The leather cover on one of my 85-s twisted like that. It's common when the filler inside starts to turn to brown muck.
The radio is a full touch pad radio except for the equalizer sliders. I think it first became available in 85. I have 3 or 4 of them out in the garage. The snap membrane would eventually fail and functions failed to work at all or they worked at full blast. I had one that the volume went to the max on it's own and couldn't be minimized. Another one had a balance button that failed and it went totally to the right side.
The best thing about them is that they had a high quality Blaupunkt tape deck and the radio had a power boost button. That was the early subwoofer sound that boosted the bass sound.
