Hi Terry, my son recently had same issue on his 2021 Superb, he had driven over some bumpy roads and got the same caption. We couldn't get to the radar unit from the top, so took the front bumper off, a few screws but quite straightforward, left all electrics connected. Radar unit is secured to the back of the grill in the centre, it was all secure, electrics sound. Refitted bumper and Carried out system reset using OBD 2 plus pro VW package, all ok since 2 weeks. Follow YouTube "ACC Calibration at home" some guy recalibrated it on his Audi. When we checked our radar unit the Vertical Angle was reading 1.743, max is 0.8 degrees. Skoda along with many other manufacturers have this recurring problem, it doesn't help matters fitting the Radar unit on a plastic flexible front bumper trim. There's lots on You Tube. Hope this helps!