You just beat me to it Tony and I agree with you

Radar sensors (usually infa red and calibrated at the factory) are set in the centre of the grill or top of the windscreen, so should not need calibrating unless frontal damage or windscreen replacement, they will detect directly what is in front of the vehicle, distance and speed (or deceleration)

Adjusting the steering alignment (so long as no impact damage has occurred) should have no bearing on the sensors ability to carryout its function

These vehicles are being tracked up and down the country by fast fits / tyre centres who probably do not have a clue these systems are fitted. VW would be obliged to put big stickers in a prominent place to warn repairers to seek advise or refer to dealer before adjusting wheel alignment

VW quoting over £200 to adjust probably to carryout an unnecessary calibration (unless involved in an accident), knowing it's probably only needs a tracking tweak. A customer would not have a clue if it's required or not, dealer would tell them yes as it's a SAFETY ISSUE ..... easy money

Peter