Considering that your 4.8iS has fender flares...I advise that you go with the touchless car was or just wash yourself if you have the time.

Was in a rush to an out of state gig and made the mistake of going through one of those brush car washes...
http://www.x5world.com/x5-e53-forum/...el-arches.html

__________________
"Truth is treason in the empire of lies" Dr. Ron Paul

"When the power of love overcomes the love of power the world will know peace" Jimmy Hendrix