
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

#
Do not uncouple traile rswith an
engaged overrun brake. &
WARNING Risk of becoming trapped
when disconnecting the trailer cable
Ve hicles with le vel control sy stem: the
ve hicle lo werswhen the trailer cable is dis‐
connected.
This could result in you or other people
becoming trapped if your or their limbs are
between theve hicle body and the tyres or
underneath theve hicle. #
Make sure nobody is underneath the
ve hicle or in the immediate vicinity of
th e wheel ar ches when you disconnect
th e trailer cable. *
NO
TEDama getothere ar bumper from
ins talling adap ter cables or adapte r plugs The
following parts could be damaged when
re tracting the ball neck fully electrically:
R bumper
R adap ter cable
R adapte r plug #
Alw aysre mo vethe adap ter cable or
adapte r plug before retracting the ball
neck fully electrically. #
Safeguard the trailer against rolling away. #
Disconnect the electrical connection
between theve hicle and the trailer. #
Uncouple the trailer. #
Place the pr otective co vering on the ball
head. Bicycle
rack &
WARNING Risk of an accident when
using the bicycle rack incor rectly
The bicycle rack may become de tach ed from
th eve hicle in thefo llowing cases:
R the permissible load capacity of the
trailer hitch is exceeded.
R the bicycle rack is used incor rectl y.
R the bicycle rack is secured tothe ball
neck beneath the ball head.
Obser vethefo llowing foryo ur ow n sa fety
and that of other road users:
R always adhere tothe permissible load
capacity of the trailer hitch.
R only use the bicycle rack totranspo rt
bicycles.
R always mount the bicycle rack properly by
attaching tothe ball head and the ball
neck guide pin, if possible. Driving and parking
241

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

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

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

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

%
This is how tochange thech annel on the
media source TV.
Changing the media source #
Press the left-hand Touch Control. #
Toselect a media source: swipe upwards
or down wards on the left-hand side of Touch
Control. #
Press the left-hand Touch Control. Dialling
telephone numbers using the on-
board compu ter Re
quirements:
R Mobile phone connec tedto the multimedia
sy stem On-board computer:
, Telephone &
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. When
telephoning, you must obse rveth e legal
re qu irements forth e count ryin which you are
cur rently driving.
Ve hicles with the COMAND Online multime‐
dia sy stem: the most recent telephone connec‐ tions (dialled,
recei ved and missed calls) are dis‐
pla yed in theTelephone menu. #
Toselect thete lephone number: swipe
upwards or down wards on the left-hand
To uch Control. #
Press the left-hand Touch Control.
If th ere is only one telephone number
sa ve dto an entr y:thete lephone number is
selec ted. #
Ifth ere are multiple telephone numbers
sa ve dto an entr y:swipe upwards or down‐
wa rds on the left-hand Touch Control to
select the desired telephone number. #
Press the left-hand Touch Control.
The telephone number is dialled.
The following displa ysmay appear ins tead of the
te lephone numbers dialled:
R Please wait... :th e application is starting.
When a Blue tooth®
connection tothe mobile
phone is not es tablished, the menu for
authorising and connecting a mobile phone is
displa yed in the multimedia sy stem
(→ page 308). Instrument Display and on-board computer
253

Operating saf
ety &
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. &
WARNING Risk of di stra ction from oper‐
ating mobile communication equipment
while theve hicle is in motion
If yo u operate mobile communication equip‐
ment when driving, you will be distracted from
the tra ffic situation. This could also
cause youto lose control of theve hicle.
Only operate this equipment when theve hi‐
cle is stationar y. Fo
ryo ur ow n sa fety, al ways obser vethefo llow‐
ing points when operating mobile communica‐
tions equipment and especially your voice con‐
trol sy stem:
R Obser vethe legal requ irements forth e coun‐
try in which you are driving.
R While driving, on ly operate mobile communi‐
cations equipment and your voice control
sy stem when the tra ffic conditions permit it.
Yo u may otherwise be distracted from the
traf fic conditions and cause an accident,
inju ring yourself and others.
R Do not use thevo ice control sy stem in an
emer gency as your voice can change and
yo ur telephone call can be unnecessarily
dela yed.
R Familiarise yourself with thevo ice control
sy stem functions before starting the journe y. Operation
Operating
the multifunction steering wheel LINGU
ATRO NIC is operational appr oximately
th irty seconds af terth e ignition is switched on. 1
8 Switches the sound off/on (ends LIN‐
GU ATRO NIC)
2 ó Starts LINGU ATRO NIC
3 6 Makes/accepts a call
4 ~ Rejects/ends a call (ends LINGUA‐
TRONIC)
5 W Increases thevo lume
6 X Decreases thevo lume LINGU
ATRO NIC 257