Thank you for your responses. I've been using the online EPC at RealOEM.com and I believe it is the same as the dealer. Unfortunately, not knowing what to look up hinders your ability to look up the part. I've even had the parts guys at Tischer try and help.
I've gone through every diagram of every subsystem in that area and still can't find it. However, Kev's hint that there is a sensor on the fender liner might help. Unfortunately, both fender liners had been scrapped before I purchased the car but at least I have a new starting place to look.
I've tried on online TIS/elecvtrical diagram but was unable to view the data as it only works with IE and there is no IE on this computer.
Thanks again for the help. If anyone else can provide additional hints I'd be greatfull.