Closing
•► Replace the fuel filler cap and turn it clockwise. The fuel filler cap audibly engages.
•► Press the fuel filler flap closed until it engages audibly.
If you drive with the fuel filler cap open,
reserve fuel warning lamp 
flashes.
In
addition, the 
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
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:
EASY-ENTRY/EXIT feature (third rowof seats)
Important safety notes
WARNING
To help avoid personal injury, the second-row
seat backrests must be properly locked either
in the upright position or, when using the
expanded cargo vo ...
Safety in detail: Just one star is enough
In line with the Mercedes-Benz brand philosophy, the new M-Class represents
the embodiment of the Mercedes-Benz holistic safety concept of REAL LIFE SAFETY,
which is derived primarily from what ha ...
Setting the rear-compartment airflow
using the rear control panel
Turn the SmartKey to position 2 in the
ignition lock.
To increase/reduce: press rocker switch
14 up or down. ...