Golf 7 GTI Steering Sensor calibration

The steering sensor calibration was performed today and the desired stability at center position was obtained at last.
Specific sticky steering feeling at center position had been established on two vehicles, Air-cooled Beetle 1302 with no power assist and TOYOTA Caldina AZT-241W with oil pressurized assisting.
Steering center sticky feeling is accomplished only when Zero-Thrust condition is obtained.
On the other hand, Golf 7 GTI had difficulty to make up the condition, how ever precisely wheel alignment were performed several time, she goes straight but without steering center sticky feeling.
In the middle of last night, some inspiration came into my sixth sense, long period of time was not required to realize "the trick", the signal at steering post, the angular position, is firmly connected with the computer system in combination with another controlling, such as the lain keeping. It means that the signal while straight running should be remembered by the computer with some precision.
I had performed a correction of the Thrust Angle adjustment with 10 minutes discrepancy to plus direction, leading to steering position displacement as 10 minutes, just front tie rod adjustment was not enough, steering shaft angular position should be corrected as before.
This is why the steering sticky feeling at center position could not be acquired, Steering center calibration was indispensable to finish these procedures as a matter of fact.
The information could be found out through Web site as the protocol for VW Passart.
Start the vehicle and turn the steering 360 degree clockwise and return to the original position then turn it 360 degree counter-clock wisely, keep the steering position at that vehicle goes straight  with the speed below 20 km/h for a short distance, without killing ignition for a while. Remember the car battery voltage exceeds 12 V in the setting scenery.
It goes without description that the desirably stable steering feeling at center position was accomplished after the steering center calibration.
Energy's Flowers are fully about to bloom in my garden this morning, I feel far better today than usual, everything goes well!