General notes

If the vehicle can no longer be locked or unlocked with the SmartKey, use the mechanical key.

If you use the mechanical key to unlock and open the driver's door or the trunk lid/ tailgate, the anti-theft alarm system will be triggered.

There are several ways to turn off the alarm:

•► To turn the alarm off with the SmartKey: press the button or on the SmartKey. button on the SmartKey.
or
•► Insert the SmartKey into the ignition lock.
or
•► To deactivate the alarm with KEYLESSGO: press the Start/Stop button in the ignition lock. The SmartKey must be in the vehicle.
or
•► Lock or unlock the vehicle using KEYLESSGO.

The SmartKey must be outside the vehicle.

If you unlock the vehicle using the mechanical key, the fuel filler flap will not be unlocked automatically.

•► To unlock the fuel filler flap: insert the SmartKey in the ignition lock.

    See also:

    Control panel for dual-zone climate control
    Canada only 1 Sets the temperature, left 2 Defrosts the windshield 3 Switches the ZONE function on/off 4 Activates/deactivates cooling with air dehumidification Activates/deactivates the residu ...

    NECK-PRO luxury head restraints
    If you have difficulty resetting the NECKPRO luxury head restraints, have this work carried out at a qualified specialist workshop, e.g. an authorized Mercedes- Benz Center. Remove resett ...

    Downshifting
    Briefly press the selector lever to the left towards D–. or Pull the left-hand steering wheel paddle shifter. The automatic transmission shifts down to the next gear. If you brake the vehic ...