Hi, I'm Jason and will be helping you with your RS4 question
now, this is the circular arrow light?
Can I assume that you have already pressed the "ESP" button?
Holding to see if you're able to respond
ah, understood. And can I safely assume that you don't have an Audi scan tool (vag-com, VCDS, or similar) available to retrieve fault codes from the ABS/ESP computer?
Tough for me to make an accurate diagnosis without at least a fault code. What I can say is that there is likely a problem with one of 6 sensors in the car. There are 4 wheel speed sensors, and 2 acceleration sensors (lateral and longitudinal), in addition to the throttle sensor in the pedal and throttle body
I'd hate to recommend replacing any of them before you know the fault stored
Actually, you'll find that you'll turn better laps with traction control off, fortunately.
A garage will likely charge about an hour's worth of diagnostic labor to scan it
wheel speed sensors are about 100 each
I wish I could offer the magic bullet fix for you on this one. What I can say is that the car is safe to drive in the meantime
Go ahead and drive it without worry. Call a couple of Audi specialists on Monday to get it in for the traction control diagnosis. I have a feeling that it won't be overly expensive for both the diagnosis and repair.
And that's an honorable way to carry on. Nice of you to take care of this for your friend