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

Model 118 

Courtesy of MERCEDES-BENZ USA

	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
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Notice	Notes on handling, transport and storage of composite brake disks		AH42.10-P-9406-12LF
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove
1	Remove wheel and tire assemblies.		AR40.10-P-1102MFA
	Measure
2	Measure thickness of brake disks (1) on front and rear axles with vernier caliper.	Model 118.303/351/353/354/384/651/653/654 with code U29 (Sports braking system) Model 118.303/384 except code U29 (Sports braking system) Model 118.351/353/354/651/653/654 except code U29 (Sports braking system) Brake disk thickness	*BE42.10-P-1001-09DA
		Model 118.303/384/684 with code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.303/384 except code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.303/384 with code U29 (Sports braking system) except code 950 (AMG sport package) Model 118.312/314/344/345/346/347/387/614/646/647/687 with code 950 (AMG sport package) Model 118.312/314/344/345/346/347/387/614/646/647/687 with code U29 (Sports braking system) Model 118.312/387/687 except code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.314/344/345/346/347/614/646/647 except code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.351/603/612/613/644/651 with code U29 (Sports braking system) Model 118.351/651 except code U29 (Sports braking system) Model 118.353/354/653/654 except code U29 (Sports braking system) except code U70 (red-painted brake callipers) Model 118.353/354/653/654 with code U29 (Sports braking system) except code U70 (red-painted brake callipers) Model 118.353/354/653/654 with code U70 (red-painted brake callipers) except code U29 (Sports braking system) Model 118.603 except code U29 (Sports braking system) Model 118.612/613 except code U28 (Higher-power braking system) except code U29 (Sports braking system) Model 118.612/613 with code U28 (Higher-power braking system) Model 118.644 except code U29 (Sports braking system) Brake disk thickness	*BE42.10-P-1001-08FA
		Caliper gauge If the wear limit has been exceeded or will be exceeded before the next brakepad change. ↓ Replace brake disks (1).	Fig 1
			AR42.10-P-0220MFA
	Check
3	Check brake disks (1) on front and rear axle for corrosion, score marks, cracks and chippings.	For perforated brake disks or those provided with sunk holes (1) assess the crack length (x) including the bore diameter. Model 118.303/351/353/354/384/651/653/654 with code U29 (Sports braking system) Model 118.303/384 except code U29 (Sports braking system) Model 118.312/314/344/345/346/347/387/603/612/613/614/644/646/647/684/687 Model 118.351/353/354/651/653/654 except code U29 (Sports braking system) Check brake disks	*BE42.10-P-1002-09DA
		Model 118.303/384/684 with code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.303/384 except code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.303/384 with code U29 (Sports braking system) except code 950 (AMG sport package) Model 118.312/314/344/345/346/347/387/614/646/647/687 with code 950 (AMG sport package) Model 118.312/314/344/345/346/347/387/614/646/647/687 with code U29 (Sports braking system) Model 118.312/387/687 except code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.314/344/345/346/347/614/646/647 except code 950 (AMG sport package) except code U29 (Sports braking system) Model 118.351/603/612/613/644/651 with code U29 (Sports braking system) Model 118.351/651 except code U29 (Sports braking system) Model 118.353/354/653/654 except code U29 (Sports braking system) except code U70 (red-painted brake callipers) Model 118.353/354/653/654 with code U29 (Sports braking system) except code U70 (red-painted brake callipers) Model 118.353/354/653/654 with code U70 (red-painted brake callipers) except code U29 (Sports braking system) Model 118.603 except code U29 (Sports braking system) Model 118.612/613 except code U28 (Higher-power braking system) except code U29 (Sports braking system) Model 118.612/613 with code U28 (Higher-power braking system) Model 118.644 except code U29 (Sports braking system) Check brake disks If problems exist, ↓ Replace brake disks (1).	*BE42.10-P-1002-08FA
			AR42.10-P-0220MFA
	Install
4	Install wheel and tire assemblies.		AR40.10-P-1102MFA

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 118.303/384 except code 950/U29	Model 118.303/384/684 with code 950 except code U29, model 118.312/387/687 except code 950/U29, model 118.603 except code U29 model 118.612/613 except code U28/U29
BE42.10-P-1001-08FA	Brake disk thickness	New	mm	24	28
		Wear limit	mm	21, 4	25, 4

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 118.303/384 with code U29 except code 950, model 118.312/314/344/345/346/347/387/614/646/647/687 with code 950/U29 model 118.351/603/644/651 with code U29, model 118.353/354/653/654 with code U29 except code U70 model 118.612/613 with code U28/U29	Model 118.314/344/345/346/347/614/646/647 except code 950/U29, model 118.644 except code U29
BE42.10-P-1001-08FA	Brake disk thickness	New	mm	30	30
		Wear limit	mm	28	27, 4

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 118.351/651 except code U29, model 118.353/354/653/654 except code U29/U70	Model 118.353/354/653/654 with code U70 except code U29
BE42.10-P-1001-08FA	Brake disk thickness	New	mm	32	36
		Wear limit	mm	30	34

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			Model 118.303/384 except code U29	Model 118.303/351/353/354/384/651/653/654 with code U29, model 118.312/314/344/345/346/347/387/603/612/613/614/644/646/647/684/687
BE42.10-P-1001-09DA	Brake disk thickness	New	mm	11	12
		Wear limit	mm	9, 3	10, 3

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			Model 118.351/353/354/651/653/654 except code U29
BE42.10-P-1001-09DA	Brake disk thickness	New	mm	22
		Wear limit	mm	20

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation				Model 118.303/384 except code 950/U29	Model 118.303/384/684 with code 950 except code U29, model 118.312/387/687 except code 950/U29, model 118.603 except code U29 model 118.612/613 except code U28/U29
BE42.10-P-1002-08FA	Check brake disks	Crack length	Dimension "x"	mm	< 25	< 25
		Crack depth		mm	< 0, 5	< 0, 5

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation				Model 118.303/384 with code U29 except code 950, model 118.312/314/344/345/346/347/387/614/646/647/687 with code 950/U29 model 118.351/603/644/651 with code U29, model 118.353/354/653/654 with code U29 except code U70 model 118.612/613 with code U28/U29	Model 118.314/344/345/346/347/614/646/647 except code 950/U29, model 118.644 except code U29
BE42.10-P-1002-08FA	Check brake disks	Crack length	Dimension "x"	mm	< 25	< 25
		Crack depth		mm	< 0, 5	< 0, 5

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation				Model 118.351/651 except code U29, model 118.353/354/653/654 except code U29/U70	Model 118.353/354/653/654 with code U70 except code U29
BE42.10-P-1002-08FA	Check brake disks	Crack length	Dimension "x"	mm	< 25	< 25
		Crack depth		mm	< 0, 5	< 0, 5

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation				Model 118.303/384 except code U29	Model 118.303/351/353/354/384/651/653/654 with code U29, model 118.312/314/344/345/346/347/387/603/612/613/614/644/646/647/684/687
BE42.10-P-1002-09DA	Check brake disks	Crack length	Dimension "x"	mm	< 25	< 25
		Crack depth		mm	< 0, 5	< 0, 5

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation				Model 118.351/353/354/651/653/654 except code U29
BE42.10-P-1002-09DA	Check brake disks	Crack length	Dimension "x"	mm	< 25
		Crack depth		mm	< 0, 5

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

Courtesy of MERCEDES-BENZ USA