Page 177 of 354

sequently enters
the monitoring range di rectly
next toyour vehicle, thewa rning lamp in the out‐
side mir ror lights up red.
% When a trailer is connected,
thera dar sen‐
sor's field of vision may be impaired, thereby
making limited monitoring possible. Alw ays
pay careful attention tothe tra ffic situation
and maintain a safe dis tance at the side of
th eve hicle.
If a vehicle is de tected close to yourvehicle in the
lateral monitoring range and you swit chon the
turn signal indica tor in the cor responding direc‐
tion, a warning tone sounds. The redwa rning
lamp in the outside mir rorflashes. If the turn sig‐
nal indicator remains switched on, all other
de tected vehicles are indicated only bytheflash‐
ing of there dwa rning lamp.
If yo uove rtake a vehicle quickl y,no warning is
given.
Exit warning
The exitwa rning is an additional function of Blind
Spot Assist and warnsve hicle occupants when
leaving theve hicle about any approaching vehi‐
cles. &
WARNING Risk of accident despite exit
wa rning
The exitwa rning reacts nei ther tostationary
objects nor tovehicles approaching you at a
great lydif fere nt speed.
As a result, theex itwa rning cannot warndriv‐
ers in these situations. #
Always pay particular attention tothe
traf fic situation when opening the doors
and make sure there is suf ficient clear‐
ance. %
An
exitwa rning is not issued for sliding doors
and rear-end doors. Overview
When theve hicle is
st ationar y,an object
is de tected from
behind in the monitor‐
ing range. Display in outside mir‐
ror
When theve hicle is
st ationar y,a door on
th ere leva nt side of
th eve hicle is opened.
An object which is
close to yourvehicle
is de tected in the
monitoring range. Vi
sual and audible
wa rning %
This additional function is only
available when
Blind Spot Assist is activated and up to a
maximum of thre e minutes af terth e ignition
has been switched off. The end of theav aila‐
bility of theex itwa rning function is indicated
by a series of flashes in the outside mir ror.
The exitwa rning function is only an aid and is no
substitute forth e attentiveness of theve hicle
occupants. Responsibility alw ays lies with the
ve hicle occupants when opening doors and leav‐
ing theve hicle.
Sy stem limitations
Blind Spot Assist and theex itwa rning function
may be limited in thefo llowing situations:
R ifth ere is dirt on the sensors or the sensors
are obscured
R ifth ere is poor visibility, e.g. due tofog, heavy
ra in, snow or spr ay
R if nar rowvehicles are within the monitoring
ra nge, e.g. bicycles
% St
ationary or slowly moving objects are not
displa yed.
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 truc ks,fo r a
prolonged time.
Blind Spot Assist is not operational when reve rse
ge ar is engaged.
The exitwa rning function may be limited in the
fo llowing situations:
R when the sensor is bloc kedby adjacent vehi‐
cles in nar rowparking spaces
R when people are approaching Driving and parking
15 3
Page 178 of 354

