Gross
I just removed my radio to replace it with a MP3 / CD player and found it only has 2 channels, one channel for the left side and one for the right.

Anyone know where these wires are spliced together so I can separate them to make it 4 channels without rewiring the whole sound system.

Thanks

Almost forgot

My car is a 1984 300D

If you have a separate fader control then there is no need for the 4 channel from your head unit. You can either rewire all the speakers, or go from the fader control. Good luck!

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Brian W. Heitman

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The wires split at the fader in the shifter console. For mine I ran new wires to the front speakers and used the existing wires to feed the fader. Eventually I will run new wires to the rear speakers as well.

Of course I replaced the front speakers and have new ones for the rear as well.

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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter.
'84 300D Turbo 240k (Anthracite Grey) - Garage Queen
'83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver

I'm not a certified mechanic, but I did stay at a HolidayInn Express last night.

I completely forgot about the fader

Do you know what size the front speakers are
No big deal if you don’t know off hand because I will be looking at them soon enough when I install my new dash cap.

Thanks

I'm pretty sure you will need to remove the fader from the speaker circuit. If you check your aftermarket MP3/CD player, it will warn you about using 'common' speaker wiring (see the diagram in this post...it's blurry, but you can make out the speaker-to-fader wiring easily Power antenna for w140 to fixed mast? ).

In my set-up, I extended and ran the existing wires for the rear speakers to the new HU, as separate pairs. The front speaker wires were long enough to simply re-route to the HU without extending them. I left the fader switch in the consol disconnected.

IMO, the factory speaker wires are big enough to handle anything the HU can deliver. The speakers are crap, though, so I replaced mine all round.

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1986 560SL
2002 Toyota Camry
1993 Lexus

Agreed.... remove that factory fader. In my w124s, I removed the entire wiring loom associated with the factory fader set-up. The thing was so buggered up on the wagon that the thumb control would loose its contact with the plug and actually cut out all 4 speakers

- Mark

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1987 300DT 127K
1987 300TDT 283K (Sold)
1999 528iTa 75K
1991 300D 2.5T 214K - Dead Tranny
1984 300DT 375K (Sold)