I have just recently purchased a used 05 s60 2.5t and today while driving home from getting gas I notice there is a rattling sound coming from my front driver side tire perhaps, somewhere in that area. It happens often when i hit dips or bumps in the road and occasionally when just driving on level ground. It sounds as if something is rattling under my car or clicking. I looked to see if anything noticeable was hanging or loose, but i did not see anything. the problem does not sound major but I am going to give my mechanic a call tomorrow to see whats up. Anyone else possibly know what it could be or have this happen to them before? Any help is appreciated from you guys, thanks.