Automatic interior lighting control
To switch on/off: press
the 
button.
When the automatic interior lighting control is activated, the button is flush with the overhead control panel.
The interior lighting automatically switches on if you:
• unlock the vehicle
• open a door
• remove the SmartKey from the ignition lock
The interior light is activated for a short while when the SmartKey is removed from the ignition lock. You can activate this delayed switch-off using the on-board computer.
See also:
2010 Mercedes-Benz GLK-Class Review
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Charging the battery
WARNING
Never charge a battery still installed in the
vehicle unless a battery charger unit approved
by Mercedes-Benz is being used. Gases may
escape during charging and cause explosions
...
Child-proof locks for the rear doors
WARNING
Children could open a rear door from inside the vehicle. This could result in
serious injuries or an accident. Therefore, when children ride in the rear always
secure the rear doors ...