Why can't the BMW audio system be unmuted?

[DeSimon]

BMW audio system cannot be unmuted due to incorrect wiring. Here is the relevant introduction: Pursuit: Car audio modification, as the name suggests, is the upgrade of the car's audio system, aiming to meet the car owner's demand for car music; to express the 'audiophile' pursuit of music lovers in the best possible sound field expression within the car's audio space. Specialty: Due to the uniqueness of music, car audio manufacturers produce different types of speakers for different music styles. Therefore, only by clearly knowing the music style you prefer can you choose the most suitable car audio system.