Repair Brake Caliper Guide - AR42.10-S-0400S

Model 447, 448 

Model 636, 639 

Vehicles with Brembo brake system 

Courtesy of MERCEDES-BENZ USA

	Remove
1	Remove brake linings	Model 636, 639	AR42.10-S-1600S
		Model 447, 448	AR42.10-S-1610E
2	Remove anti-rattle springs (1) from brake caliper support (2)
	Clean
3	Clean brake parts and contact surfaces on brake caliper support (2)	Brake caliper brush	Fig 1
	Check
4	Check brake parts for wear and damage, and replace as per findings
	Check lining thickness of brake pads and condition of brake disks	Model 447, 448	AP42.10-S-4251E
	Check lining thickness of brake pads and condition of brake disks	Model 636, 639 If wear or damage present ↓ Replace front axle brake disks	AP42.10-S-4251A
		Remove/install front axle brake disk MODEL 636, 639	AR42.10-S-0230S
		Remove/install front axle brake disk Model 447, 448	AR42.10-S-0230E
	Remove
5	Remove guide pins (3, 4) and remove bellows (5)	To do so, push guide pins (3, 4) in direction of arrow out of guide holes and then remove the bellows (5).
	Clean
6	Clean seat of guide pins (3, 4) in guide holes
	Install
7	Install new boots (5) in the corresponding brake caliper grooves	Make sure that the boots (5) are seated correctly. This prevents malfunctions in the brake system.
8	Coat new guide pins (3, 4), guide holes and insides of boots (5) with the assembly grease included in the repair kit
9	Install new guide pins (3, 4)	Make sure that the boots (5) are correctly seated in the grooves in the guide pins (3, 4). This prevents malfunctions in the brake system. Install new guide pin (3) with guide ring in direction of arrow into upper guide hole and new guide pin (4) without guide ring in direction of arrow into lower guide bore.
10	Allow existing air to escape from the boots (5)	To do this, lift boots (5) slightly out of brake caliper groove at one point and press out air.
11	Install anti-rattle springs (1) into brake caliper support (2)	Replace anti-rattle springs (1).
12	Install brake lining	Model 636, 639	AR42.10-S-1600S
		Model 447, 448	AR42.10-S-1610E
	Check
13	Check fluid level in brake fluid reservoir and correct according to findings
	Brake fluid notes		AH42.50-P-0001-01A
	Brake fluids (DOT 4 plus)		BB00.40-P-0331-00A
14	Build up brake pressure	To do this, operate brake pedal several times.
15	Check brake system for leaks	Visual inspection only.

Fig 1: Identifying Brake Caliper Brush (000 589 26 68 00)

Courtesy of MERCEDES-BENZ USA