We had an SRS warning light go on, too, and I have to give credit to our dealer, EuroMotors of Germantown, Maryland, for its good service. The SRS light means that anything in the seat belt restraint system could be malfunctioning. We called in advance and made an appointment for service; it took the dealership about two hours to diagnose the exact problem, while we went out to lunch.
They insisted on keeping the car until it was fixed. (I'm sure that's a legal problem -- imagine the lawsuit if they let a car go with a seat belt they knew was defective, and the owner had an accident.) Replacement parts had to be airmailed from the factory, so it took a week for the repair to be done. But the dealership gave us a loaner from the Enterprise rental car counter in the building. We could have had a regular compact car for free, but we chose the $10-a-day upgrade to a Mercedes C-class. All-in-all, the experience wasn't bad.