Quick demo :
tuner FM
Recording
Tape play / music search
mp4 player through jack

Remarks :
replaced the original lightbulb by leds (amber, imitation incandescent bulb light 4 for tuner, 2 for vu-meters , 2 in tapedeck.
they run on the original AC power for the lightbulb, hence the flickering which is NOT visible in real life
added light on/off button on the side
Jack is connected internally to DIN IN and stores in the battery compartement, there is a space for 2 AA batteries behind the D-Cells, but it is unused , therefore it leaves some room to store jack and cable allowing for D-Cells to be put in)
power button and volume sliders had their surface paint so worn of that they were just plain uggly...so i cleaned of all original paint that remained and repainted them (enamel model paint, Humbrol)j.

Remark on DIN/jack : there is no real "DIN standard", this german version of this DIN uses pin 1-left 3-right 5-ground....for some reason it only takes very low level - hence the jack + mp4 player on LOW volume (7 out of 40)