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

Model 463 (except 463.276/277) as of model year 2019 

Shown on right side of vehicle with 1-piston floating caliper brake 

Fig 1: Front Axle Brake Caliper Components Location - Model 463 As Of Model Year 2019

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
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Remove
1	Open hood.		AR88.40-P-1000XG
2	Clean area around cap of brake fluid expansion reservoir.	Assembly cleaner	*BR00.45-Z-1028-04A
3	Unscrew cap of brake fluid expansion reservoir and extract some brake fluid.	This prevents the expansion reservoir from overflowing when the brake pistons are pushed back. Properly dispose of the extracted brake fluid.
4	Detach left or right wheel and tire assembly from front axle.		AR40.10-P-1102XG
5	Disconnect right front brake pad wear sensor (S10/2) from coupling housing (1).	Only when removing the brake caliper (5) on the right side of the vehicle.
6	Remove screw (2) on coupling housing (1).	Only when removing the brake caliper (5) on the right side of the vehicle.
7	Remove coupling housing (1) together with electrical line and place to one side.	Only when removing the brake caliper (5) on the right side of the vehicle.
8	Remove screws (3) from guide pins (4).
9	Unscrew banjo bolt (7), remove sealing rings and hang brake hose (8) to one side.	Only when replacing the brake caliper (5). Seal openings in brake caliper (5) and brake hose (8) immediately. Otherwise escaping brake fluid will cause damage to adjacent components. The sealing rings of the banjo bolt (7) can be reused.
		Record plug	Fig 3
10	Remove brake caliper (5) from brake caliper support (6).
	Check
11	Check brake pads for wear and condition.	If damage is present or the wear is outside the wear limit, ↓ Replace brake pads.	AP42.10-P-4252G
		Replace brake pads as a complete set only.	AR42.10-P-1610XG
12	Check condition of brake disc and measure degree of wear.	If damage is present or the wear is outside the wear limit, ↓ Replace brake disc.	AP42.10-P-4256EW
		Replace brake discs as a complete set only.	AR42.10-P-0220XG
13	Check brake caliper (5) and dust boot on brake piston for leaktightness and damage.	If leaks or damage is present, ↓ Replace brake caliper (5).
14	Check boots and guide pins (4) for damage and ease of movement.	If there is excessive resistance or damage, ↓ Replace guide pins (4).
15	Check brake caliper support (6) for wear and condition.	If wear or damage is present. ↓ Replace brake caliper support (6).	AR42.10-P-0220XG
16	Check brake hose (8) for leaktightness and damage.	If leaks or damage is present, ↓ Replace brake hose (8).	AR42.10-P-0013XG
	Clean
17	Clean contact surfaces of brake pads on brake caliper (5).	Do not damage the dust boot on the brake piston or the boots. Do not use sharp-edged or pointed objects. Otherwise replace the brake caliper (5).
	Install
18	Push back brake piston using pusher tool back until brake caliper (5) moves freely.	Resetting device	Fig 2
19	Attach brake caliper (5) to brake caliper support (6).
20	Screw brake hose (8) onto brake caliper (5) with banjo bolt (7) and sealing rings.	Only when replacing the brake caliper (5). Install the brake hose free of twists and kinks. Otherwise it cannot be guaranteed that there will be an adequate distance from other axle components in all driving situations. The sealing rings of the banjo bolt (7) can be reused. Bolt, brake hose to floating brake caliper on front axle/rear axle	*BA42.10-P-1012-04B
21	Tighten screws (3) on guide pins (4).	Screw, guide pin to piston housing (floating brake caliper)	*BA42.10-P-1002-10Y
22	Attach coupling housing (1) together with electrical line to brake caliper (5).	Only when installing the brake caliper (5) on the right side of the vehicle.
23	Tighten screw (2) on coupling housing (1).	Only when installing the brake caliper (5) on the right side of the vehicle. Screw, brake pad wear sensor to brake caliper (fixed caliper)	*BA42.10-P-1004-10Y
24	Connect right front brake pad wear sensor (S10/2) to coupling housing (1).	Only when installing the brake caliper (5) on the right side of the vehicle.
25	Attach left or right wheel and tire assembly to front axle.		AR40.10-P-1102XG
	Initial startup
26	Bleed brake system.	Only when replacing the brake caliper (5) or after opening the hydraulic system of the service brake.	AR42.10-P-0010XG
27	Check and correct brake fluid level in expansion reservoir.		AP42.10-P-4210GA
28	Perform brake test.
			AP42.00-P-4290BA

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

Courtesy of MERCEDES-BENZ USA

Fig 3: Idenifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA