Remove/install brake pad on floating brake caliper - AR42.10-P-0160RT

Fig 1: Identifying Front Axle Brake Pad On Floating Brake Caliper Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Front axle

Fig 2: Identifying Rear Axle Brake Pad On Floating Brake Caliper Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Rear axle

MODIFICATION NOTES

23.9.08

Apply brake paste, added

Step 15

	Remove/install
	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.
2	Remove wheels
	Remove/install wheels, rotate if necessary		AP40.10-P-4050RT
3	Disconnect electrical connector of the brake pad contact sensor
	Notes on installing brake pad wear sensor contact sensors		AH42.10-P-0003-01RT
4	Pry off spring steel sheet (1) and remove
5	Remove protective caps (4) and unscrew bolts of guide pins	Install new bolts.
			*BA42.10-P-1002-10L
			*BA42.10-P-1003-12L
6	Remove floating brake caliper (2) with brake pads (3)	Do not tension or kink brake hose. To relieve the load on the brake hose attach the floating brake caliper (2) to the vehicle unstressed, otherwise the brake hose will be damaged.
	Notes on installing brake hoses	Installation: Check the correct routing of the brake hose.	AH42.10-P-9406-01RT
7	Remove brake pads (3) from floating brake caliper (2)	Brake pads (3) 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 brake pads approved by Mercedes-Benz (3) may be fitted in sets.
	Checking
8	Check brake pad thickness and brake disks	Replace brake pads (3) and brake disks in sets if necessary.
	Check brake lining thickness		AP42.10-P-4253A
	Inspect condition of brake disks		AP42.10-P-4258GZ
9	Pull brake pad contact sensor out of the pad backing plate of the brake pad (3) and check	Check for damage, replace contact sensor if necessary.
	Notes on installing brake pad wear sensor contact sensors	Check for damage, replace contact sensor if necessary.	AH42.10-P-0003-01RT
10	Check guide pins and boots	Check guide pins for sluggishness and damage. Check boots for damage and loose seat. Replace damaged parts with new parts.
11	Check floating brake caliper (2)	In the event of a leaky floating brake caliper (2) or damaged dust boot: ↓
		Install new front axle brake caliper.	AR42.10-P-0070RT
		Replace rear axle brake caliper.	AR42.10-P-0080RT
12	Press back brake piston using pusher tool (5)	If the brake piston is difficult to move: ↓
		Install new front axle brake caliper.	AR42.10-P-0070RT
		Replace rear axle brake caliper.	AR42.10-P-0080RT
			Fig 3
13	Check fall of the dust boot	If the dust boot projects beyond the brake piston, position the dust boot correctly.
	Clean
14	Clean the contact surfaces of brake pads (3) on floating brake caliper (2) and floating caliper carrier with a rag	In the process do not damage the dust boot and boots. Do not use any sharp-edged or pointed tools to prevent damage.
14		Cleaner from package	*BR00.45-Z-1028-04A
15	Apply brake paste	Except model 251.077/177 Only use the brake paste listed in the linked description, and apply it solely at the specified positions, otherwise there may be problems with noise or damage to the brake system!	AR42.10-P-0161-01B
15	Apply brake paste	MB Plastilube brake paste (brownish)	*BR00.45-Z-1084-06A
16	Install in the reverse order
17	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
17	Operate the brake pedal several times until the brake pads (3) contact the brake disks	Firm resistance should be noticeable at the brake pedal.	AS42.50-Z-0002-01A
18	Check brake fluid level, correct if necessary
	Brake system - inspect fluid level		AP42.10-P-4210RT