See also:

Opening the DEF filler cap
The filler neck for DEF is behind the fuel filler flap. The fuel filler flap is unlocked or locked automatically when you open or close the vehicle with the SmartKey or with KEYLESSGO. - Swi ...

Interior: carefully selected materials and first-class finish
In the interior, too, Mercedes-Benz developers and designers perfected the Mercedes-Benz CL-Class, paying careful attention to detail. A total of four different kinds of fine wood open up the poss ...

Closing
Replace the fuel filler cap and turn it clockwise. The fuel filler cap audibly engages. Close the fuel filler flap. If you drive with the fuel filler cap open, reserve fuel warning lamp ...