Using the SmartKey

driver's door handle. The SmartKey must be close to the driver's door handle.

door handle. Point the tip of the SmartKey at the driver's door handle.
the Press and hold the the button until the side windows and the sliding sunroof or the panorama roof with power tilt/sliding panel are fully closed.
sliding sunroof or panorama roof with Make sure that all the side windows and the sliding sunroof or panorama roof with power tilt/sliding panel are closed.

On vehicles with roller sunblinds:
roller Press the roller button again until the roller sunblinds close.
button. To interrupt convenience closing: release the Using KEYLESS-GO button.

    See also:

    Important safety notes
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    Driving with summer tires
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    Roadside Assistance button
    Open the stowage compartment under the armrest. Press and hold Roadside Assistance button 1 for more than two seconds. This initiates a call to the Mercedes-Benz Customer Assistance Center ...