I have a 2014 Cla 250 4matic this happening on and off but recently it just stay like this in the past 2 weeks. Please let me know how to fix this problem. Let me begin what happening to the car, I can put in a drive position and drive the car but when i want to park the car which i can not put it back to P position, so what i have to do is opening the door and the gear automatically switch to P position. This problem has been on and off in the past 6 months and sometimes it took 2 or 3 days to be back to normal. If any one know or happening the same thing please advise. Thank you very much.