As I have a 2007 300c CRD with a damaged grey leather drivers seat I am contemplating swapping it over for another from a breakers yard. Our local car upholstery guy won't repair it for some reason. Is there a set procedure to remove the drivers seat? Should I disconnect the battery (if I do will I have to somehow enter codes into the REJ sat nav unit? - I don't have codes to do this) I want to avoid further complications with sat nav codes and error messages that would need to be cleared by a mechanic. Many thanks in advance. Dave