Actually the hole in the dash is the same size for this radio. It has the correct vintage look, and is a good alternative but not exactly original with the casette. This unit first appear a year or two after the Pagoda and was quite popular in the W107 SLs. Changing back to a earlier version should be no problem at all. However, it looks original to all except the expert observer. I would not hesitate to use it except for concours shows.