I suspect the springs - when I load stuff in the back it gets pretty low pretty quickly, and it's an estate/station wagon so the springs should be stiffer than the saloon/sedan version, shouldn't they?To change the springs, do you have to remove the shocks? My garage complained about how fiddly it was when I had the shocks done. I'd have thought he'd have said something about the springs though if they were as bad as they seem to be.