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

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08 R320 CDI current

Past
95 E420
87 300D Turbo 5spd
90 300TE
83 300SD
85 300TD
92 400E
85 190D