side of the vehicle Replace defective or seized rear right brake pad wear sensor (S10/4).
	Check
13	Check brake caliper (5) for leak tightness	In the event of leakage ↓ Replace brake caliper (5).
			AR42.10-P-0080GWX
14	Check dust boots of brake pistons	If damage is present ↓ Replace brake caliper (5).
			AR42.10-P-0080GWX
15	Press back brake piston using resetting device	Do not position pusher tool on brake disc (2). Otherwise, there may be damage to the brake system. The brake caliper (5) must be replaced: ↓
		Resetting device With sluggish brake pistons ↓ Replace brake caliper (5).	Fig 1
			AR42.10-P-0080GWX
	Clean
16	Clean contact surfaces of break pads (1) in brake caliper (5) using rags	Do not damage dust boots on brake piston. Do not use sharp-edged or pointy tools. Otherwise, the brake caliper (5) will be damaged.
		Assembly cleaner	*BR00.45-Z-1028-04A
17	Install in the reverse order
18	Depress brake pedal several times until break pads (1) make contact with brake discs (2) and firm resistance is noticeable
	Check
19	Correct fluid level in brake fluid reservoir
20	Check function and effectiveness of brake system