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:

    Setting the EASY-ENTRY/EXIT feature
    WARNING Make sure that nobody can become trapped when you activate the EASY-ENTRY/EXIT feature. If there is a risk of entrapment by the steering column, move the steering wheel adjustment ...

    Important safety notes
    WARNING Do not park this vehicle in areas where combustible materials can come into contact with the hot exhaust system. Combustible materials, such as grass, hay or leaves could be ignited ...

    Cleaning genuine wood and trim elements
      Wipe the wooden trim and trim pieces with a damp, lint-free cloth, e.g. a microfiber cloth.   Heavy soiling: use car care and cleaning products recommended and approved by Mercede ...