Can anyone tell me what the different colored wires go to? i bought this car, and i am trying to put a radio in it, and i don't know which wires are for what. please help!

Jason

skinnerbox site has the online manuals...

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

thanks for helping, but the links all dead end. any other ideas?
i have a red/green wire, blue, yellow(but it's a very thin one), black, and i think that's it!