Ac
tivating/deactivating Blind Spot Assi st
Multimedia sy stem:
4 © 5
Settings 5
Assistance #
Activate or deacti vate Blind Spot Assist . Fu
nction of Drive Away Assist %
Drive
Away Assistis only available forve hi‐
cles with automatic transmission.
Drive Away Assistcan reduce the se verity of an
impact when pulling away. If an obs tacle is de tec‐
te d in the direction of tra vel,th eve hicle's speed
is brief lyreduced toappr ox. 1 mph (2 km/h). If a
critical situation is de tected, a symbol appea rson
th e camera image of the multimedia sy stem. &
WARNING Risk of accident caused by
limited de tection per form ance of Drive
Aw ayAssi st
Drive AwayAssi stcannot al ways clea rly iden‐
tify objects and traf fic situations.
In such cases, Drive AwayAssi stmight:
R Warnyou without reason and limit the
ve hicle speed.
R Not warnyou or not limit theve hicle
speed. #
Always pay careful attention tothe traf‐
fi c situation; do not relyon Drive Away
Assi stalone. #
Be prepared tobrake or swer veas nec‐
essar y,prov ided the tra ffic situation
permits and that it is safe totake eva‐
sive action. Drive
Away Assistis only an aid. It is not a substi‐
tute foryo ur attention tothe sur roundings. The
re sponsibility for safe maneu vering and pa rking
re mains with you. Make sure that no persons,
animals or objects etc. are in the maneuvering
ra nge.
A risk of a collision may arise in thefo llowing sit‐
uations, forex ample:
R Ifth e driver mixes up the accelerator and
brake pedals.
R Ifth e wrong gear is selec ted.
The Drive AwayAssi stfunction is active under the
fo llowing conditions:
R IfPa rking Assist PARKTRONIC is activated. R
Every time thege ar is changed to005E or005B
when theve hicle is at a standstill.
R Ifth e de tected obs tacle is less than appr ox.
3.3 ft(1.0 m) away.
R Ifth e maneuvering assis tance function is acti‐
va ted in the multimedia sy stem.
Sy stem limitations
Drive AwayAssi stis not available on inclines and
when driving with a trailer. Fu
nction of Rear Cross Traf fic Alert The
radar sensors in the bumper are used forthe
sy stem. This wayth e area adjacent totheve hicle
is continually monitored. If thera dar sensors are
obscured byvehicles or other objects, de tection
is not possible.
% Also
read the no tes on Blind Spot Assist
(/ page 152).
Ve hicles with Blind Spot Assis t:drivers can
also be warned of any crossing tra ffic when back‐
ing up out of a parking space. If a vehicle is
de tected, thewa rning lamp in the outside mir ror
on there leva nt side lights up red. If it de tects a
critical situation, a warning tone also sounds.
Ve hicles with Blind Spot Assist and Parking
Assist PARKTRONIC: drivers can also be warned
of any crossing tra ffic when backing up out of a
parking space. If a critical situation is de tected, a
wa rning symbol appears on the camera image of
th e multimedia sy stem. If the driver does not
re spond tothewa rning, theve hicle's brakes can
be applied automatically. In this case, a warning
to ne sounds.
The Rear Cross Traf fic Alert function is acti ve
under thefo llowing conditions:
R Blind Spot Assist is activated.
R Reversege ar is engaged or theve hicle is
backing up at walking pace.
R Ifth e maneuvering assis tance function is acti‐
va ted in the multimedia sy stem.
The Rear Cross Traf fic Alert function is una vaila‐
ble when driving with a trailer. 15 4
Driving and pa rking
Page 179 of 354

Lane
Keeping Assist and Active Lane Keeping
Assist Fu
nctions of Lane Keeping Assist Lane
Keeping Assist monitors the area in front of
yo ur vehicle with multifunction camera 1. It
ser vesto protect you against unin tentionally le av‐
ing your lane. You may also be warned by a
vibrating messa gefrom thesteering wheel and by
th est atus symbol flashing in the instrument dis‐
pla y.
The warning is issued when thefo llowing condi‐
tions are met at the same time:
R Lane Keeping Assist de tects lane markings.
R A front wheel passes overth e lane markings.
Yo u can activate and deactivate the Lane Keeping
Assist warning.
If yo ufa ilto adapt your driving style, Lane Keep‐
ing Assist can neither reduce therisk of accident
nor override the la wsof ph ysics. It cannot take
into account road, weather or traf fic conditions.
Lane Keeping Assist is only an aid and is not
intended tokeep theve hicle in the lane without
th e driver's cooperation. You are responsible for
th e dis tance totheve hicle in front, forve hicle
speed, braking in good time and forst ay ing in
yo ur lane.
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing situations:
R There is poor visibilit y,e.g. due toinsuf ficient
illumination of thero ad, highly variable shade
conditions, or due torain, sno w,fog or heavy
spr ay.
R Glare from oncoming traf fic, direct sunlight or
re flections. R
There is dirt on the windshield in the vicinity
of the multifunction camera or the camera is
fo gged up, damaged or obscured.
R No or se veral, unclear lane markings are pres‐
ent for one lane, e.g. in a construction area.
R The lane markings are worn, dark or co vered.
R The dis tance totheve hicle in front is too
small, and therefore the lane markings cann ot
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.
Fu nctions of Active Lane Keeping Assist Ac
tive Lane Keeping Assist monitors the area in
front of your vehicle bymeans of multifunction
camera 1. It ser vesto protect you against unin‐
te ntionally le aving your lane. You may also be
wa rned bya vibrating message from thesteering
wheel and bythest atus symbol flashing in the
instrument displa y.In addition, you may be gui‐
ded back into your lane bya lane-cor recting
brake application. A releva nt messa geappears in
th e instrument displa y.
The warning is issued when thefo llowing condi‐
tions are met at the same time:
R The driving sy stem de tects lane markings.
R A front wheel passes overth e lane markings.
A lane-cor recting brake application occu rswhen
th efo llowing conditions are me t:
R Active Lane Keeping Assist de tects lane
markings on bo thsides of theve hicle.
R A front wheel drives over a solid lane mark‐
ing. Driving and parking
15 5
Page 180 of 354

