I recently bought a 96' E320. The problem I am having now is the key won't come out of the ignition switch when I turn it off. I tried to jiggle it, it won't bulge. When it does, i try a different key and it get stuck when I turn it off and it won't come out. What could it be?

Try a search - there's lots of stuff on this.

I had the same problem for my 1993 W124 model. I replaced the tumbler but the problem still existed. Later a kind soul in this site enlightened me.

Try to push your gear lever to park and give a slight push or tap forward. If you can pull your keys easily by doing this, then you will need to do some adjustment to cable that connects the gear selector to the ignition tumbler. No messy or difficult job needed.

The W124 and some models(I don't know what are the ones) need the gear selector to be accurately positioned at Park before the keys can be pulled out. Good Luck!

Cheers