general problems of the 1997 Jaguar XK8

While driving the vehicle the drivers seat suddenly began moving forward with the seat back leaning forward as well. This forced me up against the steering wheel almost crushing me. I tried to use the seat controls to stop the movement and return the seat to it's proper position but the swich overheated and caught on fire. Thankfully I was able to stop but had I been driving at highway speeds this could have been a disaster.