
by
how much the maximum permissible speed
can be exceeded before a warning is issued. Yo u
can specify whe ther thewa rning is tobe just a
visual warning or an acoustic one as well.
Display in the instrument display In
stru ment display in theWi descreen Cockpit
1 Perm issible speed
2 Perm issible speed when there is a restriction
3 Additional sign with restriction Tr
af fic Sign Assi stis not available in all coun‐
tries. If it is una vailable, display 1is shown in
th e speedome ter.
Wa rning when app roaching pedestrian cross‐
ings (vehicles with Driving AssistancePack‐
age)
The sy stem can warnyou if you approach a
pedestrian crossing with your vehicle. A mes‐
sage appears inthe instrument clus ter. The
warning occurs if appropriate traf fic signs or
ro ad markings are recognised and pedestrians
are present in the danger zone.
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing situations:
R Ifth ere is poor visibility, e.g. due toinsuf fi‐
cient illumination of thero ad, if there are
highly variable shade conditions or in rain,
sno w,fog or heavy spr ay.
R Ifth ere is glare, e.g. from oncoming traf fic,
di re ct sunlight or reflections. Driving and parking
241 

R
Ifth e windscreen in the area of the multi‐
function camera is dirty, or if the camera is
mis ted up, damaged or co vered.
R Ifth e traf fic signs are ha rdtodetect, e.g. due
to dirt or sno w,or because they are co vered
or due toinsuf ficient lighting.
R Ifth e information in the navigation sy stem's
digital map is incor rect or out-of-da te.
R Ifth e signs are ambiguous, e.g. tra ffic signs
on con stru ction sites or in adjacent lanes.
R Ifyo u turn sharply when traf fic signs are out‐
side the camera's field of vision.
Setting Traf fic Sign Assist
Re quirements:
R For automatic ado ption of speed limits:
Ac tive Dis tance Assi stDISTRONIC is acti va‐
te d. Multimedia sy
stem:
4 © 5
Settings 5
Assistance
5 Traffic Sign Assist
Ac tivating/deactivating automatic adoption
of speed limits #
Select Adopt limit . #
Activate or deacti vate the function.
The speed limits de tected byTraf fic Sign
Assi stare automatically adop tedby Active
Dis tance Assi stDISTRONIC.
% If one of thefo llowing sy stems is activated,
th e speed de tected can be manually adop ted
as the speed limit:
R Active Dis tance Assi stDISTRONIC
R Cruise control
R Variable limiter:
Fu rther information (/ page 207).
Displaying de tected traf fic signs in the
medi a display #
Select Display in head unit. #
Activate or deacti vate the function. Ad
justing the type of warning #
Select Visual & audible ,Visual orNone.
Ad justing the warning threshold
This value de term ines the speed at which a
wa rning is issued when exceeded. #
Select Warning threshold. #
Set the desired speed. Blind Spot Assist and
Active Blind Spot
Assi stwith exitwa rning Fu
nction of Blind Spot Assist and Active
Blind Spot Assi stwith exitwa rning
Blind Spot Assist and Active Blind Spot Assi st
use two lateral, rear-facing radar sensors to
monitor the area up to40 m behind your vehicle
and 3 m directly next to yourvehicle.
If a vehicle is de tected at speeds ab ove appr ox‐
imately 12km/h and this vehicle subsequently
enters the monitoring range di rectly next to your
ve hicle, thewa rning lamp in the outside mir ror
lights up red. 242
Driving and pa rking 

Fo
lding the ball neck out #
Pull release switch 2until the ball neck
unloc ks.
The ball neck will fold out from under the
re ar bumper.
Indicator lamp 1will flash. #
Pull the ball neck in the direction of the
ar row until it en gage s audibly in a vertical
position.
Indicator lamp 1onthe ball neck release
switch will go out.
If th e ball neck is not securely loc ked in
place, theTrailer coupling Check lock display
message will appear on the multifunction dis‐
pla y. #
Remo vethe co ver from the ball head and
st ore it in a safe place.
Make sure that the ball on the ball neck is clean.
Check that it is either greased or dr y (grease-
free), depending on the instructions forthe
traile r.
Fo lding the ball neck in #
Pull release switch 2until the ball neck
unloc ks.
The ball neck will fold up under there ar
bumper.
Indicator lamp 1will flash. #
Push the ball neck in the direction of the
ar row until it en gage s audibly behind the
bumper.
Indicator lamp 1will go out and the mes‐
sage on the multifunction display will disap‐
pear.
Obser vethe information on the displa yson the
instrument clus ter:
R Warning and indicator lamps
(/ page 560)
R Display messages (/ page 509) Driving and parking
249 

