In rare cases on W204/W212 chassis built between 2011-2014, a software glitch in the Electronic Ignition Switch corrupts the occupant recognition data. Mercedes issued a recall (Campaign 2015030001) for a software update to address this.
While the repair can seem expensive—often requiring a new seat mat and dealer-level programming—it is a fraction of the cost of medical bills from an airbag that fails to deploy. Do not try to simply mask the code with tape on your dashboard. Diagnose the mat, check the wiring, monitor your vehicle's voltage, and execute the proper repair. mercedes-benz b124e95
The gear selector sends a specific CAN-bus signal indicating the position (P, R, N, D). If the potentiometer inside the shifter wears out, it may send a "wobbly" signal—perhaps fluttering between 'D' and 'N' momentarily while driving. The Ignition Switch (N73) receives this signal, compares it to the vehicle speed and RPM, and flags it as implausible. In rare cases on W204/W212 chassis built between