Steering jerks left and right on it's own while driving. on 2010 Audi A3 Quattro

Problem is constant at both high and low speeds. Dealer says everything is fine since the service computer shows no problem. Have requested the tech test drive it with me next week. In the meantime, any help appreciated. Thanks

Asked by for the 2010 Audi A3 Quattro
I am having this EXACT same problem with a 99 Ford Escort - no reason for it. I've had an alignment; rotated back to front tires and replaced a wheel bearing. Now were trying tie rods. Anyone know?