
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 spr ay.
R Ifth ere is glare, e.g. from oncoming traf fic,
di re ct sunlight or reflections from other vehi‐
cles. 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 tra ffic signs are hard todetect, e.g. due
to dirt or sno w,or because they are co vered
or because of insuf 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.
Setting Traf fic Sign Assist
Multimedia sy stem:
, Vehicle .
k Assistance .
Traffic
Sign Assist
Speed Limit Pilot for Di stance Pil ot
DISTRONIC
Speed limi tation is set au tomatically if
DISTRONIC is activated. #
Select Speed Limit Pilot. #
Activate or deacti vate the function. %
Ifth e Speed Limit Pilot has been activated,
th e de tected traf fic signs are au tomatical ly
displa yed in the instrument clus ter.
Displa ysinthe instrument clus ter
De tected traf fic signs are displ ayed in the instru‐
ment clus ter. #
Select Display in inst. cluster. #
Activate or deacti vate the function.
Ac tivating or deactivating the warning when
a speed limit is exceeded
The point at which a warning is given once a
speed is exceeded (warning thre shold) can be
set according toindividual preferences. #
Select Speed limit warning. #
Select Visual & audible ,Visual orNone.
Setting a speed #
Select Warning threshold. #
Set the desired speed. Driving and parking
231

Blind Spot Assi
stand Active Blind Spot
Assi st Fu
nction of Blind Spot Assist and Active
Blind Spot Assi st
Blind Spot Assi stuses two lateral, rear-facing
ra dar sensors tomonitor the area up to40 m
behind your vehicle and 3 m directly next to your
ve hicle.
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.
If a vehicle is de tected close to yourvehicle in
th e lateral monitoring range and you swit chon
th e turn signal indicator in the cor responding
direction, a warning tone sounds once. The red
wa rning lamp in the outside mir rorflashes. If the
turn signal indica torre mains on, all other de tec‐
te dve hicles are indicated only bytheflashing of
th ere dwa rning lamp.
If yo uove rtake a vehicle quickl y,no warning is
given. &
WARNING Risk of accident despi teBlind
Spot Assi st
Blind Spot Assi stdoes not react tovehicles
approaching and overtaking you at a greatly
di fferent speed.
As a result, Blind Spot Assist cannot warn
drivers in this situation. #
Alw ays pay careful attention tothe traf‐
fi c situation and maintain a safe dis‐
ta nce at the side of theve hicle. Blind Spot Assist and
Active Blind Spot Assi st
are on lyaids. They may failto detect some vehi‐
cles and are no substitute for attentive driving.
Alw ays ensure that there is suf ficient di stance to
th e side forot her road users and obs tacles.
Sy stem limitations
The de tection capability of Blind Spot Assi stcan
be restricted in thefo llowing situations:
R Ifth e sensors are dirty or co vered.
R When there is poor visibility, e.g. due tofog,
heavy rain, snow or spr ay. R
If nar rowvehicles are within the monitoring
ra nge, e.g. bicycles.
Wa rnings may be issued in er ror when driving
close tocrash ba rriers or similar solid lane bor‐
ders. Warnings may be inter rupte d when driving
alongside long vehicles, forex ample lor ries, for a
prolonged time.
Blind Spot Assist is not operational when reve rse
ge ar is engaged.
Brake application of Active Blind Spot Assi st
If Ac tive Blind Spot Assi stdetects a risk of a side
impact in the monitoring range, a cou rse-cor‐
re cting brake application is car ried out. This is
designed tohelp youavo id a collision.
The course-cor recting brake application is availa‐
ble in the speed range between appr oximately
30 km/h and 200 km/h. &
WARNING Risk of accident despi te
brake application of Active Blind Spot
Assi st
A cou rse-co rrecting brake application cann ot
alw ays pr event a collision. 232
Driving and parking

#
Alw aysst eer, brake or accelera teyour‐
self, especially if Active Blind Spot
Assi stwa rnsyo u or makes a course-
co rrecting brake application. #
Alw ays maintain a safe dis tance at the
sides. &
WARNING Risk of accident despi te
Ac tive Blind Spot Assi st
Blind Spot Assi stdoes not react tothefo l‐
lowing:
R Over taking vehicles closely on the side,
placing them in the blind spot area
R Vehicles approaching and overtaking you
at a very differe nt speed
As a result, Active Blind Spot Assi stmay nei‐
th er give warnings nor inter vene in su chsit‐
uations. #
Alw ays pay careful attention tothe traf‐
fi c situation and maintain a safe dis‐
ta nce at the side of theve hicle. If a course-cor
recting brake application occu rs,
th ere dwa rning lamp flashes in the outside mir‐
ro r and an acou stic wa rning signal sounds. In
addition, a display 1indicating the danger of a
side collision appears in the multifunction dis‐
pla y.
In rare cases, the sy stem may make an inappro‐
priate brake application. This brake application
may be inter rupte d at any time if yousteer
slightly in the opposite direction or accelera te.Sy
stem limitations
Either a course-cor recting brake application
appropria teto the driving situation, or none at
all, may occur in thefo llowing situations:
R There are vehicles or obs tacles, e.g. crash
ba rriers, on bo thsides of your vehicle.
R Ave hicle approaches too closely on the side.
R You ha veadop ted a sporty driving style with
high cornering speeds.
R You clear lybrake or accelerate.
R A driving sa fety sy stem inter venes, su chas
ESP ®
or Active Brake Assi st.
R ESP ®
is deacti vated.
R A loss of tyre pressure or a defective tyre is
de tected.
R When driving wi tha trailer, the electrical con‐
nection tothe trailer hitch has been cor rectly
es tablished. Driving and parking
233

