Accessory position, i.e. ignition off, radio on (for a drivein)

[David Crozier]

We like to go to the drive in. Need to shut off engine, have no interior lights on, but radio playing. We know you can turn off the touch screen using settings, and we figured out you can turn the radio on with the engine off just using the radio power button. but here is the problem, the radio only seems to play for about 10 mins in that mode, then shuts off. Once it shuts off, pressing the power button does not seem to turn it back on. Only way we could figure to turn it back on was to hit the eng start button, which off course turns on the running light, not cool every 10 mins at a drive in. What we want is just the old manual accessory position, you know, battery on, radio, window works, all lights off, and stays that way until we say stop. Thanks