@DerHase installed the 2016 Golf R dynamic steering rack in my 2017 Alltrack S. All it needed was the G85 Steering Angle Sensor basic setting relearned in the above video. Woot!
After the G85 Steering Angle Sensor basic settings relearn procedure, we still had a Module 44 Fault “Databus missing message”. Had the same fault when scanning with OBD11.
Checked Steering Assist long coding with OBD11 which showed both “Counter steer support” and “Lane assistant” active (should not be active as my car doesn’t have Lane Assist, but I don't know what Counter steer support does). DerHase suggested trying to change each to “Not active”. I tried this first on Lane assistant and then Counter steer support but the fault still wouldn’t clear.
Drove around the block, relaunched OBD11, scanned the same fault, then re-enabled “Counter steer support”, and was able to clear the Steering Assist fault. Weird, but it worked.
A friend said databus missing message just means something is expecting a response from the module or the module didn’t see a response from another module. If you don’t have lane assist, decode it from 44 using Vagcom. Lane assist is 00A5.