Just installed seat covers in my 91 500 sl and now I got a seatbelt light on dash and dinging every once in awhile. I looked around to see if I had knocked a wire harness loose, but I'm not 100% familar with my car yet, any idea ? I have narrowed the dinging down to the Passenger side. Tried clipping both belts in and no difference. I'd hate to pay someone $$ to fix a simple thing, especially with a mercedes issue