A
releva nt messa geappears in the instrument
displa y.
The brake application is available in the speed
ra nge between appr oximately 40 mph (60 km/h)
and 100mp h (160 km/h).
Yo u can either deactivate theAc tive Lane Keep‐
ing Assist warning or switch off the sy stem com‐
ple tely.
If yo ufa ilto adapt your driving style, Ac tive Lane
Ke eping Assist can neither reduce therisk of an
accident nor override the la wsof ph ysics. It can‐
not take into account road, weather or traf fic
conditions. The driving sy stem is an aid for when
yo u unin tentionally le aveor cross the lane and
not a sy stem for automatically keeping tothe
lane. You are responsible forth e dis tance tothe
ve hicle in front, forve hicle speed, braking in good
time and forst ay ing in your lane. If a lane-cor
recting brake application from Active
Lane Keeping Assist occurs, display 1appears
in the multifunction displa y.
Sy stem limitations
No lane-cor recting brake application from Active
Lane Keeping Assist occurs in thefo llowing situa‐
tions:
R You clearly and actively steer, brake or accel‐
erate.
R You swit chon the turn signal.
R A driving saf ety sy stem inter venes, su chas
ESP ®
or Active Brake Assi st.
R You ha veadop ted a sporty driving style with
high cornering speeds or high rates of accel‐
eration.
R ESP ®
has been switched off.
R When driving with a trailer, the electrical con‐
nection tothe trailer has been cor rectly
es tab lished.
R If a loss of tire pressure or a defective tire has
been de tected and displa yed. The sy
stem may be impaired or may not function
in thefo llowing situations:
R There is poor visibilit y,e.g. due toinsuf ficient
illumination of thero ad, highly variable shade
conditions, or due torain, sno w,fog or heavy
spr ay.
R Glare from oncoming traf fic, direct sunlight or
re flections.
R There is dirt on the windshield in the vicinity
of the multifunction camera or the camera is
fo gged up, damaged or obscured.
R No or se veral, unclear lane markings are pres‐
ent for one lane, e.g. in a construction area.
R The lane markings are worn, dark or co vered.
R The dis tance totheve hicle in front is too
small, and therefore the lane markings cann ot
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.
Ac tivating/deactivating Lane Keeping Assist
or Active Lane Keeping Assist
Multimedia sy stem:
4 © 5
Settings 5
Assistance #
Select Lane Keeping Assist orAct. Lane
Keep Asst. On.
Ac tivating or deactivating warning #
Select Lane Keeping Assist orAct. Lane
Keep Asst. On. #
Select Warning. Wo
rkmode ADR (working speed control)
Fu
nction of ADR (working speed control)
When activated, ADR automatically increases the
engine speed toa preset speed or a speed you
ha ve set.
% Af
ter a cold start, the idle speed of the
engine is increased automaticall y.Ifth e pre‐
set working speed is lo werth an the
inc reased idle speed, thewo rking speed is
only reached once the engine has comple ted
th ewa rm-up phase.
It is only possible toactivate ADR with the
ve hicle stationary and the parking brake
applied.
On vehicles with automatic transmission, the
selector le ver must be in position 005D. 15 6
Driving and pa rking
Page 181 of 354

Ac
tivating/deactivating ADR #
Toactivate: whilethe engine is running,
press switch 1.
The Working Speed Governor Active message
appears in the multifunction displa y.#
Todeactivate: whilethe engine is running,
press switch 2.
ADR goes out au tomatical lyin thefo llowing situa‐
tions:
R Youre lease the parking brake.
R You depress the brake pedal.
R The vehicle mo ves.
R The contro l unit detects a malfunction.
Ad justing ADR #
Engage po werta ke -off or acti vate ADR. #
Toincrease: press switch 1. #
Toreduce: press switch 2. Tr
ailer operation Note
s ontowing a trailer &
WARNING Risk of accident‑ and injury if
th e load is exceeded
If yo uexc eed the permitted load when using
th era ck ,th era ck system may disconnect
from theve hicle and endanger other road
users. #
Always comply with the permitted load
when using thera ck. &
WARNING Swerving of theve hicle/
trailer combination due toinc reased
speed
If th eve hicle/trailer combination swer ves,
yo u can lose control of it.
The vehicle/trailer combination can even tip
ove r. #
Under no ci rcums tances should you try
to inc rease the speed tostra ighten the
ve hicle/trailer combination. #
Reduce speed and do not counter-s teer. #
If necessar y,apply the brakes. &
WARNING Risk of accident due tothe
brake sy stem overheating
If yo u lea veyour foot on the brake pedal
when driving, the brake sy stem may overheat.
This increases the braking dis tance and the
brake sy stem may evenfa il. #
Never use the brake pedal as a foot re st. #
Do not depress the brake pedal and the
accelerator pedal at the same time
while driving. &
WARNING Danger of accident due to
unsuitable ball coupling
If yo u ins tall an unsuitable ball coupling, over‐
loading of the trailer hitch and rear axle will
be there sult. This is particularly the case if
th e ball coupling is relatively long or angled
dif fere ntl y.
The handling characteristics may be heavily
impaired and the trailer can become
de tach ed. There is a risk of fata l injur y. #
Only ins tall a ball coupling that meets
th e permitted dimensions and has been Driving and parking
157
Page 182 of 354

