Originally Posted by 83w126

I have owned two W126s, a W210 diesel and a W220, and an OBD2 scanner will do almost nothing on the newer cars. It's definitely doable if you want to take the time to learn, but you need the actual Mercedes diagnostic software ($600-$800? I haven't looked in a while) and to know how to use it to be able to deal with the issues the newer cars have. I find the 300SDL far less frustrating to keep running and usable.