I just found that my right rear ride height is slightly lower than the rear left (by a finger at least). Upon checking further, saw that the dust cover on the original M-sport absorber (sachs) is missing on the strut, although i don't think this is the culprit. Front left and right ride heights are balanced. On top of that, found all the suspension bushings may need to be need replacement due to cracks from wear and tear. Mind you, these suspension system have not been changed since the beginning (2004). I have not yet hear any noise to indicate any malfunction, nor felt any funny experience during cornering and/or wavy road driving conditions.Looking for advice on how to proceed. Few paths that seems plausible now:1. Do nothing. Only change all absorbers and springs (if needed) when one fails.2. Change only rear absorbers. Maintain M-sport springs.3. Change all 4 absorbers. Maintain M-sport springs.4. Change all 4 absorbers and springs.I have driven my UDM for almost 3 weeks now, and clocked in about 1000km only. For now, i'm comfortable with the M-sport setup. Even i have to change, i might try to find something close enough to what is on the car already. Then again, i haven't been in another e46 with a customized setup to tell the difference.Will try to post some pictures soon. In the meantime, feedbacks appreciated.