[GaBill]

Look very soon for it to start chiming again. It is the pretensioner on one of the five seat belts in your towncar drying out and going bad. When it starts again to to a trusted mechanic and have him put a test on the airbag system to tell you which seat belt, that's the only way to tell which one is bad. That pretensioner will have to be replaced. Don't go to a dealer, they will tell you it is illegal to repair it. Come back here if it comes to getting it fixed.