Switching on the power supply or ignition using the start/stop button
WARNING Risk of accident and injury due to children left unattended in the vehicle
If children are left unattended in the vehicle, they could:
open doors, thereby endangering other persons or road users.
get out of the vehicle and be hit by oncoming traffic.
operate vehicle equipment and become trapped, for example.
In addition, children could also set the vehicle in motion, for example, by:
releasing the parking brake.
shifting the automatic transmission out of park position
. starting the engine.
Never leave children and animals unattended in the vehicle.
When leaving the vehicle, always take the key with you and lock the vehicle.
Keep the key out of the reach of children.
Requirements:
the key is located in the vehicle and the key battery is not discharged.
the brake pedal is not depressed.
To switch on the power supply:
press button 
once. you can activate the windscreen wiper, for example.
The power supply is switched off again if the following conditions are met:
you open the driver's door
you press button
twice.
To switch on the ignition:
press button twice. The indicator lamps in the instrument cluster light up.
The ignition is switched off again if one of the following conditions is met:
you do not start the vehicle within 15 minutes.
the transmission is in position
or the electric parking brake has been applied. you press button
once.