Interior protection sensor, location/purpose/function - GF80.50-P-4113T

MODEL 211.0 with code (551a) Anti-theft alarm system (ATA) with code (882b) Interior motion sensor (only with anti-theft alarm system) with code (413) Panorama sliding roof

Fig 1: Locating Center Overhead Control Panel Control Module And Interior Protection Sensor

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Interior protection sensor, location	The interior protection sensor (N70/2b1) is located in center of the overhead control panel control module (N70/2).
Interior protection sensor, purpose	The interior protection sensor (N70/2b1) operates as motion sensor and senses motions in the passenger compartment
Interior protection sensor, function	Monitoring interior compartment with aid of ultrasonic signals not specially focussed. In this manner the interior protection sensor (N70/2b1) recognizes entry into the vehicle and can actuate an alarm.