Becker Mexico Cassette AUX input Upgrade by Ken Tyler for W116 : Mercedes-Benz S-Class – 280S, 280SE, 280SEL, 300SD, 350SE, 350SEL, 450SE, 450SEL & 450SEL 6.9
Posted by jpluimers on 2016/09/16
A modification to fit a 3.5 mm stereo socket to the front face of a Becker Mexico Cassette to allow use of mp3 players and the like but still retaining AM/FM radio and cassette functions.
Source: W116 : Mercedes-Benz S-Class – 280S, 280SE, 280SEL, 300SD, 350SE, 350SEL, 450SE, 450SEL & 450SEL 6.9
Interesting…
We’ve such a receiver in our classic car (see 1970 Becker Mexico AM-FM Cassette Car Radio showing operation & sound – YouTube « The Wiert Corner – irregular stream of stuff).
It would be a great way to add AUX to it, but I’d rather not modify the front-panel. Since the 450SEL69 has plenty of room, I will try to see if the above instructions can make the cable external so the AUX connector will be either near the arm rest or the glove compartment.
–jeroen
The Wiert Corner - irregular stream of stuff 
Robert Fuchs said
My father (RIP) had this radio in his 1970 Mercedes Benz 280SE.
jpluimers said
When well maintained they’re still great cars.