92 400E Transmission
 

When I first engage D in my car (particularly if it's cold) there's a loud thunk in the rear end right as I start to accelerate. Even if I'm quite gentle about it. It's been doing it for the 5 years I've owned it without getting any worse and the transmission operates normally otherwise so I'm not too worried about it. This is the only MB I've owned with ASR so I'm assuming it has something to do with that. But if anyone knows what's going on or has dealt with this before, I'd appreciate a light at the end of the tunnel.

Thanks

I have ASR also, but no pronounced thunk. (just slow engagement into reverse)

ATF level ok?

message me your vin and I can help you out :)

Have you checked the rear flex disc?

I too was going to suggest checking the flex disc. If it gives way at highway speed, your airbag may deploy suddenly, which would be a BAD thing.

check the differential mount bushings.one is worn prob on left.

If I could of have your vin please I will email some pdf documents to you :)