Check Thickness And Condition Of Brake Disks - AR42.10-P-0120S
Model 223
except code B07 (AMG - ceramic brake system)
Shown on left side of vehicle
| 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 | |
| Topical note | 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-1102A | |
| Measure | |||
| 2 | Measure thickness of brake disks (1) on front and rear axles using vernier caliper. | Brake disk thickness | *BE42.10-P-1001-08KA |
| Model 223 with engine 176, 256, 656 with code U29 (Sports braking system) except code B07 (AMG - ceramic brake system) Model 223 with engine 176 except code B07 (AMG - ceramic brake system) except code U29 (Sports braking system) Model 223 with engine 256 except code B07 (AMG - ceramic brake system) except code ME10 (Hybrid vehicle) except code U29 (Sports braking system) Model 223 with engine 256 with code ME10 (Hybrid vehicle) except code B07 (AMG - ceramic brake system) except code U29 (Sports braking system) Model 223 with engine 656 except code B07 (AMG - ceramic brake system) except code U29 (Sports braking system) Brake disk thickness |
*BE42.10-P-1001-09IA | ||
If the wear limit has been exceeded or will be exceeded before the next brakepad change. ↓ replace brake disk (1) in pairs. |
Fig 1 | ||
| Remove/install brake disk (1) on front axle | AR42.10-P-0230S | ||
| Remove/install brake disk (1) on rear axle | AR42.10-P-0240S | ||
| Check | |||
| 3 | Check brake disk (1) on front and rear axle for corrosion, score marks, cracks and chippings. | ||
| Check brake disks | *BE42.10-P-1002-08KA | ||
| Model 223 with engine 176, 256, 656 with code U29 (Sports braking system) except code B07 (AMG - ceramic brake system) Model 223 with engine 176 except code B07 (AMG - ceramic brake system) except code U29 (Sports braking system) Model 223 with engine 256 except code B07 (AMG - ceramic brake system) except code ME10 (Hybrid vehicle) except code U29 (Sports braking system) Model 223 with engine 256 with code ME10 (Hybrid vehicle) except code B07 (AMG - ceramic brake system) except code U29 (Sports braking system) Model 223 with engine 656 except code B07 (AMG - ceramic brake system) except code U29 (Sports braking system) Check brake disks If there is a problem, ↓ replace brake disk (1) in pairs. |
*BE42.10-P-1002-09IA | ||
| Remove/install brake disk (1) on front axle | AR42.10-P-0230S | ||
| Remove/install brake disk (1) on rear axle | AR42.10-P-0240S | ||
| Install | |||
| 4 | Attach wheel and tire assemblies. | AR40.10-P-1102A |
TEST VALUES FOR FRONT BRAKE DISKS
| Number | Designation | Model 223 | ||
|---|---|---|---|---|
| BE42.10-P-1001-08KA | Brake disk thickness | New | mm | 36 |
| Wear limit | mm | 34 | ||
CHECK VALUES FOR REAR AXLE BRAKE DISKS
| Number | Designation | Model 223 with engine 176, 256, 656 with code U29 (Sports braking system) | Model 223 with engine 176 except code U29 (Sports braking system) Model 223 with engine 256 with code ME10 (Hybrid vehicle) except code U29 (Sports braking system) |
||
|---|---|---|---|---|---|
| BE42.10-P-1001-09IA | Brake disk thickness | New | mm | 26 | 26 |
| Wear limit | mm | 24 | 23, 4 | ||
CHECK VALUES FOR REAR AXLE BRAKE DISKS
| Number | Designation | Model 223 with engine 256 except code ME10 (Hybrid vehicle) except code U29 (Sports braking system) Model 223 with engine 656 except code U29 (Sports braking system) | ||
|---|---|---|---|---|
| BE42.10-P-1001-09IA | Brake disk thickness | New | mm | 24 |
| Wear limit | mm | 21, 4 | ||
TEST VALUES FOR FRONT BRAKE DISKS
| Number | Designation | Model 223 | |||
|---|---|---|---|---|---|
| BE42.10-P-1002-08KA | Check brake disks | Crack length | Dimension "x" | mm | < 25 |
| Crack depth | mm | < 0.5 | |||
CHECK VALUES FOR REAR AXLE BRAKE DISKS
| Number | Designation | Model 223 with engine 176, 256, 656 with code U29 (Sports braking system) | Model 223 with engine 176 except code U29 (Sports braking system) Model 223 with engine 256 with code ME10 (Hybrid vehicle) except code U29 (Sports braking system) |
|||
|---|---|---|---|---|---|---|
| BE42.10-P-1002-09IA | 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 223 with engine 256 except code ME10 (Hybrid vehicle) except code U29 (Sports braking system) Model 223 with engine 656 except code U29 (Sports braking system) |
|||
|---|---|---|---|---|---|
| BE42.10-P-1002-09IA | Check brake disks | Crack length | Dimension "x" | mm | < 25 |
| Crack depth | mm | < 0, 5 | |||