I also had a '78 280SE. Can't help you with the stereo question, but thought I'd compliment you on the sweet paint job. Very subtle, very trick. Mine was gold, which I loved. But the dark blue is very pretty as well. Hope you figured out a way to get some more "go" to go with the "show"!

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Mike in Denver
'93 400E Now DEAD - Rear ended and totalled.
Replaced by '02 C32 AMG - FAST!