Check Thickness And Condition Of Brake Discs - AR42.10-P-0120ME

Model 167 

except code B07 (AMG - ceramic brake system) 

MODIFICATION NOTES

15.02.2021

Brake disk thickness

Model 167.119/121/123 with code P31/U28

BE42.10-P-1001-08HA

Courtesy of MERCEDES-BENZ USA

	Risk of injury.  Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	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
	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 ceramic brake disks		AH42.10-P-9406-13A
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-1102ME
	Measure
2	Measure thickness of brake disks (1) on front and rear axles with vernier caliper.	Model 167.117/123/159/186/923/959/986 except code B07 (AMG - ceramic brake system) Model 167.119/121/148/149/921 with code P31 (AMG Line exterior) with code U28 (Larger brake system) with code U29 (AMG high-performance braking system) except code B07 (AMG - ceramic brake system) Model 167.119/121/921 except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.148/149 except code 847 (3rd seat row) except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.148/149 with code 494 (US version) with code 847 (3rd seat row) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code 847 (3rd seat row) except code 494 (US version) except code B07 (AMG - ceramic brake system) Model 167.161 except code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) Model 167.161 with code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) Brake disk thickness	*BE42.10-P-1001-09FA
		Model 167.117/119/121/123/148/149/159/186/921/93/959/986 with code U29 (AMG high-performance braking system) except code B07 (AMG - ceramic brake system) Model 167.117/159/921/923/959/986 except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.117 with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.117 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.119/121/123 except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.119/121/123 with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.119/121/123 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code 494 (US version) except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.148/149 with code 494 (US version) with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code P31 (AMG Line exterior) except code 494 (US version) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.159/921/923/959/986 with code 494 (US version) with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.159/921/923/959/986 with code P31 (AMG Line exterior) except code 494 (US version) except code B07 (AMG - ceramic brake system) Model 167.159 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.161 except code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) except code U29 (AMG high-performance braking system) Model 167.161 with code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) Model 167.161 with code U29 (AMG high-performance braking system)	*BE42.10-P-1001-08HA
		Caliper gauge	Fig 1
		If the wear limit has been exceeded or will be exceeded before the next brake pad change, ↓ replace brake disks (1).
		Front axle	AR42.10-P-0230ME
		Model 167 except code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) except code U29 (AMG high-performance braking system) except code U70 (red-painted brake callipers)
		Rear axle	AR42.10-P-0240ME
	Check
3	Check brake disks (1) on front and rear axle for corrosion, score marks, cracks and chippings.	For perforated brake disks (1) or brake disks with counterbores, assess crack length "x" including the bore diameter.
		Model 167.117/123/159/186/923/959/986 except code B07 (AMG - ceramic brake system) Model 167.119/121/148/149/921 with code P31 (AMG Line exterior) with code U28 (Larger brake system) with code U29 (AMG high-performance braking system) except code B07 (AMG - ceramic brake system) Model 167.119/121/921 except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.148/149 except code 847 (3rd seat row) except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.148/149 with code 494 (US version) with code 847 (3rd seat row) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code 847 (3rd seat row) except code 494 (US version) except code B07 (AMG - ceramic brake system) Model 167.161 except code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) Model 167.161 with code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) Check brake disks	*BE42.10-P-1002-09FA
		Model 167.117/119/121/123/148/149/159/186/921/923/959/986 with code U29 (AMG high-performance braking system) except code B07 (AMG - ceramic brake system) Model 167.117/159/921/923/959/986 except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.117 with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.117 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.119/121/123 except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.119/121/123 with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.119/121/123 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code 494 (US version) except code B07 (AMG - ceramic brake system) except code P31 (AMG Line exterior) except code U28 (Larger brake system) except code U29 (AMG high-performance braking system) Model 167.148/149 with code 494 (US version) with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code P31 (AMG Line exterior) except code 494 (US version) except code B07 (AMG - ceramic brake system) Model 167.148/149 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.159/921/923/959/986 with code 494 (US version) with code P31 (AMG Line exterior) except code B07 (AMG - ceramic brake system) Model 167.159/921/923/959/986 with code P31 (AMG Line exterior) except code 494 (US version) except code B07 (AMG - ceramic brake system) Model 167.159 with code U28 (Larger brake system) except code B07 (AMG - ceramic brake system) Model 167.161 except code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) except code U29 (AMG high-performance braking system) Model 167.161 with code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) Model 167.161 with code U29 (AMG high-performance braking system)	*BE42.10-P-1002-08HA
		If problems exist, ↓ Replace brake disks (1).
		Rear axle	AR42.10-P-0240ME
		Front axle Model 167 except code B06 (Silver brake calipers) except code B07 (AMG - ceramic brake system) except code U29 (AMG high-performance braking system) except code U70 (red-painted brake callipers)	AR42.10-P-0230ME
	Install
4	Install wheel and tire assemblies.		AR40.10-P-1102ME

