Body problems of the 2008 Audi TT

Possible design defect in the 2008 Audi Tt roadster.   on October 18, 2008 I was on a suburban street and unwittingly drove over what I believe was a small rock.   the latter unalarmingly banged into the bottom of the car.   a few blocks later I pulled into my friend?s driveway, parked, and went inside.   five minutes later I came out and found that the car?s entire oil reservoir had spilled out onto the driveway. I phoned fred baker Audi service, and within an hour the car was being inspected by the mechanic team.   I want to make it clear that I have no problem with the excellent customer service provided by fred baker Porsche Audi.   here is what concerns me:â  Audi mechanics explained to me that the screw that secures the pan had punctured the oil pan because it is too long and not protected.   however unusual this occurrence was, I believe that Audi should have protectors over the screws so that they are not driven into the oil pan if a rock hits the undercarriage of the car.