General notes

If you cannot lock or unlock the vehicle with the SmartKey, either the battery in the SmartKey is discharged, the SmartKey is faulty or the starter battery is discharged.

SmartKey and replace it if necessary. Check the battery in the SmartKey and replace it if necessary.
mechanical key. Unlock the driver's door using the mechanical key.
mechanical key. Lock the vehicle using the mechanical key.
battery contacts checked at a qualified specialist workshop. Have the starter battery and the battery contacts checked at a qualified specialist workshop.

If the SmartKey is faulty, contact Roadside Assistance or a qualified specialist workshop.

    See also:

    Warning displays
    The warning displays show the distance between the sensors and the obstacle. The warning display for the front area is located on the dashboard above the center air vents. The warning display f ...

    Transmission position display
    The current transmission position is shown in the multifunction display. 1 Transmission position The arrows in the transmission position display show how and into which transmission positio ...

    2012 Mercedes-Benz CLS-Class Review by Carrie Kim
    As I approached the all-new 2012 Mercedes-Benz CLS-Class, I was filled with a mix of elation and bona-fide terror. It's similar to when you walk into a very nice home and the first thing you say t ...