I think that the Yeti that works for the service garage has lost the key to my car. If that is the case, can I call a Mercedes dealer with VINs or chassis numbers and have a new one made? I know most domestic manufacturers do this as well as a Japanese maker or two. It will help a lot and I'll kick myself later for not having a copy made when I got the car. If I remember correctly, MB keys have to be made at either a dealership or a locksmith.