I have this BLAUPUNKT AUTORADIO out of a 1970 200D since my Becker died in my 220D I thought I would use this to replace it I am trying to find out how to wire it up for a bench test. It has a 6-pin connector in the back, which I have about a foot of the cable that plugs in to it was cut when the radio was removed. There is also a yellow wire, which I assume is always hot near that there is a length of red wire coming out the rear of the radio. The wire that plugs into the 6 pin connector has 3 insulated wires white green and brown plus a bare copper wire wrapped around the other wires Ground? I have 2 questions 1 does any body have a clue which wire should be power, ground, and speakers. Two I have searched the world for information on this radio and can find zilch did Mercedes ever use the blaupunkt radios in the late 1960 or early 1970 or was this a aftermarket radio some one installed. I know these are probably dumb questions but I have searched with no luck and would really appreciate any help at all
Thanks in advance
Dave S

i had a 61 190sl with a bluapunkt but may have been dealer installed. regarding your wiring question, take the case apart until you can visually inspect the wire bundle connections to the circuit board the hot and ground can be identified with an ohm meter. hot wire will be common with lighting circuit. ground will be common to case. i wouldnt think the yellow wire is always hot as there are no memory circuits in this radio. speaker grounds will be common to case, remaining wires are speaker hots.

Thanks I will take it apart and figure out the wiring as you suggest pretty smart way to figure it out boy I feel kind of dumb.. Has any one else heard of Merceded using Blaupunkt autorario in the late 1960 or eraly 1970 all I have found is pictures of the radio with ??? for a name at several radio repair places seems the pro dont even know what to call it.
Thanks
Davve S