There are two u shaped undercarriage protectors welded to the bottom of the car. Most likely they hit. -----Original Message----- From: Mark Pollan [mailto:mark.pollan at mci.com] Sent: Fri 29/04/2005 1:34 PM To: s-car-list at audifans.com Cc: Subject: [s-cars] Scraping when hitting a "depression" in the Road