my 7 also knocks over small bumps and speed humps if you go too fast,, just had 18k service so i asked them to look and reported it all fine,,, what else could it be??? also i have play in front wheels from top to bottom, i suspcted wheel bearings but they're also apparently fine,, can anyone help,, i havent even taken a wheel off to have a look yet, so point me in the right direction,, cheers