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: Ensure your car is in a well-ventilated area. Start the engine to prevent the battery from dying during the update, which can take 10–40 minutes.
: Reach out to the website or individual where you downloaded the file for their specific installation readme. sc25289-ICARUpd1240.rar
: Interrupting a firmware flash is the most common way to break an infotainment system. : Ensure your car is in a well-ventilated area