To avoid transporting already opened refill con-
tainers in the vehicle, completely empty refill
bottles or canisters when filling the DEF tank, ifpossible.
For further information on DEF, see
(
Ypage 361).
Opening/closing the DEF filler cap
XTo open: switch the ignition off.
XPress the fuel filler flap in the direction of
arrow:.
The fuel filler flap swings up.
XTurn blue DEF filler cap ;counter-clockwise
and remove it.
DEF filler cap ;is secured with a plastic
strip.
XTo close: place DEF filler cap ;on the filler
neck and turn it clockwise.
XTo close the fuel filler flap, press it in the
direction of arrow :.
XDrive faster than 10 mph (16 km/h).
TheRefillAdBlueSeeOperator’sMan‐ualmessage goes out after approximately
one minute.
If the Refill AdBlue See Operator’s Man‐
ualmessage continues to be shown in the mul-
tifunction display, you must add more DEF.
iThe fuel filler flap is unlocked or locked
automatically when you unlock or lock the
vehicle.
DEF refill canisters
!Do not screw the disposable hose on too
tight. The disposable hose could otherwise be damaged and DEF may leak out.
XUnscrew the cap from the opening on top of
DEF refill canister ;.
XPlace disposable hose :on the opening of
DEF refill canister ;and screw it on clock-
wise until hand-tight.
Disposable hose :remains closed until you
fasten disposable hose :to the DEF filler
neck of the vehicle.
XPlace disposable hose :on the filler neck on
the vehicle and screw it on clockwise until
hand-tight. When you feel resistance, dispos-
able hose :is sufficiently secured.
XLift up and tip DEF refill canister ;.
Filling stops when the DEF tank is completely
filled. Do not fill the DEF tank any further. DEF
refill canister ;can be removed when it has
been only partially emptied.
XTurn disposable hose :on the filler neck of
the vehicle counter-clockwise and remove it.
XTurn disposable hose :on the opening of
DEF refill canister ;counter-clockwise and
remove it.
XReseal DEF refill canister ;with the cap.
DEF refill canisters are available at many gas
stations or at a qualified specialist workshop.
DEF refill canisters are often sold with a filler
hose. A filler hose that does not exactly fit the
vehicle's DEF tank offers no protection against
148Refueling
Driving and parking
XIf there is more than one number for a
particular name:press the6ora
button to display the numbers.
XPress the :or9 button to select the
number you want to dial.
XPress the 6ora button to start dialing.
or
XTo exit the telephone book: press the~
or % button briefly.
Redialing
The on-board computer saves the last names or
numbers dialed in the redial memory.
XPress the òbutton on the steering wheel
to open the menu list.
XPress the :or9 button on the steering
wheel to select the Telephonemenu.
XConfirm by pressing aon the steering
wheel.
XPress the 6button to switch to the redial
memory.
XPress the :or9 button to select the
desired name or number.
XPress the 6ora button to start dialing.
or
XTo exit the redial memory: press the~
or % button briefly.
Assistance graphic menu
XPress the òbutton on the steering wheel
to open the menu list.
XPress the :or9 button on the steering
wheel to select the Assistance Graphic
menu.
XConfirm by pressing aon the steering
wheel.
The assistance graphic displays the status of
and information from the following driving
systems or driving safety systems:
RDistance display of DISTRONIC PLUS
(Ypage 163)
RTraffic Sign Assist (Ypage 188)
RDistance warning and the autonomous
braking function COLLISION PREVENTION
ASSIST PLUS (
Ypage 66)
RPRE-SAFE®Brake (Ypage 72)
RBlind Spot Assist (Ypage 188) or Active
Blind Spot Assist (Ypage 192)
RATTENTION ASSIST (Ypage 187)
RLane Keeping Assist (Ypage 190) or Active
Lane Keeping Assist (Ypage 195)
XPress :to display the ATTENTION ASSIST
assessment.
Service menu
Introduction
Depending on the equipment installed in the
vehicle, you have the following options in the
Service
menu:
Rcalling up display messages in message mem-
ory (Ypage 222)
Rrestarting the tire pressure loss warning sys-
tem (Canada only) (Ypage 337).
Rchecking the tire pressure electronically
(Ypage 339).
Rcalling up the service due date (Ypage 304).
Rdisplaying the DEF level and range
(Ypage 214).
Displaying the DEF level and range
XPress the òbutton on the steering wheel
to open the menu list.
XPress :or9 on the steering wheel to
select the Servicemenu.
XConfirm by pressing aon the steering
wheel.
XPress :or9 to select the AdBluesubmenu.
XPressato confirm your selection.
The range and DEF level appear in a bar graph
in the multifunction display.
214Menus and submenus
On-board computer and displays
