Closing

turn it Replace the fuel filler cap and turn it clockwise. The fuel filler cap audibly engages.
If you drive with the fuel Close the fuel filler flap.

filler cap open, If you drive with the fuel filler cap open, reserve fuel warning lamp addition, the  Check Engine warning flashes. In addition, the lamp may light up. A message appears in Check Engine warning lamp may light up. A message appears in the multifunction display.
For further information on warning and indicator lamps in the instrument cluster, see.

before locking the Close the fuel filler flap before locking the vehicle. A locking pin otherwise prevents the fuel filler flap from closing after the vehicle has been locked.

    See also:

    General notes
    WARNING All categories of messages contain important information which should be taken note of and, where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes-B ...

    Hiding a service message
    X Press the % or a button on the steering wheel. ...

    Rolling with the engine switched off
    WARNING There is no power assistance for the steering and the brake when the engine is not running. Steering and braking requires significantly more effort and you could lose control of the ...