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by
vibration pulses in thesteering wheel and gui‐
ded bya course-cor recting brake application
ba ck into your lane.
Yo u are warned byvibration pulses in thesteer‐
ing wheel in thefo llowing circums tances:
R Active Lane Keeping Assist de tects a lane
marking.
R A front wheel drives overth is lane marking.
Yo u will also be guided back into your lane by
means of a course-cor recting brake application
if th efo llowing conditions are me t:
R Active Lane Keeping Assist de tects lane
markings on bo thedges of the lane.
R A front wheel drives over a solid lane mark‐
ing.
Yo u can activate or deactivate theAc tive Lane
Ke eping Assist warning.
Ac tive Lane Keeping Assist can neither reduce
th erisk of an accident if youfa ilto adapt your
driving style nor override the la wsof ph ysics. It
cannot take into account road, weather or traf fic
conditions. Active Lane Keeping Assist is only an
aid. You are responsible for maintaining a safe dis
tance totheve hicle in front, forve hicle
speed, for braking in good time and forst ay ing
in lane.
Ac tive Lane Keeping Assist can bring theve hicle
back into the lane with a lane-cor recting brake
application. In the case of a broken lane marking
being de tected, a brake application will only be
made if a vehicle has been de tected in the adja‐
cent lane. Oncoming tra ffic can be de tected.
Ve hicles with Driving Assistance Package or
Driving Assistance Plus Package: overtaking
ve hicles and vehicles in adjacent lanes can also
be de tected.
Ve hicles without Driving Assistance Pack‐
age or Driving Assistance Plus Package: a
lane-cor recting brake application also takes
place when, in addition toa broken lane mark‐
ing, the edge of a firm road sur face is de tected
(e.g. central reser vation).
Ac tive Lane Keeping Assist is available in the
speed range between 60 km/h and 200 km/h. If a lane-co
rrecting brake application occurs, dis‐
play 1appears in the multifunction displa y.
Sensitivity of Active Lane Keeping Assist
% The availability of thefo llowing function is
countr y-dependent.
A lane-cor recting brake application also occu rs
in theSensitive setting in thefo llowing situa‐
tions:
R Active Lane Keeping Assist de tects a solid
lane marking.
R A front wheel drives overth is lane marking. 254
Driving and parking
Page 258 of 629

Sy
stem limits
No lane-cor recting brake application occu rsin
th efo llowing situations:
R You clear lyand actively steer, brake or accel‐
erate.
R You ha veswitched on the turn signal indica‐
to r (situation-dependent).
R A driving saf ety sy stem inter venes, su chas
ESP ®
,Ac tive Brake Assi stor Active Blind
Spot Assi st.
R You ha veadop ted a sporty driving style with
high cornering speeds or high rates of accel‐
eration.
R When ESP ®
is deactivated.
R When driving with a trailer, the electrical con‐
nection tothe trailer has been cor rectly
es tablished.
R If a loss of tyre pressure or a defective tyre
has been de tected and displ ayed. 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,
th e sun or reflections.
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 ere are no lane markings, or se veral
unclear lane markings are present for one
lane, e.g. around roadwor ks.
R Ifth e lane markings are worn, dark or cov‐
ered.
R Ifth e dis tance totheve hicle in front is too
short and thus the lane markings cann otbe
de tected.
R Ifth e lane markings change quickl y,e.g.
lanes branch off, cross one ano ther or
mer ge. R
Ifth e car riag ewa y is very nar row and wind‐
ing.
Ve hicles without Driving Assistance Pack‐
age or Driving Assistance Plus Package:
Ac tive Lane Keeping Assist uses radar sensors
to monitor se veral areas around theve hicle. If
th era dar sensors in there ar bumper are dirty or
co vered with sno w,the sy stem may be impaired
or may not function. If an obs tacle in the lane in
which you are driving has been de tected, no
lane-cor recting brake application occu rs.
Ac tivating/deactivating Active Lane Keeping
Assist
Multimedia sy stem:
4 © 5
Settings 5
Quick access
5 Active Lane Keeping Assist #
Activate or deacti vate the function. Driving and parking
255
Page 259 of 629

Setting
Active Lane Keeping Assist
Multimedia sy stem:
4 © 5
Settings 5
Assistance
5 Active Lane Keeping Assist
Setting the sensitivity
% The availability of this function is dependent
on the count ry. #
Select Standard ,Sensitive orOff.
Ac tivating/deactivating the haptic warning #
Select Warning.
Ac tivate or deacti vate the function. Tr
ailer hitch Note
s on trailer operation Obser
vethefo llowing no tes on theto ngue
we ight:
R Do not use a tongue weight that exceeds or
fa lls below the permissible tongue weight
R Use a tongue weight as close as possible to
th e maximum tongue weight Do not
exceed thefo llowing values:
R Perm issible trailer load
R Perm issible rear axle load of theto wing vehi‐
cle
R Perm issible gross mass of theto wing vehicle
R Perm issible gross mass of the trailer
R Maximum permissible speed of the trailer
Ensure thefo llowing before starting a journey:
R The tyre pressure on there ar axle of theto w‐
ing vehicle is set for a maximum load
R The lighting of the connected trailer is opera‐
tional
R Vehicles without LED headlamps or MUL‐
TIBEAM LED headlamps: the headlamps
ha ve been set cor rectly
In theeve nt of increased rear axle load, the car/
trailer combination may not exceed a maximum
speed of 100 km/h forre asons concerning the
operating permit. This also applies in countri es
in which the permissible maximum speed for
car/trailer combinations is ab ove100 km/h. Extending/
retracting the ball ne ckfully 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 all-electric trailer
hitch due toadditional pressure The all-electric trailer hit
chcould be mechan‐
ically damaged byapplying additional pres‐
sure when the ball neck is being extended or
re tracted. #
Do not ma kethe ball neck extend/
re tract faster by applying additional
pressure. Re
quirements:
R The vehicle is secured against rolling away.
R The range of mo vement is clear. 256
Driving and parking
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R
The trailer cables or adap ter plugs ha vebeen
re mo ved.
Extending the ball neck fully electrically But
ton on theta ilgate But
ton on the driver's door #
Toextend: pull button 1.
Indicator lamp 2willflash and the display
message Trailer coupling extending… will
appear on the multifunction displa y.
The ball neck will extend fully electrically. #
Wait until the ball neck has loc ked in place.
The ball neck is securely loc ked in place
when indicator lamp 2is continuously lit.
If th e ball neck is not securely loc ked in
place, indicator lamp 2willflash and the
display message Check trailer hitch lock will
appear on the multifunction displa y.
Re tracting the ball ne ckfully electrical ly #
Pull button 1.
Indicator lamp 2willflash and the mes‐
sage Trailer coupling extending… will appear
on the multifunction displa y.
The ball neck will retract fully electrically. #
Wait until the ball neck has loc ked in place.
The ball neck is securely loc ked in place
once indicator lamp 2goes out.
If th e ball neck is not securely loc ked in
place, indicator lamp 2willflash and the
messa geCheck trailer hitch lock will appear
on the multifunction displa y.
Obser vethe information on the displa yson the
instrument clus ter:
R Indicator and warning lamps (/ page 567) Driving and parking
257
Page 261 of 629

