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WS 930 1B660
| CONTROL UNIT | WS |
| MODEL SERIES /MODEL DESIGNATION | ACTROS 930.0 – 934.3 |
| CODE | DIAGNOSIS |
| 1B660 | CAN messages ‘Brake wear at 2nd front axle left’ and ‘Brake wear at 2nd front axle right’ from control unit FM front module are missing. |