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For the first phase (up to 20 minutes) of the software update, the ignition needs to be in the ON position until complete. The second phase (up to 70 minutes) will happen automatically on your touchscreen no matter what position the ignition is set to. You need to have your vehicle in the park position, or have the vehicle in neutral with the parking brake engaged if equipped with a manual transmission. The engine does not need to be running, however, the ignition must be in the ON position. The vehicle shoul