number of card?

  1. M

    Which SD card gps for 2019 C300

    I have 2019 C300 no GPS. I have bought 4 different SD cards off EBay and none worked. I have wide screen but says I need audio 20. How do I know if I have audio 20? I hate dealer so if you know which numbered card I need. I love you. I do use Car Play but my new $1200 iPhone is broken now...


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