Page 243 of 557

The operation of
thefo llowing sy stems depends
on the trailer being connected cor rectly:
R ESP ®
R Parking Assist PARKTRONIC
R Parking Pilot
R Blind Spot Assist or Active Blind Spot Assi st
R Active Lane Keeping Assist
Coupling up a trailer
* NO
TEDama getothe battery due tofull
dischar ge Charging
the trailer battery using the po wer
supply of the trailer can damage the batter y. #
Do not use the po wer supp lyto charge
th e trailer batter y.#
Remo vethe pr otective co vering from the ball
head and store it in a safe place. #
Position the trailer on a le vel sur face behind
th eve hicle and couple it up totheve hicle. #
Open the soc ket co ver. #
Insert the plug connector with lug 1into
groo ve3 onthe soc ket. #
Turn bayonet coupling 2around clo ckwise
to thestop. #
Let the co ver engage. #
Secure the cable tothe trailer with cable ties
(if you are using an adap ter cable). #
Make sure that cable is alw ays slack for ease
of mo vement when cornering. #
Check the trailer lighting sy stem. Push the
combination switch up wards/down wards and
check whe ther the cor responding turn
signal light on the trailer is flashing.
A display message may appear in the multifunc‐
tion display even if the trailer has been connec‐
te d cor rectly:
R LEDs ha vebeen ins talled on the trailer light‐
ing sy stem
R the cur rent has fallen below the trailer light‐
ing sy stem's minimum cur rent (50 mA)
% Accessories can be connected tothe perma‐
nent po wer supp lyand the po wer supply that
is swit ched on via the ignition lock with max‐
imum po wer consum ptions of 180W.
Un coupling a trailer &
WARNING Risk of being crushed and
becoming trapped when uncoupling a
trailer
When uncoupling a trailer wi than engaged
ine rtia-activated brake, your hand may
become trapped between theve hicle and the
trailer dr awbar. 240
Driving and pa rking
Page 247 of 557

Instrument display
overview &
WARNING Risk of accident due toan
instrument display malfunction
If th e instrument display has failed or mal‐
functioned, you may not recognise function
re strictions applying tosaf etyre leva nt sys‐
te ms.
The operating saf ety of your vehicle may be
impaired. #
Drive on carefull y.#
Have theve hicle checked immediately
at a qualified specialist workshop. If
th e operating saf ety of your vehicle is
impaired, park theve hicle safely as soon as pos‐
sible. Contact a qualified specialist workshop. Instrument display (standard) 1
Speedome ter
2 Multifunction display
3 Rev counter
4 Coolant temp erature display
5 Fuel le vel and fuel filler flap location indica‐
tor Instrument display in
the widescreen cockpit 1
Speedome ter
2 Multifunction display
3 Rev counter
4 Coolant temp erature display
5 Fuel le vel and fuel filler flap location indica‐
tor
The segments in speedome ter1 indica tethe
sy stem status forth efo llowing:
R Cruise control (→ page190)
R Limi ter (→ page 190)
R Distance Pilot DISTRONIC (→ page 193) 244
Instrument Display and on-board computer
Page 248 of 557

Ve
hicles with Traf fic Sign Assist and wide‐
screen cockpit: detected instructions and traf‐
fi c signs appear in the speedome ter
( → page 229).
* NO
TEEngine dama gedue toexc essively
high engine speeds The engine will be damaged if
you drive with
th e engine in theov errevving range. #
Do not drive wi th the engine in theove r‐
re vving range. The fuel supply is inter
rupted toprotect the
engine when there d band in rev counter 3
(o ve rrev ving range) is reached.
During no rmal operating conditions, coolant
te mp erature display 4may rise to120 °C. &
WARNING Danger of bu rns when open‐
ing the bonn et
If yo u open the engine bonn etwhen the
engine has overheated or during a fire inthe
engine compartment, you could come into contact with hot
gases or other escaping
operating fluids. #
Before opening the bonn et, allow the
engine tocool down. #
Intheeve nt of a fire inthe engine com‐
partment, keep the engine bonn et
closed and call thefire service. Plug-in
hybrid: make sure that youre ad the
separate Owner's Manual. Otherwise, you may
fa ilto recognise dangers. Overview of the buttons on the
steering
wheel 1
Button group:
% Main menu and ba ckbutton (on-board
computer)
8 Switches sound off/on
W Increases thevo lume
X Decreases thevo lume
2 Touch Control (on-board co mputer)
3 Touch Control (multimedia sy stem)
4 Button group:
% Main menu and back button (multime‐
dia sy stem) Instrument Display and on-board computer
245
Page 249 of 557

ó
LINGU ATRO NIC or Voice Cont rol Sys‐
tem
6 Makes/accepts a call
~ Rejects/ends a call Ope
rating the on-board co mputer &
WARNING Risk of di stra ction from infor‐
mation sy stems and communications
equipment
If yo u operate information and communica‐
tions equipment integ rated in theve hicle
when driving, you will be distracted from the
traf fic situation. This could also cause youto
lose control of theve hicle. #
Only operate this equipment when the
traf fic situation permits. #
Ifyo u cannot be sure of this, stop the
ve hicle whilst paying attention toroad
and traf fic conditions and ope rate the
equipment with theve hicle stationar y. Yo
u must obse rveth e legal requirements forthe
country in whi chyou are cur rently driving when
operating the on-board computer.
% The on-board computer displa ysappear in
th e multifunction display (→ page247). The on-boa
rdcompu ter is operated using Touch
Control 2and back but ton1 onthe left-hand
side of thesteering wheel.
The following menus are available:
R Service
R Assistance
R Trip
R Navigation R
Radio
R Media
R Telephone
R Vehicles with an instrument display in
th e widescreen cockpit: Content
R HUD
R Vehicles with an instrument display in
th e widescreen cockpit: Design
The menus can be called up from the menu bar
in the multifunction displa y. #
Tocall up the menu bar: pressthe back
button on the left. 246
Instrument Display and on-board computer
Page 250 of 557

