Hello all, I am new to the Audi world. I am an american muscle guy, picked up the A4 to save gas as I travel a lot for work. I have some issues with the car but it is driveable. CEL is on for misfire and lean, car stumble when cold, ABS light is on. I hope you guys can guide me to get his car back to its' glory. Hope to hear from you all soon with help and guidance.