Ah! Grouch, the joys of bedding in a new car.
The front radar sensor is, I think, fitted behind the radiator grill.
It may have got covered in ice or crud of some sort. I hate the
DSC, as I mentioned before it nearly rammed me into a car I
was overtaking, I must have moved out of lane too quickly or
more likely moved quickly without signalling in advance.
Ken.