Page 241 of 557

Extending/r
etra cting the ball neck fully elec‐
trically &
WARNING Risk of accident due tothe
ball neck not being engaged
If th e ball neck is not engaged, the trailer
may come loose. #
Make sure that the ball neck securely
engages and loc ksinto place. *
NO
TEDama getothe full y-electric trailer
hitch The fully-elect
ric trailer hitch could be
mechanically damaged byapplying additional
pressure when the ball neck is being exten‐
ded or retracted. #
Do not ma kethe ball neck extend/
re tract faster by applying additional
pressure. Re
quirements:
Make sure of thefo llowing before retracting the
ball neck fully elect rically:
R trailer cables or adap ter plugs ha vebeen
re mo ved
R thera nge of mo vement is clear
Extending/r etra cting the ball neck fully elec‐
trically #
Pull swit ch2.
Indicator lamp 1flashes and theTrailer
coupling extending… display message
appears in the multifunction displa y.
The ball neck extends 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, theCheck trailer hitch lock display
message appears in the multifunction dis‐
pla y. 238
Driving and parking
Page 242 of 557

#
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
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 244 of 557

#
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
Page 245 of 557

R
when transporting four bic ycles, alw ays
use bic ycle rack s which ha veadditional
suppo rton the ball neck guide pin.
R only use bicycle rack s appr ovedby
Mercedes-Benz.
R always obser vethe bicycle rack operating
instructions. *
NO
TEDama getoor crac kson the trailer
hitch due tounsuitable bic ycle rack s or
bicycle rack s being used incor rectly #
Only use bicycle rack s appr ovedby
Mercedes-Benz. Tr
ailer hit ch(examp le with additional guide pins)
Depending on the design, up tofour bic ycles can
be transpor ted on the bicycle rack:
R when moun tedby attaching toball head 1,
th e maximum load capacity is 75kg.Up to
th re e bicycles can be transpor ted. R
when mounted on ball head 1and guide pin
2, the maximum load capacity is 100kg.
Up tofour bic ycles can be transpo rted.
The load capacity is calculated from thewe ight
of the bicycle rack and the bicycle rack load.
Fo r bicycles weighing a total of between 75kg
and 100kg only use bicycle rack s with addi‐
tional support on guide pin 2.
The vehicle's handling characteristics change
when a bicycle rack isfitted. The vehicle:
R is heavier
R isrestricted in its accele ration and gradeabil‐
ity
R has an increased braking di stance
This can impair theve hicle's handling character‐
istics. Adapt your driving style accordingly. Drive
carefully and maintain a safe dis tance.
When using a bicycle rack , set the tyre pressure
fo r maximum load on there ar axle of theve hicle.
Fu rther information on the tyre pressure can be
fo und in the tyre pressure table (→ page 403). 242
Driving and pa rking
Page 246 of 557

Note
s on loads
The larger the dis tance between the load's
cent reof gr avity and the ball head, the greater
th e load on the trailer hitch.
Obser vethefo llowing no tes:
R mount heavy bicycles as close totheve hicle
as possible.
R always distribute the load on the bicycle rack
as eve nly as possible across theve hicle's
longitudinal axis.
Mercedes-Benz recommends removing all
de tach able parts from the bicycles, e.g. bask ets,
ch ild seats or batteries, before loading them
onto the bicycle rack . This impr ovesth e wind
re sis tance and centre of gr avity of the bicycle
ra ck.
Alw ays secure the bicycles toprev ent them from
moving around and check they are secured at
re gular inter vals.
Do not use tarp aulins or other co vers. The han‐
dling characteristics and rear view may be impaired. In addition,
the wind resis tance and
load on the trailer hitch increase. Distribution of
the load on the bicycle rack
1 Vertical dis tance between the cent reof gr av‐
ity and ball head
2 Horizon tal dis tance between centre of gr av‐
ity and ball head
3 Cent reof gr avity located on theve hicle's
centre axis Obser
vethefo llowing information when
loading the bicycle rack: Nu
mber
of bicy‐
cles To
tal
we ight
of bicy‐
cle rack
and load Max. dis‐
tance
1 1Max. dis‐
tance
2 2
3U pto
75 kg 420 mm 300 mm
4 1
Upto
90 kg1 420 mm 400 mm
4 1
Upto
10 0kg 1 420 mm 400 mm 1
When transpo rting four bicycles or with a totalwe ight between 75kgand 100kg , alw ays use bicycle rack s with additional support on the trailer hitch guide pin. Driving and parking
243
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