I own a '94 S320, 101K miles. The SRS light stays on. One time I took it in, they replaced seat belt buckles. The light cleared. but came back a few months later. Next time I took it in the diagnosis was bad seat belt tensioner. I went back after the parts came in but when they installed them the light did not clear. coes were 2, 19, 50, 2, so they took them out. Later, I had some work done at another shop and had the codes checked, this time the codes read: code 018 left side air bag, A63, harness fault. I checked the wires under the seat, all appear to be properly connected. What could be the problem? Will appreciate any help.