Remove/check/install front axle brake pads - AR42.10-P-1600RA

MODEL 211.076 /077 /276 /277

MODEL 230.472 /474 /476 /477 /479

Shown on 8-piston fixed caliper

Fig 1: Identifying Front Axle Brake Pads Components - Shown On 8-Piston Fixed Caliper

Courtesy of MERCEDES-BENZ USA

Shown on 6-piston fixed caliper

Fig 2: Identifying Front Axle Brake Pads Components - Shown On 6-Piston Fixed Caliper

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury caused by body parts being jammed or crushed. Risk of injury to skin and eyes caused by brake fluid spraying out at high pressure when working on the SBC brake system	Deactivate SBC brake system using STAR DIAGNOSIS.	AS42.46-Z-0001-01A
	Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes.	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 injury to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
1	Lower brake fluid level in brake fluid reservoir down to "MIN" mark	In order to prevent the expansion reservoir overflowing when pressing back the brake pistons.
			*BA42.50-P-1001-01D
	Checking
2	Check brake lining thickness and brake disks	Replace brake pads (43) and brake disks in complete sets if necessary.
	Check brake lining thickness		AP42.10-P-4253A
	Inspect condition of brake disks		AP42.10-P-4258R
3	Deactivate SBC brake system using STAR DIAGNOSIS.	Vehicles with Sensotronic Brake Control (SBC)
		The following steps should be run through in STAR DIAGNOSIS:
		Select menu item "SBC-Sensotronic Brake Control"/"Deactivate 'SBC' system".
		Then process all the individual steps from top to bottom.
4	Detach brake pad contact sensor (S10/1, S10/2) on connector (S10/1x1, S10/2x1)
5	Detach brake pad contact sensor connector (S10/1x1, S10/2x1) from fixed brake caliper (31a)	Model 211
		Model 211	*BA42.10-P-1003-10H
		Model 230	*BA42.10-P-1003-10B
6	Drive out retaining pins (41) using punch and remove retaining springs (31d)	Installation: Knock retaining pins (41) all the way in. Ensure that retaining springs (31d) are correctly seated.
7	Remove bolt (30) and detach retaining spring support (33)	Model 211 with 6-piston fixed calipers
		Model 211	*BA42.10-P-1005-10H
8	Pull brake pads (43) out of fixed caliper (31a)	Brake pads (43) are to 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.
		Installation: Do not use any sharp-edged or pointed tools for cleaning the brake pad guides. Install front axle brake pads (43) ungreased. The marking on the brake pads (43) must point in the direction of rotation of the wheel during forward travel.
		Only complete sets of brake pads (43) approved by Mercedes-Benz may be installed.
9	Pull brake pad contact sensor (S10/1, S10/2) out of the pad backing plate of the brake pads (43)	Installation: Replace defective brake pad contact sensor (S10/1, S10/2).
	Notes on installing brake pad wear sensor contact sensors		AH42.10-P-0003-01A
10	Check fixed brake caliper (31a) for leaktightness and dust boots of brake pistons for damage and correct seating	If fixed caliper (31a) is leaky or dust boot is damaged or not seated correctly: ↓
		Install new fixed brake caliper (31a).	AR42.10-P-0070RA
11	Turn back brake piston in pairs using pusher tool	Secure the remaining pairs of brake pistons (31a) beforehand using wedges to prevent them from falling out. If the brake pads (43) of several brake calipers are removed, their brake pistons must also be secured to prevent them from falling out.
		Do not fit the pusher tool (031) to the brake disk, but rather push back the opposite brake pistons simultaneously.
		If the brake piston is difficult to move: ↓
		Install new fixed brake caliper (31a).	AR42.10-P-0070RA
			Figure
			Figure
	Clean
12	If necessary, clean the perforation of brake disks		AR42.10-P-2260-01I
13	Install in the reverse order
14.1	Activate SBC brake system using STAR DIAGNOSIS	Vehicles with Sensotronic Brake Control (SBC)
		The following steps should be run through in STAR DIAGNOSIS:
		Select the menu item "SBC-Sensotronic Brake Control"/"Initial startup after repair"/"Remove/install brake pads".
		Then process all the individual steps from top to bottom.
	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 engine, actuate brake pedal several times until the pressure is built up and maintained in the brake system.	AS42.50-Z-0002-01A
14.2	Operate the brake pedal several times until the brake pads (43) contact the brake disks	Vehicles with Adaptive Brake (ABR)
		Firm resistance should be noticeable at the brake pedal.
	Checking
15	Check brake fluid level, correct if necessary
	Brake system - inspect fluid level		AP42.10-P-4210Z