I've got a 2001 Millenia, which has been running perfectly. My only problem is with the steering wheel. It has power tilt, so until recently I could adjust it up or down with a lever on the steering column. A week or two ago, the wheel suddenly moved down on its own, right on top of my legs! I cannot move it up or down with the lever. I need to know what happened, and what I can do about it ASAP! I would appreciate any suggestions.