c180 w203 autobox problem
 

Good Evening, I have a c180 w203 auto 2002,with a problem.
It started by when I put it in either N or P it moved forward a little but not quicker if I revved, I put up with that untill I got home and put it in reverse,nothing,I then put it in drive, nothing. I took the key out and and tried to restart nothing,it was stuck in gear. It is now out of gear after battery disconnection,but the key does nothing at all,
Has anybody any idea what it could be