My 1987 300SL tends to wander over the road requiring constant correction and hence a fair degree of concentration. This is especially noticeable in cross winds or where the road camber changes.
Lots of rubber bushes/mounts, tie rods, dampers etc. replaced at the front end. Wheels (all four) recently aligned including camber/castor adjustment by Mercedes. New Bilstein HD dampers all round. Tyres in good condition.
Could any part of the suspension at the rear cause this kind of problem? How about the differential (I think?) rubber mounts?

Thanks in advance.