Welcome aboard !

Over the years, I`ve seen more than a dozen similar cases where the cause of the problem was a coin or two which had slipped down into the shift linkage, jamming things up. Remove the shift boot, and inspect closely with a flashlight.

Your car is an E34, so any future questions should be directed to the E34 Forum.

__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*