The diagnostic trouble code (DTC) indicates an issue with the "Favorites" button sticking (jamming), resulting in a lack of signal change . Modern luxury vehicles rely heavily on complex interior electronic modules like the Mercedes-Benz Group infotainment interface. When physical buttons fail to report state changes to the central computing unit, a body control or infotainment sub-system log records this specific body/interior code (B-class DTC).
Use a can of compressed air to blow out any debris lodged in the crevice of the button. mercedesbenz b1e9e2a
Is the "Favorites" button located on the or the steering wheel ? The diagnostic trouble code (DTC) indicates an issue