I have a 1992 Mercedes 500E with a Valentine unit mounted with the display into the central dash wood. The sensing detector is mounted in the front license plate frame. It works great and has saved me many unpleasant outcomes. It is totally invisible to the untrained eye. I also have a 2003 Mercedes S55. Does anyone know of a currently available custom / stealthy application of a Valentine or other good detector for S class Mercedes? Thanks.