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:

    Style
    There are just two elements that could account for that price difference: The CLS' more advanced V-8 engine and its darn appealing, elegant design. Like most new Benzes, the CLS features a large, ...

    Playback options
    Further information on playback options is available in the "Audio" section. Select CD, DVD-A or MP3 using the buttons on the remote control and press the button to confirm. The ...

    Unlocking the driver's door (mechanical key)
    If the vehicle can no longer be unlocked with the SmartKey, use the mechanical key. If you use the mechanical key to unlock and open the driver's door, the anti-theft alarm system will be trigg ...