I'd think it's the support-bearing (nr. 14). This is the part what fits in the bodywork (the 2 or 3 screws in the rumble seat, above the 'wheelnotch' (is this the right word????)) I had the same problem........ One of that support-bearing costs about 60 euro ($75,-)....
BMW '96 M3 (SOLD) June 2005 Car Of The Month!
Originally Posted by Torque
I was just dropped off here by aliens one day. They got bored with me.