Originally Posted by
Lamprey
Does the problem manifest itself badly (or more noticeably) if you drive for a while, then turn your car off for a few (15 or so) minutes while you go shopping or something and then turn it back on? Mine (MY13) did this pretty regularly. I had to take it to the dealer several times, but I told them that I almost went off the highway due to the issue (which is true) and that I didn't feel safe driving the car and I was to the point that I was going to escalate to AoA or start a lemon law claim. They finally agreed to replace "the rack."
The reason I mention the parking your car and then starting it back up again, is that if that is happening, it's much easier to reproduce than the other seeming random times it manifests it self while driving down the road. Thus it's easier for the dealer to "feel" the problem given that set of criteria and agree there is a problem instead of trying to blame your tires.
Did the new steering rack solve your problem?
I have a 2015 S4 and it has this problem. It sucks. It is most noticeable in cold temperatures. Even on a cold day, the issue tends to go away a bit as the car warms up and sustains a warmer temperature for a while. My specific issue is that the steering wheel feels like it does not want to stay at top dead center.....it wants to shoot to one side or the other. It's the feeling of two same-pole magnets being pushed together - they never want to go together and accelerate to one side or the other. One of my theories is that the electric-assist steering rack is overly sensitive to what is happening on its output, and unless your tire pressures are perfectly even and alignment is perfectly the same side to side, the system will "fight" itself resulting in the resistance for the steering wheel to stay centered.
I have an open case on this with my local Audi dealer's service manager. I took the car there on a 70 degree day and had him drive it around. He said "It feels fine to me", to which I replied "yep, me too. But I'll come back when it's sub-freezing and let you feel how the steering transforms". I still have to do that second part and it's on my agenda for the near future.
I'm approaching it this way because his first reaction was to point to my lowered ride height. I told him I've driven many lowered cars in all seasons and the ride height never affected the steering feel. During a previous visit on a cold day we had taken out a bone-stock 2015 S4 and it exhibited the same vagueness / notchyness at top-dead-center, so that proved it was an inherent issue with the hardware/software, not caused by my aftermarket suspension.
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