In researching possible mods to the 1492s in my W140 chassis cars, I looked at 
the CD changer inputs and determined that they cannot be used for auxiliary 
inputs.  This is due to the need for a signal to be coming back from the 
changer for the changer input to be active.  It’s not something you can “fake”, 

I believe the Becker folks do it by connecting to the tape head on the cassette 
player section in order to get it to work.


> On Jun 18, 2015, at 10:39 PM, Meade Dillon via Mercedes 
> <> wrote:
> Jaime,
> The aftermarket Sony radio in my '87 wagon finally died, and whomever
> installed it really hacked up the factory wiring.  Some of the original
> connectors appear to be there, I found two.  Looks like the factory radio
> should have been a Becker Grand Prix, model 754.
> I've got a spare Becker 1492, which I'd like to install.  This afternoon I
> went by a local pick-n-pull and from a W202 I cut the radio connectors and
> about a foot of the factory wiring, so I have connectors that fit into the
> back of the 1492 including the CD changer port.
> Q1: What to do with the nearly-dead fader switch in the center console?
> Should I bypass, or bite the bullet and get a new fader switch.  If bypass,
> have you got a wiring diagram?  I have already tried a thorough cleaning
> with De-Ox-It, which helped a little, but it is still pretty miserable.
> Q2: The 1492 has a connection port for a CD changer, but I have no such
> thing in the wagon.  Have you a wiring diagram so I can make an aux input
> connection?
> -------------
> Max
> Charleston SC
> _______________________________________
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