Sorry, Boleropilot, I may have misread your post. My comments above refer to the Cruise Control radar, not the braking radar.
Funnily enough, just yesterday in a bit of wet weather, I had a warning light (like a rear end collision) and a message something like "automatic braking disconnected". I think it is known generally as collision avoidance system. I think this is in all Koleos models. It can be turned on or off in the Vehicle menu. In reading about it, it mentions a radar sensor behind the front bumper, and the windscreen camera. I cleaned the area of the camera, but there was no mud or anything on the bumper. However, for this trip I am doing, I attached an insect screen across the front of the grille. I wondered if the lower right hand corner of the screen may be in front of the radar, and with a bit of water on the mesh, it may act as a perfect radar blocker?
Anyway, no warning light today.
Funnily enough, just yesterday in a bit of wet weather, I had a warning light (like a rear end collision) and a message something like "automatic braking disconnected". I think it is known generally as collision avoidance system. I think this is in all Koleos models. It can be turned on or off in the Vehicle menu. In reading about it, it mentions a radar sensor behind the front bumper, and the windscreen camera. I cleaned the area of the camera, but there was no mud or anything on the bumper. However, for this trip I am doing, I attached an insect screen across the front of the grille. I wondered if the lower right hand corner of the screen may be in front of the radar, and with a bit of water on the mesh, it may act as a perfect radar blocker?
Anyway, no warning light today.