#
Toscroll in the menu bar: swipetothe left
or right on the left-hand Touch Control. #
Tocall up the menu or confirm the selec‐
tion: press the left-hand Touch Control. #
Toscroll through displa ysor lists in the
menu: swipe upwards or down wards on the
left-hand Touch Control. #
Tocall up the submenu or confirm the
selection: pressthe left-hand Touch Control. #
Toexitth e submenu: pressthe back button
on the left.
If yo u are br owsing a submenu and you press
and hold the back button on the left, the menu
bar appears. Displa
ysinthe multifunction display 1
Outside temp erature
2 Drive prog ram
3 Transmission position (→ page162)
4 Time
5 Display section
% Ve
hicles with the instrument display in
th e widescreen cockpit: the position of the
displa ysdeviates from those displa yed here.
Fu rther displa ysinthe multifunction display:
Z Gearshift
recommendation (→ page 165)
ë Parking Pilot activated é
Parking Assist PARKTRONIC deacti vated
¯ Cruise cont
rol (→ page 190)
È Limi
ter (→ page 190)
ç Distance Pilot DISTRONIC (→ page 200)
(→ page 193)
a St
eering Pilot (→ page 200)
è ECO
start/ stop function
ë HOLD function (→
page 203)
_ Ad
aptive Highbeam Assist Plus
(→ page 128)
ð Maximum permissible speed
exceeded
(for cer tain countries only) Instrument Display and on-board computer
247
Page 251 of 557

Ad
justing the in stru ment lighting #
Turn brightness control 1up or down.
The lighting of the instrument display and in
th e controls in theve hicle interior is adjus‐
te d. Menus and submenus
Fu
nctions in the Service menu of the on-
board compu ter On-board computer:
, Service #
Toselect the function: swipe upwards or
down wards on the left-hand side of Touch
Control. #
Press the left-hand Touch Control.
Fu nctions in theService menu:
R Message memory (→ page 437)
R AdBlue: Adblue ®
ra nge
R Tyre pressure :
- Restarting the tyre pressure loss warning
sy stem (→ page 409)
- Checking the tyre pressure with the tyre
pressure monitoring sy stem
(→ page 405)
- Restarting the tyre pressure monitoring
sy stem (→ page 405) R
ASSYST PLUS: call up the service due date
(→ page 363)
R Engine oil le vel Calling up
the Assistance graphic display On-board computer:
, Assistance
% Ve
hicles with the instrument display in
th e widescreen cockpit: whenyou ha ve
th e design set toProgressive ,yo u can view
th e assis tance graphic in the left-hand por‐
tion of the instrument displa y.
The following displa ysare available from the
Assi stance graphic menu:
R Assis tance graphic
R Attention le vel (→ page 228) #
Toswitch between the displa ys:swipe
up wa rds or down wards on the left-hand side
of Touch Control. 248
Instrument Display and on-board computer
Page 252 of 557

St
atus displa ysinthe Assis tance graphic:
R é: ATTENTION ASSIST deactivated
R æ: Active Brake Assi stdeactivated
R Light lane markings: Active Lane Keeping
Assist activated
R Green lane markings: Active Lane Keeping
Assist actived R
Grey radar waves next tovehicle: Blind Spot
Assist activated
R Green radar waves next tovehicle: Blind Spot
Assist actived
R Display of Dis tance Pilot DISTRONIC
(→ page 193) Calling up displa
ysintheTr ip menu On-board computer:
, Trip
% Ve
hicles with the instrument display in
th e widescreen cockpit: whenyou ha veset
th e progressive display setting, you can view
information on the journey in theContent
menu. #
Toselect a displa y:swipe upwards or down‐
wa rds on the left-hand Touch Control.
Displa ysintheTrip menu:
R Standard display
R Range and cur rent fuel consu mption
A recuperation displ ayis also available for
cer tain engines. If there is only a small amount of fuel left in
the fuel tank, the dis‐
play sho wsave hicle being refuelled ins tead
of thera nge.
R ECO displ ay (→page 159)
R Trip computer From startandFrom reset
R Digital speedom eter
% Ve
hicles with an instrument display in
th e widescreen cockpit: the digital speed‐
ome ter only appears in the Classic or Sport
display setting. Example:
standard display
1 Trip dis tance
2 Total dis tance recorder Instrument Display and on-board compu
ter249
Page 253 of 557

Example: trip computer
1 Total dis tance recorder
2 Driving time
3 Average speed
4 Average fuel consum ption Re
setting values in theTr ip menu of the on-
board compu terOn-board computer:
, Trip
% The spelling may dif fer in the main menu dis‐
pla yed. Therefore, obser vethe menu over‐ view
forth e instrument display
(→ page 246).
Yo u can reset theva lues of thefo llowing func‐
tions:
R Trip dis tance
R Trip computer "F rom start" and "F rom reset"
R ECO display #
Toselect the function tobe rese t:swipe
upwards or down wards on the left-hand
To uch Control. #
Press the left-hand Touch Control. #
Select Yes. #
Press the left-hand Touch Control.
If yo u press and hold the left-hand side of Touch
Control, the function will be reset immediately. Calling up navigation instructions in
the on-
board compu ter On-board computer:
, Navigation Example: no
change of direction announced
1 Distance tothe next destination
2 Estimated ar riva l time
3 Distance tothe next change of direction
4 Current road 250
Instru ment Display and on-board computer