Hi All, I have a Harman Becker sat nav on an 2003 E class W211. It would appear that someone put a music cd in the sat nav slot. When the cd & sat nav disc were removed, the sat nav cd has become badly scratched and is no longer recognised by the reader. I am wondering if the laser reader is damaged and if there is a way of checking this before putting in a new/replacement disc which then may be damaged? Does anyone know of a repairer in the Bucks area or have any other bright ideas please? Many thanks R!