Check Thickness And Condition Of Brake Disks - AR42.10-P-0120A

MODEL 292 

	Remove
	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
1	Remove wheel-and-tire assembly		AR40.10-P-1100GQC
	Check
2	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. For cracks and scores which have split open and are deeper than 0.5 mm: ↓ Replace brake disks (1) subject to separate repair order.
	Measure
3	Measure thickness of brake disks on front and rear axles using caliper gauge (010)	Front axle Brake disk thickness	*BE42.10-P-1001-08N
		Rear axle Brake disk thickness	*BE42.10-P-1001-09L
		Caliper gauge Observe recommended limit dimensions. If the wear limit has been exceeded or will be exceeded before the next brake pad change: ↓ Replace brake disks (1) on front axle subject to separate repair order.	Fig 1
	Install
4	Mount wheel and tire assembly		AR40.10-P-1100GQC

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 292.323/324 Model 292.356/362 except code P31 (AMG Line exterior) Model 292.356/362 with code 830 (Vehicles for China, additional parts) with code P31 (AMG Line exterior) Model 292.362 with code 494 (US version) with code P31 (AMG Line exterior)	Model 292.356/362 with code P31 (AMG Line exterior) except code 494 (US version) except code 830 (Vehicles for China, additional parts) Model 292.364/371 Model 292.373 except code U29 (AMG high-performance braking system)
BE42.10-P-1001-08N	Brake disk thickness	New	mm	32	36
		Wear limit	mm	29, 4	33, 4

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 292.373 with code U29 (AMG high-performance braking system) Model 292.374/375
BE42.10-P-1001-08N	Brake disk thickness	New	mm	36
		Wear limit	mm	34

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			Model 292.323/324 except code P31 (AMG Line exterior) Model 292.362 with code 494 (US version) except code P31 (AMG Line exterior)	Model 292.323/324 with code P31 (AMG Line exterior) Model 292.356/364/371 Model 292.362 except code 494 (US version) Model 292.362 with code 494 (US version) with code P31 (AMG Line exterior) Model 292.373 except code U29 (AMG high-performance braking system)
BE42.10-P-1001-09L	Brake disk thickness	New	mm	14	22
		Wear limit	mm	11, 4	19, 4

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			Model 292.373 with code U29 (AMG high-performance braking system) Model 292.374/375
BE42.10-P-1001-09L	Brake disk thickness	New	mm	26
		Wear limit	mm	24

Fig 1: Identifying Caliper Gauge (140 589 00 19 00)

Courtesy of MERCEDES-BENZ USA