If the SmartKey is in the ignition lock in position 0 or 1 or if the SmartKey is not in the ignition lock, the rear screens will switch off after 30 minutes. Before the screens switch off, they show a message to this effect.

You can switch the screens back on.

However, this will discharge the starter battery.

Point the remote control at the rearcompartment screen which has been selected for remote operation.
Press button 1 on the remote control.
The respective rear screen switches on or off.

You can only switch the screens on using the remote control if the ignition is switched on.