Hi I have a 2008 528i auto and I've been having issues recently. What happens is(and it only happens when it's cold out/before the cars warmed up) when I come to a stop and then start to go again it will often start to roll backwards for maybe half a wheel rotation and then it slams (feels like it comes from the back of the car) and then sets of normal. I'm taking it into the dealer this week probably, but would like to try and figure out beforehand. Thanks