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

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MODEL 463.202/236/237/346 as of model year 2012

MODEL 463.272/273/274

Shown on model 212

Fig 1: Inspecting Brake Disks Condition

Courtesy of MERCEDES-BENZ USA

	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Remove/install
1	Raise vehicle with vehicle lift
2	Detach complete wheel	Remove/install wheels, rotate if necessary	AP40.10-P-4050G
	Check
3	Check brake disks (1) at front and rear axle	Inspect for scores and cracks. Hairline cracks can occur due to high stress. Brake disks (1) do not have to be replaced when the crack length (2) is a maximum of 25 mm. With perforated brake disks or those provided with sunk holes (1) measure the crack length (2) including the bore diameter. With gaping cracks and score marks deeper than 0.5 mm replace brake disks (1).
	Measure
4	Measure thickness of brake disks on front and rear axles using caliper gauge (010)	Observe recommended limit dimensions so that the wear limit is not dropped below before the next brake pad change, if necessary replace brake disks (1): ↓
		Check values for front axle brake disks	*BE42.10-P-1001-08C
		Check values for rear axle brake disks	*BE42.10-P-1001-09C
		Caliper gauge	Figure

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			MODEL 460, 461, 463 (except 463.270/271/272/273/274) without internally vented brake disks	MODEL 463 (except 463.270/271/272/273/274) with internally vented brake disks
BE42.10-P-1001-08C	Brake disk thickness	New	mm	16	30
BE42.10-P-1001-08C	Brake disk thickness	Wear limit	mm	13	27

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			MODEL 463.272/273/274
BE42.10-P-1001-08C	Brake disk thickness	New	mm	36
BE42.10-P-1001-08C	Brake disk thickness	Wear limit	mm	34

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			MODEL 461, 463 (except 463.270/271/272/273/274)	MODEL 463.272/273/274
BE42.10-P-1001-09C	Brake disk thickness	New	mm	16	22
BE42.10-P-1001-09C	Brake disk thickness	Wear limit	mm	14	20

Fig 2: Identifying Caliper Gauge (140 589 00 19 00)

Courtesy of MERCEDES-BENZ USA