I am getting ready to replace my '82 SD's stock Becker with a aftermarket CD head unit. The Becker is missing some buttons and has the annoying habit of going to full volume on a whim, and then not responding to the volume controls.

My questions are:

1) Is there an adaptor harness that I can plug in to the factory harness? A search here said you could get one from crutchfield, but they say none is needed.

2) do I need to bypass the center fader? There is no factory amp in this car, correct?

3) do I need to replace the factory speakers? I have read that they are 8 ohm and will not work properly with a aftermarket head unit that is expecting 4 ohm speakers.

Thank you

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

I saw a picture of an adapter harness you could buy from mercedes, let me see if I can find it...

Found it! Check this bad boy out:



-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Thanks. I found the crutchfield adaptor too: http://www.crutchfield.com/p_120701860/Mercedes-Receiver-Wire-Harness.html

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Anybody have any input on my other two questions?

Thank you,

-Bryan

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

There is no factory amp in the vehicle, you can connect the speakers straight to the head unit.

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2005 SL65
1999 E300
1995 E300
1994 SL320
1988 560SL
1987 300TD
1982 300D
1955 300SL

Thank you. Any body know if the stock speakers will work fine with an aftermarket head unit? I am thinking about the JVC KD-HDR20. It seems fairly clean and not to "blingy"

http://www.crutchfield.com/p_105KDHDR20/JVC-KD-HDR20.html

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

that unit will work fine I have an older JVC in my w123 and it works perfectly ok

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2005 SL65
1999 E300
1995 E300
1994 SL320
1988 560SL
1987 300TD
1982 300D
1955 300SL

1. That MB harness looks slick, do that. I've never seen that until now. Anyone have a price on it?

2. That harness should bypass it since there are four outputs. No factory amp, that started around '88.

3. I would they're 25 years old, paper cone.



I wouldn't even use the aftermarket radio for power but that's me. It's limited in range and full of distortion, but anything will be better than the Becker you're accustomed to. Great quality small amplifiers are dirt cheap and sound fantastic.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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