so i just got my 04 S60 a week ago and i decided to check out the undercoating before winter. As i suspected, there is NO undercoating behind the inner fender liners....doesn't seem like a big deal except when the cars get a little older and you find that they've rusted BEHIND the plastic....had this happen on my lincoln....so i pulled the fender liners out from all four corners and sprayed them with paintable undercoating....then put the liners back in.....you have to drill out the rivits but it's quicker than turning old screws....


http://i684.photobucket.com/albums/v...ndercoated.jpg