R
Displ aymessa ges Coupling up / uncoupling a trailer
&
WARNING Risk of inju ryfrom theve hicle
le ve l being changed
The vehicle le vel may be changed unin ten‐
tional ly, e.g. by other people. You may
become trapped if you couple up or uncouple
a trailer while this is happening. In addition,
ot her people could become trapped if their
limbs are between theve hicle body and the
tyres or undernea th theve hicle.
Obser vethefo llowing when coupling up or
uncoupling a trailer: #
Do not open or close the doors or tail‐
ga te. #
Do not lo ckor unlock theve hicle. Re
quirements:
R The ball neck is extended and engaged in a
secu rely loc ked position Tr
ailers with a 7-pin plug can be connec tedto
th eve hicle with thefo llowing adap ters:
R Adapter plug
R Adapter 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 st
R Drive AwayAssi st
R Cross Traf fic Alert
R Reversing camera
R 360° camera 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 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 (/ page113). #
Position the trailer on a le vel sur face behind
th eve hicle and couple it up totheve hicle. 258
Driving and parking
Page 262 of 629

#
Open the soc ket cap. #
Inse rtthe plug with lug 1in groo ve3 on
th e soc ket. #
Turn the ba yonet coupling 2totheright 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.
Under thefo llowing conditions, a message may
appear on the multifunction display even if the
trailer has been connected 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 to180 W and tothe
po we r supp lythat is swit ched on via the igni‐
tion loc k. 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. #
Do not uncouple trailers with an
engaged overrun brake. *
NO
TEDama gewhen uncoupling in a
st ate of overrun Uncou
pling in a state of overru n can dama ge
th eve hicle. #
Do not uncouple trailers with an
engaged overrun brake. *
NO
TEDama getothere ar bumper from
ins talling adap ter cables or adapte r plugs The
following parts could be damaged when
swiveling the ball neck fully electrically:
R Bumper
R Adapter cable
R Adapter plug #
Alw aysre mo vethe adap ter cable or
adapte r plug before swive lingthe ball
neck fully electrically. #
Secure the trailer against rolling away. #
Disconnect the electrical connection
between theve hicle and the trailer. #
Uncouple the trailer. #
Place the co ver on the ball head. Driving and parking
259
Page 263 of 629

Bic
ycle rack function &
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. 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 geto, or cra cks on, the
trailer hitch due tounsuitable bic ycle
ra ck s or bicycle rack s being used incor‐
re ctly #
use only bicycle rack s appr ovedby
Mercedes-Benz. Tr
ailer hit ch(examp le with additional guide pin)
Depending on the bicycle rack 's design, dif fere nt
numbe rsof bicycles can be transpor ted.
The following bicycle rack designs are possible:
R When mounted byattaching tothe ball head
1, the maximum load capacity is 75kg.Up
to thre e bicycles can be transpor ted. 260
Driving and parking
Page 264 of 629

R
When mounted on the ball head 1and the
guide pin 2,the maximum load capacity is
10 0kg .Up tofour bic ycles can be transpor‐
te d.
The load capacity is calculated from thewe ight
of the bicycle rack and the bicycle rack load.
The vehicle's driving characteristics will change
when a bicycle rack isfitted. Adapt your driving
st yle accordingly. Drive carefully and maintain a
safe dis tance.
When using a bicycle rack , set the tyre pressure
fo r increased 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 492).
Note s on loading
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
Alw ays 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 bicycles (e.g. bask ets,
ch ild seats, rech arge able bat teries) before load‐
ing them onto the bicycle rack . This will impr ove
th e aerodynamic resis tance and centre of gr avity
of the bicycle rack.
Alw ays secure the bicycles toprev ent them from
moving around and check them at regular inter‐
va ls to ensure that they are secure.
Do not use tarp aulins or other co vers. The driv‐
ing characteristics and rear view may be
impaired. In addition, aerodynamic resis tance
and the load on the trailer hitch will increase. Load distribution on
the bicycle rack
1 Vertical dis tance between centre of gr avity
and ball head
2 Horizon tal dis tance between centre of gr av‐
ity and ball head
3 The centre of gr avity is on theve hicle's
centre axis Driving and parking
261