The guy who sold me my car installed one of these (they all seem to be the same)
on the front driver's side door panel. The upside is that is was a real good match to the existing interior. The downside is that I hate it, and wish that he hadn't put it in. To me, it's just in the way, and if I do remove it, there are the three screw holes left in my door panel...(yes, I know there are four holes, but following the directions, he only used three screws.)
BTW, he told me he bought it from the local MB dealer, and paid about $40 for it.
Remember kids, don't drink and drive. But, if you must drive, do so responsibly