My wife was driving my 82 300D Saturday. Air conditioning was working fine (as fine as it gets). She turned it off and when she re-started it, it immediately went to full fan, full heat. I checked and the compressor is not turning when air conditioning is selected. Also, the seatbelt buzzer stopped working as well as the tach. Could this be electrical in nature?

Thanks

__________________
Dave

1982 300D
352,000 miles