Removing, checking and installing rear axle brake pads - AR42.10-P-1700TX

MODEL 219.322/354/356/357/372/375

Fig 1: Identifying Rear Axle Brake Pads Remove/Install Components

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

23.9.08

Coat brake paste, added

Step 13

	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
	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
1	Open brake fluid reservoir and extract some brake fluid	In order to prevent the brake fluid reservoir from overflowing when pressing back the brake pistons.
1	Open brake fluid reservoir and extract some brake fluid		*BA42.50-P-1001-01D
2	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.
3	Remove rear wheels
	Remove/install wheels, rotate if necessary		AP40.10-P-4050TX
4	Remove brake pad contact sensor (S10/4)	Replace defective brake pad contact sensor (S10/4).
	Notes on installing brake pad wear sensor contact sensors		AH42.10-P-0003-01A
5	Pry off clamp (31h)
6	Remove guide pin (31c)	Replace guide bolts (31c).
6	Remove guide pin (31c)		*BA42.10-P-1003-12B
7	Remove brake caliper (31) with inner brake pad (31g)	Attach brake caliper (31) to vehicle free of tension. Do not kink or tension brake hose, as otherwise it will be damaged.
8	Remove brake pads (31g)	Brake pads (31g) 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. Only the brake pads (31g) approved by Mercedes-Benz may be built-in as a set. Insert inner brake pad (31g) with riveted- on spring in brake piston, insert outer brake pad (31g) in brake caliper support (31n).
	Checking
9	Check brake pad thickness and brake disks	Only replace brake pads (31g) and brake disks in complete sets if necessary.
	Check brake lining thickness		AP42.10-P-4253A
	Inspect condition of brake disks		AP42.10-P-4258TX
10	Check brake caliper (31) for leaks and dust boot (31m) for damage and correct seat	In the event of a leaky brake caliper (31) or damaged or incorrectly seated dust boot (31m): ↓
10		Replace brake caliper (31).	AR42.10-P-0080TX
11	Press back brake piston using resetting device (01)	If brake pads (31g) have been removed from several brake calipers, secure their brake pistons beforehand with wedges to prevent them from falling out. If the brake piston is difficult to move:↓
		Replace brake caliper (31).	AR42.10-P-0080TX
			Figure
			Figure
	Clean
12	Clean contact surfaces of brake pads (31g) on brake caliper (31) and brake caliper support (31n)	Do not use any sharp-edged or pointed tools to prevent damage.
13	Coat brake paste	Only use the brake paste listed in the linked description and only coat this on the specified points otherwise noise complaints or damage to the brake system may occur	AR42.10-P-0161-01B
13	Coat brake paste	MB Plastilube brake paste (brownish)	*BR00.45-Z-1084-06A
14	Install in the reverse order
15.1	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
15.2	Operate the brake pedal several times until the brake pads (31g) contact the brake disks	Vehicles with Adaptive Brake (ABR) Firm resistance should be noticeable at the brake pedal.
16	Check fluid level in the brake fluid reservoir, correct if necessary
	Brake system - inspect fluid level		AP42.10-P-4210TX