My s60 ( 20,000 miles) has a strange suspension noise. On rough roads it almost sounds like a loose shock. Smooth roads or gradual bumps no noise. Dealer has looked for noise with nothing found. I have been all under that thing and have not seen anything apparant or found anything loose. Bouncing the car up and down doeas not produce the noise. It must be caused by jolts which can be small (little potholes, bumps in road). It is really hard to discern where sound is coming from but I think it is front. HELP!!