Dear Blau...l have a 1999 ML 430...and the rubber moulding around the windows are god-awful....they constantly dis-colour, god forbid you get any wax on this surface...they should have went with a chrome application..much easier to clean....mine got so bad...l replaced them...l was so sick and tired of washing the truck..it looking so great..but the black( or so its suppose to like black)..never looking good....l've tried tons of products...but after a few wahings...back to the same problem....