Old topic, but renewed interest...
I have noticed on Becker website that the DIN cable connector does not work with the cassette models. They say that Becker Mexico cassette has only a mono jack.
Here's a direct quote:
"The cable is inserted into the external jack on the rear of the radio (note: option is only available for non cassette units. Mexico cassette and Europa cassette units only have a mono jack on the rear also Mercedes model 110, 111, 112, and early 113 Coupe can only use this option)."
Does this mean it will not work at all with the cassette models, or it will not be able to play in stereo mode?
I think 66andBlue has an excellent point regarding the DIN cable, instead of splicing the cable just add an extension to it.
Thanks.