The error codes. It could be they are designed to get a level of muck on the sensor from new before they bed in. A shiny new car being more error prone. I dont as I said get the false positives that I first got with activity going on, on the side of the roads like lories turning round, as I said when the car was new. That's settled down. Just leaves wet foliage on bends for a pre warning. It has saved a front impact twice once by the co-driver watching planes in the sky in slow moving traffic round an airport in Germany and once for me on sudden breaking of the car in front as I was checking for traffic coming in on the right (needed two pairs of eyes on that one so front assist helped out). A stuffed up roundabout... will be the exit road so they slammed their breaks on infront of me. Delights of Harlow road network unlike Milton Keynes where roundabout dont get stuffed upIf the camera or radar are out of adjustment then the system shuts off and demands a calibration.