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1979 450SL
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Discussion Starter #1
Hi All:

I need some help in re-nstalling the original Mexico cassette radio in my 1979 450SL. Currently a newer (2002) Becker CD/radio is
installed and I want to return the car to its original equipment. One attached wiring diagram is for the current radio (A Pin connections (Power) are the ones I need help on; I have figured the B speaker pins). The other attached figure is how the Vintage Becker cassette should be wired between the amp and radio and car.

The wiring connections as they stand are:


Mercedes Wire Yellow connected to (2002) Becker A4
one Red&Blue colored connected to(2002) Becker A5 and A6
second Red&Blue colored connected to(2002) Becker A7
Brown split both ends connected to (2002) Becker A8

Now, the RED&Blue A5 appears to run up to the independent antenna height adjustment switch below the AC vents (is this 12V ignition connection) ?

I believe the other half (?) of the red&blue may go to the power antenna

I believe the yellow wire is from the battery 12v

Brown A8 is ground


In the vintage radio I need to know if I connect the yellow to radio power?


Then do I connect both of the red&blues and the antenna power output wire from the external AMP together for the Vintage radio ?


There is another set of wires from the mexico cassette that plug directly in to the AMP with a multipin plug (no problem)


The speaker wires also plug into the Amp again no problem


Any help in solving this puzzle would be appreciated. I am not real strong in electrical.



Bill
 

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One of the BW Old Guard/R129, W204 Moderator
1997 SL500- 40th Anniversary
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7,149 Posts
I don't recall any 107 having a separate head unit/amp configuration. Here is a website with a good bit of becker info, but it only covers radios back to 1981... Becker Radio Information maybe others can offer better support.

Good luck sorting it out.
 

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1979 450SL
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10 Posts
Discussion Starter #4
Update on wiring 450SL Mexico Cassette

I have confirmed all the wire identities in the previous post by using a voltmeter. The only thing I still am not sure of is where the antenna power wire from the Mexico AMP behind the glove box connects to?

Right now it is just a cut black wire coming from the AMP since the current radio has an internal AMP.

Thanks,

Bill
 

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'80 450SLC Afro RHD Ikonengold
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2,791 Posts
I don't recall any 107 having a separate head unit/amp configuration. Here is a website with a good bit of becker info, but it only covers radios back to 1981... Becker Radio Information maybe others can offer better support.

Good luck sorting it out.
I thought the same.
Someone here said that was a bad thought.

I am still not convinced that any 107 came with 2pc units

--------------------------------------------

@ wojo1966

If you browse this forum, I recently posted pic of colour coding and wiring diagram for original installations.
 

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79 450 slc ( 79 450 sel Sold )79 Lincoln Versailles 59 T-Bird conv.
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71 Posts
antenna wire

Hi: I have a 79 450 slc and yes it had the two piece stereo system It had to be OEM as the amp has a special mounting bracket that could have only been installed when the car was made. The antenna power wire plugs in the back of the amp as in your diagram with a female spade connector.
 
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