From a dead stop, traffic light or whatever, not gunning it, when first gear engages there is a loud whack from the back and the car shudders. Doesn't happen all the time but often enough to bother me. First time it happened it scared the s***t out of me. I thought I got rear ended. I literally looked in my rear view expecting to see a Denali or something that size with steam coming out of it's smashed hood on my rear bumper. It's not always that severe. Most of the time it's much more mild but still unnerving. Complained to my dealer twice and twice they "reprogrammed" my SMG (whatever that means) and it got a little better but not gone. I was also told this is not an unusual condition for SMG M5's so I thought I'd check with the most reliable source, The Board.
Thanks.
Thanks.