In official Mercedes-Benz XENTRY diagnostic readouts, the code is defined as:
[Physical Press] ---> [Sticky Residue/Mechanical Jam] ---> [Microswitch Stays Closed] | v [No Volts Change] <--- [Central Module Expects Signal Cycle] <--- [B1E9E2A Code Logged]
Gently clean around the button with compressed air to ensure no debris is causing a micro-stick. Diagnostic Clear: mercedesbenz b1e9e2a
Common owner reports include:
The fault may appear as "Current" (Active) or "Stored" in diagnostic tools like XENTRY or SmartDigi. Why It Happens This code is frequently seen on models like the W213 (E-Class) and related platforms (S213, C238). It often stems from: Electronic "Glitch": It often stems from: Electronic "Glitch": The switch
The switch itself might have failed, or the spring behind it is broken.
Replacing the underlying rubber contact pad or individual micro-switch if the plastic button housing is intact. Common Symptoms:
The error usually indicates that the "Favorites" button is "sticking" or that there is no change in the signal when the button is pressed. Common Symptoms: