Engine idle fluctuates or stumbles at approximately 7 second interval
Mercedes-Benz technical service bulletin LI07.70-P-078547 for 2022-2023 Mercedes-Benz C300 and 2022-2023 Mercedes-Benz C 300 4matic.
- Bulletin number
- LI07.70-P-078547
- Component
- Engine
- Summary
- Complaint Engine idle fluctuates or stumbles at approximately 7 second interval. No relevant fault codes are stored. If fault codes are stored or check engine light illuminated, this should be diagnosed separately. Cause Torque signal mismatch between MRG and PTCU control units. Only effects version 20B of PTCU. Remedy Update software of powertrain control unit N127. New software version: MY 2022- A2549021611 MY 2023- A2549023610
Owners of these vehicles have filed 4 complaints in the engine category.
Vehicles covered
- Mercedes-Benz C300 2022-2023 20222023
- Mercedes-Benz C 300 4matic 2022-2023 20222023
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