Mercedes Benz S Class recall: Stop start engine may not restart
- What's wrong
- The excess length of the wiring harness to the engine control unit could result in a faulty camshaft signal. This faulty camshaft signal may lead to an unintentional cancellation of the automatic starting procedure after automatic engine stop of the automatic start/stop system. In the…
- What to do
- Contact a Mercedes Benz dealer to book the free repair. Recall the vehicles that are likely to be affected and rework the wiring harness to the engine control unit on the affected vehicles as a precautionary measure.
What’s wrong
The excess length of the wiring harness to the engine control unit could result in a faulty camshaft signal. This faulty camshaft signal may lead to an unintentional cancellation of the automatic starting procedure after automatic engine stop of the automatic start/stop system. In the event of a faulty camshaft signal the engine would not restart as expected following the stop procedure but can be manually restarted immediately by engaging the transmission selector lever position �N� or �D� and by operating the ignition key or the start button (with keyless go). Depending on the traffic situation however an increased accident hazard could result.
The fix
Recall the vehicles that are likely to be affected and rework the wiring harness to the engine control unit on the affected vehicles as a precautionary measure.
Vehicles affected
| Model | Built from | Built to | Vehicles |
|---|---|---|---|
| S Class | 1 Aug 2012 | 31 Aug 2015 | 1,126 |
How to check your vehicle
Use the official DVSA checker with your registration number to see if your exact vehicle is included. If it is, the manufacturer should have written to the registered keeper. The repair is free, even if you bought the vehicle second-hand.
Updated 8 January 2016. This page summarises an official notice. Details can change – always follow the official notice.