Service bulletin LI07.70-P-078547
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11026829 |
| Published by NHTSA | 2025-12-24 |
| Manufacturer's number | LI07.70-P-078547 |
| Manufacturer's date | 2025-12-18 |
| NHTSA component | ENGINE |
NHTSA's 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
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine
| MERCEDES-BENZ C 300 | 2022 to 2023 |
|---|---|
| MERCEDES-BENZ C 300 4MATIC | 2022 to 2023 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.