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 167.117/119/121/123/148/149/159/186/317/349/921/923/959/967/986 with code U29 Model 167.154/357/359/987 with code U29 except code 494/P31/U28 Model 167.161 with code B06/U29 model 167.188/189/388/389 Model 167.321/323 with code U29 except code P31 model 167.361 with code U29/U70 model 167.989 except code 494/P31	Model 167.119/121/123 with code P31/U28
BE42.10-P-1001-08HA	Brake disk thickness	New	mm	38	36
		Wear limit	mm	36	34

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 167.159 with code U28 Model 167.117 with code P31/U28 Model 167.154/357/359 with code P31/U28 except code 494/U29 Model 167.159/921/923/959/986/989 with code P31 except code 494 Model 167.161 except code B06/U29 Model 167.186/967 except code U29 Model 167.321/323 with code P31 except code U29 model 167.361 except code U29/U70 Model 167.987 except code 494/U28/U29	Model 167.117/154/159/357/359/921/923/959/986 except code P31U28//U29 model 167.317 except code U29 167.321/323 except code P31/U29 model 167.987 with code 494 except code P31/U28
BE42.10-P-1001-08HA	Brake disk thickness	New	mm	36	36
		Wear limit	mm	34	33, 4

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 167.109/148/149/987 with code U28 model 167.148/149 with code P31 except code 494 model 167.154/359 with code 494+P31 except code U28/U29 Model 167.159/921/923/959/986/987 with code 494+P31 model 167.989 with code 494	Model 167.109/119/121/123 except code P31/U28//U29 Model 167.148/149 with code 494 except code P31/U28/U29 model 167.349 except code U29
BE42.10-P-1001-08HA	Brake disk thickness	New	mm	36	32
		Wear limit	mm	35	29, 4

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation			Model 167.148/149 with code 494+P31
BE42.10-P-1001-08HA	Brake disk thickness	New	mm	32
		Wear limit	mm	30

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			Model 167.109/117/123/154/159/186/317/321/323/349/357/359/923/959/967/986/987 Model 167.119/121/148/149/189/388/389/921/989 with code P31/U28/U29 Model 167.148/149 with code 847 except code 494 Model 167.161 except code B06 Model 167.361 except code U29/U70	Model 167.119/121/921 except code P31/U28/U29 Model 167.148/149 except code 847/P31/U28/U29 Model 167.148/149 with code 494+847
BE42.10-P-1001-09FA	Brake disk thickness	New	mm	22	14
		Wear limit	mm	20	12

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation			Model 167.161 with code B06 Model 167.361 with code U29/U70 Model 167.189/388/389/989 except code P31/U28/U29
BE42.10-P-1001-09FA	Brake disk thickness	New	mm	32
		Wear limit	mm	30

CHECK VALUES FOR FRONT AXLE BRAKE DISKS

Number	Designation				Model 167.117/119/121/123/148/149/159/186/317/349/921/923/959/967/986 with code U29 Model 167.154/357/359/987 with code U29 except code 494/P31/U28 Model 167.161 with code B06/U29 model 167.188/189/388/389 Model 167.321/323 with code U29 except code P31 Model 167.361 with code U29/U70 Model 167.989 except code 494/P31	Model 167.119/121/123with code P31/U28
BE42.10-P-1002-08HA	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 167.159 with code U28 model 167.117 with code P31/U28 model 167.154/357/359 with code P31/U28 except code 494/U29 Model 167.159/921/923/959/986/989 with code P31 except code 494 Model 167.161 except code B06/U29 Model 167.186/967 except code U29 Model 167.321/323 with code P31 except code U29 Model 167.361 except code U29/U70 Model 167.987 except code 494/U28/U29	Model 167.117/154/159/35 7/359/921/923/959/9 86 except code P31U28//U29 Model 167.317 except code U29 167.321/323 except code P31/U29 model 167.987 with code 494 except code P31/U28
BE42.10-P-1002-08HA	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 167.109/148/149/987with code U28 model 167.148/149with code P31 except code 494 model 167.154/359 with code 494+P31 except code U28/U29 Model 167.159/921/923/959/986/987 with code 494+P31model 167.989 with code 494	Model 167.109/119/121/123 except code P31/U28//U29 Model 167.148/149 with code 494 except code P31/U28/U29 model 167.349 except code U29
BE42.10-P-1002-08HA	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 167.148/149 with code 494+P31
BE42.10-P-1002-08HA	Check brake disks	Crack length	Dimension "x"	mm	< 25
		Crack depth		mm	< 0, 5

CHECK VALUES FOR REAR AXLE BRAKE DISKS

Number	Designation				Model 167.109/117/123/154/159/186/317/321/323/349/357/359/923/959/967/986/987 Model 167.119/121/148/149/189/388/389/921/989 with code P31/U28/U29 Model 167.148/149 with code 847 except code 494 Model 167.161 except code B06 Model 167.361 except code U29/U70	Model 167.119/121/921 except code P31/U28/U29 Model 167.148/149 except code 847/P31/U28/U29 Model 167.148/149 with code 494+847
BE42.10-P-1002-09FA	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 167.161 with code B06 Model 167.361 with code U29/U70 Model 167.189/388/389/989 except code P31/U28/U29
BE42.10-P-1002-09FA	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