Similar issues on my E36, control arms, bushes etc known week spot on E36 prob the same on E46, after quite a bit of research decided to replace complete arms inc bushes, ball joints and drop links with Meyle heavy duty setup, was due to be done yesterday but one rubber boot was slightly damaged so had to wait for replacement, so not being fitted until next week. Decided against poly as some reviews stated that the ride was too stiff and as mine is a vert did not want to risk making the scuttle shake any worst