Thanks to both of you for your responses!
However, I decided that, as much as I like the OEM look, I'd rather not pour $$ into the stock unit. So, I think I'm gonna take that Radio Shack radio and put it in the car.
So, back to my other questions...what wire is what in the stock harness(es)? The antenna wire's a given, and I think I know which wires are for the speakers...although I don't know which wire is for left and right, and don't know which is hot and which is ground. Also, which (front or rear on the "new" radio) speaker wires should be wired into the wires going to the fade control? Lastly, can the fader handle the bit of juice this radio'll put out without melting? I don't want a hole where the fader is, but I don't especially want the fader to stay there "just to fill the hole" either...if running 30x4 watts of juice through the fader's not at a critical level, I'd just as soon go that route.
ALso, this isn't quite Benz related...I was thinking about putting a
Sanyo FXCD-500 CD/cassette radio in the pickup. Does anyone know if this is a decent unit or not? I like the layout and that it can do tapes and CD's; in spite of the green face, I'd put it in the Benz except the website says that it won't fit for some reason...maybe it's too long? It does say it'll fit in the pickup, though...which also has a DIN face.
Thoughts appreciated. Thanks!