PSA: I had some mysterious engine shutdowns during the startup process with my Mercedes-Benz C300 4MATIC (2013MY) over the past year. Symptoms were:
- Typically on a warm start (e.g. the car had been running just a short while before, engine oil temperatures had not yet fallen to ambient)
- On start, engine would cause severe enough vibrations to shake the car (feels unbalanced)
- Or shortly after start, engine would spontaneously shut down (while still in Park)
This, to me, was seriously troubling. When I sent my car in for servicing, I noted the issue to the technician. An ECU update was applied and, since then, I’ve not experienced either symptom (severe vibrations nor engine shut-down). If you’re seeing these issues, take it into the shop and have them check for updated ECU software.