Mercedes-Benz reversing radar sensor probe A2125420118 high-quality parking sensor

Mercedes W212/W207 chassis owner: rear parking radar eye probe A2125420118 uses ultrasonic to detect rear obstacles and provides distance prompts on dash or buzzer. Replacement fixes false alarms or no response; restores OEM parking safety. If radar calls out in open area or no alert after engaging reverse, probe worn or water ingress; replacement needed.