Inspect condition of brake disks - AP42.10-P-4258R

WARNING: This page is about a different car, the 2009 Mercedes-Benz E550 and 2008 Mercedes-Benz E550. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 211.004/006/007/008/016/020/022/023/024/026/028/029/041/042/052/054/056/057/061/065/070/072

/076/077/080/082/083/084/087/089/090/092/206/207/208/216/220/222/223/226/241/242/252/254/256

/257/261/265/270/272/276/277/280/282/283/284/287/289/290/292/606/608/616/620

MODEL 230.454/456/458/467/470/471/472/474/475/476/477/479

Fig 1: Inspecting Brake Discs

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Hairline Crack Length

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	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
1	Detach complete wheels		AP40.10-P-4050Z
2	Remove brake pads on rear axle
	Remove/check/install rear axle brake pads.	Model 230.470/472/474/476/477/479	AR42.10-P-1700RA
	Checking
3	Check brake disks (61) for score marks and hairline cracks	Hairline cracks can occur due to high stress. Ventilated, brake disks (61) with perforations and without perforations do not have to be replaced if the hairline crack length (1) is a maximum of 25 mm. On perforated brake disks (61), the hairline crack length (1) including the hole diameter must be measured. With gaping hairline cracks and scores deeper than 0.5 mm: ↓
	Check brake disks (61) for score marks and hairline cracks	Replace brake disks.	AR42.10-P-0220R
	Clean
4	If necessary, clean the perforation in the brake disks (61)	Vehicles with perforated brake disks (61)
	Cleaning perforations in brake discs	Vehicles with perforated brake disks (61)	AR42.10-P-2260-01I
	Measure
5	Measure thickness of brake disks on front and rear axles using caliper gauge (035)	Observe wear limits of brake disks (61) so that these are not dropped below up to the next maintenance service, if necessary: ↓
		Replace brake disks. Test values for brake disks:	AR42.10-P-0220R
		Model 211	AP42.10-P-4251-01T
		Model 230	AP42.10-P-4251-01R
		Measuring caliper	*140589001900
6	Install in the reverse order

Fig 3: Identifying Vernier Caliper (140 589 00 19 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.