My mechanic today fitted a rollla manifold to my car. During the process he knocked off the battery and did not connect it back up. When I tried to start the car it wouldn't start, the temperature gauge went above the top, engine manement light came on and the air bag light. He recons it needs resetting as the car will not reconise the key??? Can anyone shed some light on this??? **Please move if in wrong section, couldn't decide which section to post in lol** Thanks Adam