The diagnostic trouble code (DTC) specifically refers to a mechanical or electrical failure of the "Favorites" button (often identified as the button with a star icon) on the center console or steering wheel control bank.
According to diagnostic reports from platforms like ROLF Auction, this code typically triggers when the "Favorites" key is detected as , resulting in a "signal change missing" error. Common Symptoms mercedesbenz b1e9e2a
If you need to replace the control unit associated with this button, you can search for genuine parts using your VIN on the Mercedes-Benz Classic Parts Search or through authorized Mercedes-Benz Parts Catalogs to ensure compatibility with your specific model year. The diagnostic trouble code (DTC) specifically refers to
: The button may physically feel sluggish or fail to click back into place after being pressed. : The button may physically feel sluggish or
: Excessive force or internal plastic fatigue can cause the micro-switch to fail. How to Resolve Code B1E9E2A
: If the button feels mechanically sound, a technician can clear the code using a Mercedes-specific tool (like XENTRY) to see if the signal error was a one-time glitch.
: Coffee, soda, or cleaning agents can seep behind the button housing, creating a sticky residue that prevents the mechanical return of the switch.