I have a 1980 300SD in which was installed an aftermarket (Blaupunkt) radio. The left front speaker is the only one which currently works. I have checked continuity on the other speakers: there appears to be none. I also receive only a couple of stations, suggesting the antenna connection to be poor. I suspect that all of these connections were violated when the previous owner had the car repainted. Where do the wires for the other three speakers run? what would be the easiest way to access the speaker and re-establish wiring to the radio chassis?
Thanks,
-Steve-