I must have over torqued the oil pan drain plug in a 1995 S 420. (so much for torque wrenches users). The drain plug turns in either direction using a socket, but will not snug or back-out.

Working on jack stands I tried using a vice grips to tug downward on the plug while turning in counter clock wise. This did not remove the plug. This problem is becoming a small annoyance, since I am losing a few drops of oil each day.

I hate to pay to replace the oil pan since this involves raising the engine to remove the pan.

What can I do to try to remove the plug (and see if the plug threads are stripped rather than the threads on the pan?