[i have a 2007 s4. Fully loaded black on black. It has been a really great car.

But the last 5 or 6 months i have had to keep bringing it to the audi dealership. About 4 or 5 times a week at random times of the day when i start the car the power steering will not work, for anywhere from 1 minute to 1 hour. The audi dealership has not been able to find the problem. I have dropped it off with them numerous times for a couple days to a week.

Has anyone had this problem or know how to fix it.

Ryan