TECHNICAL SERVICE BULLETIN: SERVICE ACTION: PREMIUM GEN 2.0 HEAD UNIT SOFTWARE UPDATE (SA443) - This bulletin provides information to update the head unit software (S/W) on some 2020MY K900 (RJ) vehicles produced from June 25, 2019 through July 2020, equipped with Premium Gen 2.0 head units, which after saving radio presets, some of the radio presets may delete after the head unit reboots.
