I read that with the new A3, the amount of steering boost is stored in a long code. I haven't been able to figure out where exactly it's stored with respect to the A3, but also curious if this would be the same or similar (but located elsewhere possibly) in the B7 A4.

Anybody know whether this exist or not? I wouldn't mind making the steering less lighter at low speeds.

There is no chance to alter that settings in a B7.