Digging up an old thread
My 400e is almost harder to start at 10* than any of my diesels. Once it starts it has a noticeable miss at idle till it's good and warmed up. I even have to shift to neutral at stop lights.
Add to that a weird 'rattle/knock from around the trunk area till its warm(exhaust?). THEN "clicks" from perhaps the rear headrests till warm.
Once it's warm, like 80C, all these problems go away.
Coils?
Keep in mind I know next to nothing about gas MB's