Coupling up / uncoupling a trailer
Re
quirements:
R the ball neck must be extended and engaged
in the securely loc ked position
Tr ailers with a 7-pin plug can be connec tedto
th eve hicle with thefo llowing adap ters:
R adap ter plug
R adapte r cable
The trailer will be cor rectly de tected bytheve hi‐
cle only if thefo llowing conditions are me t:
R the trailer is connected cor rectly
R the trailer lighting sy stem is in working order
The functions of thefo llowing sy stems are af fec‐
te dby a cor rectly connected traile r:
R Active Lane Keeping Assist
R ESP ®
trailer stabilisation
R Parking Assist PARKTRONIC
R Active Parking Assist
R Blind Spot Assist or Active Blind Spot Assi stCoupling up a trailer
* NO
TEDama getotheve hicle battery due
to full dischar ge Charging
the trailer battery using the po wer
supply of the trailer can damage theve hicle
batter y. #
Do not use theve hicle's po wer supply
to charge the trailer batter y. #
Remo vethe co ver from the ball head and
st ore it in a safe place (/ page109). #
Position the trailer on a le vel sur face behind
th eve hicle and couple it up totheve hicle. #
Open the soc ket cap. #
Inse rtthe plug with lug 1in groo ve3 on
th e soc ket. #
Turn the ba yonet coupling 2clockwise as
fa r as it will go. #
Let the cap engage. #
Secure the cable tothe trailer with cable ties
(only if you are using an adap ter cable). #
Make sure that the cable is alw ays slack for
ease of mo vement during cornering.
A display messa gemay appear on the multifunc‐
tion display even if the trailer has been connec‐
te d cor rectly:
R LEDs ha vebeen ins talled in 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 lyup to180W, and tothe
po we r supp lythat is swit ched on via the igni‐
tion loc k. 250
Driving and parking 

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 (e xamp le)
2 Multifunction display
3 Fuel le vel and fuel filler flap location indica‐
tor
Fu rther content can also be shown on the multi‐
function display 2:
R Assis tant displ ay
R Telephone
R Navigation
R Trip
R Radio R
Media
R Vehicle dynamics
R Styles
R Service
Instrument display in the widescreen cockpit 1
Speedome ter (e xamp le)
2 Multifunction display
3 Rev counter (e xample)
4 Coolant temp erature display
5 Fuel le vel and fuel filler flap location indica‐
tor 254
Instrument Display and on-board computer 

%
In addition tothe multifunction display 2,
fur ther conte nt can be shown on displ ays1
and 3(/ page 258).
The segments on speedome ter1 indica tethe
sy stem status forth efo llowing:
R Cruise control (/ page 201)
R Limiter (/ page 202)
R Active Dis tance Assi stDISTRONIC
(/ page 205)
* NO
TEEngine damage due 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 will be inter
rupted toprotect the
engine when there d mark on there v counter
(o ve rrev ving range) is reached.
Ve hicles with widescreen cock pit:during nor‐
mal operating conditions, the coolant temp era‐
ture display may 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. Overview of
the but tons on thest eering
wheel 1
¤ Back/Home button (press and hold),
on-board computer
2 Touch Control, on-board co mputer
3 Control panel for cruise control/limiter or
Ac tive Dis tance Assi stDISTRONIC
4 Control panel for MBUX multimedia sy stem:
£ LINGU ATRO NIC
ß Displa ysfavo urites
VO L: control knob, adjusts thevo lume or
switches the sound off 8(press)
6 Makes/accepts a call Instrument Display and on-board computer
255 

~
Rejects/ends a call
5 ò Calls up the home screen
6 Touch Control multimedia sy stem
7 % Back button (press and hold) Operating
the on-boa rdcompu ter &
WARNING Risk of di stra ction from infor‐
mation sy stems and communications
equipment
If yo u operate information and communica‐
tion 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. Obser
vethe legal requ irements forth e count ry
in which you are cur rently driving when you
operate the on-board computer.
% The on-board computer displa ysappear on
th e multifunction display (/ page 259). The on-board computer can be operated using
th e left-hand Touch Control 2and the left-hand
back/home button 1. When
the on-board computer is being operated,
dif fere nt acoustic signals sound as operating
fe edbac k,e.g. when the end of a list is reached
or when you are sc rolling thro ugh a list.
The following menus are available:
R Assistance
R Telephone
R Navigation
R Trip
R Radio
R Media
R Styles & display
R Service
The menus can be called up from the menu bar
on the multifunction displa y. #
Tocall up the menu bar: pressthe back
button on the left 1until the menu bar is
displa yed.
% Ve
hicles without Active Di stance Assist
DISTRO NIC:press theò button tocall
up the menu bar of the on-board computer. 256
Instrument Display and on-board computer 

#
Toscroll in the menu bar: swipe left or
ri ght on the left-hand Touch Control 2. #
Tocall up a menu or confirm a selection:
press the left-hand Touch Control 2. #
Toscroll through displa ysor lists on the
menu: swipe upwards or down wards on the
left-hand Touch Control 2. #
Tocall up a submenu or confirm a selec‐
tion: press the left-hand Touch Control 2. #
Toexit a submenu: pressthe back button
on the left 1. Selecting
the head-up display #
Ifth e head-up display is switched on: swipe
upwards on the left-hand Touch Control 2. #
Swipe upwards on the left-hand Touch Con‐
trol 2toswitch tothe head-up displa y. #
Ifth e head-up display is switched off: press
th e left-hand Touch Control 2.
Fu ll-sur face menu display
Ve hicles with an instrument display in the
widescreen cockpit: thefo llowing menus can
be shown in full on the instrument display:
R Assistance
R Trip
R Navigation #
Inthe cor responding menu, use the left-hand
To uch Control 2toscroll tothe end of the
list. #
Press the left-hand Touch Control 2.
The selected menu will be displ ayed in full. Ad
justing the design of the in stru ment dis‐
play
On-boa rdcompu ter:
4 Styles & display
Setting the design #
Swipe up wards or down wards on the left-
hand Touch Control. #
Press the left-hand Touch Control.
The instrument displ ayis shown in the selec‐
te d design.
The following designs can be selec ted, depend‐
ing on theve hicle equipment:
R Classic
R Sport
R Progressive
R Understated
R Standard displays Instrument Display and on-board computer
257