I have a 1997 A8 Audi V8; that has 153,104 miles and when I'm driving my car starts to jerk, only sometimes. Like when I'm driving up hill or driving in between 40 miles or 25 miles. And my air bag light just turned on, why would it just turn on?
Is the check engine light on too? I'm wondering if it might the a BCM/traction control/ABS style problem for the jerking rather than an engine issue. The air bag light could be the cause of something else having a problem. Have it scanned for ALL codes (body, engine, powertrain) and get back with the results.