R
The lane markings are worn, dark or co vered.
R The dis tance totheve hicle in front is too
small and the lane markings thus cannot be
de tected.
R The lane markings change quickl y,e.g. lanes
branch off, cross one ano ther or mer ge.
R The road is very nar row and winding.
Ve hicles with Driving Assistance pac kage or
Driving Assistance Plus pa ckage: Active Lane
Ke eping Assist uses radar sensors tomonitor
se veral areas around theve hicle. If thera dar
sensors in there ar bumper are dirty or co vered
with sn ow,th e sy stem may be impaired or may
not function. If an obs tacle in the lane in which
yo u are driving has been de tected, no lane-cor‐
re cting brake application occu rs.
Ac tivating Active Lane Keeping Assist &
WARNING Risk of accident despi te
Ac tive Lane Keeping Assist warning
A lane-cor recting brake application cannot
al wa ys bring theve hicle back into the origi‐
nal lane. #
Alw aysst eer, brake or accelera teyour‐
self, especially if Active Lane Keeping
Assist warnsyo u or makes a lane-cor‐
re cting brake application. &
WARNING Risk of accident despi teinter‐
ve ntion of Active Lane Keeping Assist
Ac tive Lane Keeping Assist does not de tect
traf fic conditions or road users. In very rare
cases, the sy stem may make an inappropri‐
ate brake application, e.g. af ter intentional ly
driving over a solid lane marking.
The brake application can be inter rupte d at
any time if yousteer slightly in the opposite
direction. #
Alw ays make sure that there is suf fi‐
cient di stance tothe side forot her traf‐
fi c or obs tacles. &
WARNING Risk of accident despi teLane
Ke eping Assist
Lane Keeping Assist cann otalw ays clearly
de tect lane markings. In su
chcases, Lane Keeping Assist can:
R give an unnecessary warning
R not give a warning #
Alw ays pay particular attention tothe
traf fic situation and keep within the
lane, especially if Active Lane Keeping
Assist alerts you. Re
quirement:
The driving speed is at least 60 km/h. 236
Driving and parking

#
Press button 2.
If indicator lamp 1lights up, Lane Keeping
Assist is activated. When lane markings are
de tected, the lines in the assis tance graphic
are shown in white.
Sensitivity of Active Lane Keeping Assist
Wi th th est andard or adaptive setting, you can
influence when thewa rning vibration of Lane
Ke eping Assist take s place. In bo
th thest andard and adaptive settings, no
wa rning vibration occurs in thefo llowing situa‐
tions:
R You ha veswitched on the turn signal indica‐
to r.
R A driving sa fety sy stem inter venes, su chas
ABS, BAS or ESP ®
.
In the adaptive setting, there will also be no
wa rning vibration in thefo llowing situations:
R The vehicle is accelerated or braked consid‐
erably.
R Yousteer actively, e.g. swer vetoavo id an
obs tacle or change lane quickl y.
R You cut the corner on a sharp bend.
Setting the sensitivity of Active Lane Keep‐
ing Assist
Multimedia sy stem:
, Vehicle .
k Assistance .
Act.
Lane Keep. Assist
Selection options #
Select Adaptive orStandard. Tr
ailer hitch Note
s on trailer operation Obser
vethefo llowing no tes on theto ngue
we ight:
R use a tongue weight as close as possible to
th e maximum tongue weight
R do not use a tongue weight that exc eeds or
fa lls below the permissible tongue weight
Do not exceed thefo llowing values:
R permissible towing capacity
R the permissible rear axle load of theto wing
ve hicle
R the permissible gross mass of theto wing
ve hicle
R the permissible gross mass of the trailer
R the maximum permissible speed of the trailer
Make sure of thefo llowing before starting a jour‐
ney:
R the tyre pressure on there ar axle of theto w‐
ing vehicle is set for a maximum load
R the headlamps are adjus ted cor rectly Driving and pa
rking 237

#
Pull switch 2again.
Indicator lamp 1flashes and theTrailer
coupling extending… display message
appears in the multifunction displa y.
The ball neck retracts fully electrically.
Wa it until the ball neck has loc ked in place.
The ball neck is securely loc ked into place once
indicator lamp 1goes out. If
th e ball neck is not securely loc ked in place,
th eCheck trailer hitch lock display message
appears in the multifunction displa y.
Obser veany information which may be displa yed
in the instrument clus ter:
R warning and indicator lamps (→ page 493)
R display messages (→ page 437) Coupling up/uncoupling a trailer
&
WARNING Risk of inju ryfrom theve hicle
le ve l being changed
Ve hicles with le vel control sy stem: theve hi‐
cle le vel may be changed unin tentionally, e.g.
by ot her persons. If this happens when you
are coupling up or uncoupling a trailer, you
could become trapped. In addition, other
people could become trapped if their limbs
are between theve hicle body and the tyres
or underneath theve hicle.
When coupling up or uncoupling a trailer,
make sure that: #
The doors or tailgate are not opened or
closed. #
Do not initiate the le vel control sy stem
and do not operate theDY NA MIC
SELECT switch. #
The vehicle is not loc ked or unloc ked. Re
quirements:
Before coupling up the trailer, the ball neck must
ex tend ful lyelectrically, securely engage and
lock into place.
Tr ailers with a 7-pin plug can be connec tedto
th eve hicle:
R adap ter plug
R adapte r cable
In order forth e trailer tobe recognised bythe
ve hicle:
R the electrical connection must be set up cor‐
re ctly
R the trailer lighting sy stem must be in working
order Driving and parking
239

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

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