Guy, Mannyo, Having done further tests with mine it seems as though no matter how many times I check it the value for vertical offset never shows anything other than 0.00 even after I have adjusted it.
For the horizontal adjustment, the value changes on every drive cycle, so it seems as though it constantly learns, the drive back from Norwich was all twisty and i suspect that gave some large offsets, but having tested it up and down the dual carriage way close to my home the readings are not far off.
I do think I need a four wheel alignment done as the steering angle sensor, and yaw rate just wont 0 out.
So that will be a trip to Audi
As for the Vertical adjustment I will make a mirror box that fits over the radar dome so i can bounce a laser level off it and see where it points.
Its a similar method to what Audi would do to calibrate it.
Guy for you if your wanting to get the cover off I found it was a right pain and the answer to getting it off easy and adjusting the horizontal screw is to remove the number plate surround you will then see two hole that you can push an allen key into to depress the cover plate springs.
The adjustment screw is accessed through the left hand hole.
