My only gripe with my m5 since ive owned it is you really have to slam the bootlid down in order to make it shut... i know it shouldnt be like this as my mate has one and its nice and gentle.. what do i need to adjust???
Probably the catch on the body. There are two covers on the rear plastic piece in the boot that give access to the adjustment screws. They will probably be Torx head, but not all are, T27 or T30 I think.