designed
forth e trailer operation
re qu irements. #
Do not modify the ball coupling or the
trailer hitch. &
WARNING Risk of accident and inju ry
due toan incor rectly ins talled ball cou‐
pling
If th e ball coupling is not ins talled and
engaged cor rectly, it may become de tach ed
during tr avel and endanger other road users.
There is a risk of fata l injur y. #
Install and secure the ball coupling as
described in the ball coupling manufac‐
turer's ins tallation instructions. #
When the ball coupling has been ins tal‐
led, ensure that it is cor rectly secu red
before every trip. &
WARNING Risk of accident due toan
incor rectly ins talled and secured ball
neck
If th e ball neck is not cor rectly ins talled and
secured, the trailer can become de tach ed. #
Install and secure the ball neck as
described in the ball neck manufactur‐
er's ins tallation instructions. #
When the ball neck has been ins talled,
ensure that it is cor rectly secu red
before every trip *
NO
TEWearing out the brake linings by
continuously dep ressing the brake pedal #
Do not depress the brake pedal continu‐
ously whilst driving. #
Touse the braking ef fect of the engine,
shift toa lo werge ar in good time. Alw
ays comply with the operating instructions of
th e manufacturer of the trailer coupling and the
ball nec k.
Place your vehicle/trailer combination on sur fa‐
ces that are as even as possible and secu reit
against rolling away ( /page 132). Couple and
uncouple the trailer carefully.
When backing up theto wing vehicle, ensure that
th ere is no-one between theve hicle and the
traile r. If
yo u do not connect the trailer totheto wing
ve hicle cor rectly, the trailer may become
de tach ed. Once it has been connected and is
ro adwor thy, the trailer must be in a horizontal
position behind theto wing vehicle.
No tethefo llowing rega rding theto ngue weight:
R Make full use of the maximum tongue weight,
where possible
R Do not exceed or fall below the permitted
to ngue weight
Do not exceed thefo llowing values:
R Perm itted braked or unbraked towing capa‐
city
The maximum permissible towing capacity for
traile rswithout a separate braking sy stem is
1, 653 lbs (750 kg).
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 Perm issible gross towing mass
R Maximum permissible speed of the trailer
The releva nt pe rmitted values, which must not be
exc eeded, can be found in thefo llowing places:
R Inyour vehicle documents
R Onthe identification plate of the trailer hitch
R Onthe trailer's identification plate
R Ontheve hicle identification plate
If th ere are discrepancies between theva lues, the
lo we stone shall appl y.
Before driving off, ensu rethefo llowing:
R The tire pressure on there ar axle of theto w‐
ing vehicle has been set forth e maximum
load.
R The headlamps ha vebeen set cor rectly.
Va lues appr ovedby the manufacturer can be
fo und on the identification plates and in the sec‐
tion forth eto wing vehicle (/ page 235).
Yo ur vehicle will act dif fere ntly wi tha trailer rela‐
tive towithout a trailer:
R The vehicle/trailer combination will be heav‐
ier.
R The vehicle/trailer combination will be
re stricted in its acceleration and climbing
ability. 15 8
Driving and pa rking
Page 183 of 354

R
The vehicle/trailer combination will ha vean
inc reased braking dis tance.
R The vehicle/trailer combination will be more
susceptible tocrosswind gu sts.
R The vehicle/trailer combination will requ ire
more sensitive steering.
R The vehicle/trailer combination will ha ve a
lar ger turning radius.
This may impair theve hicle's driving characteris‐
tics.
When driving with a vehicle/trailer combination,
alw ays adapt your speed tothe cur rent road and
we ather conditions. Drive carefull y.Ke ep a suf fi‐
cient safe dis tance.
Co mply withthe maximum speed of 49 mph
(80 km/h) or 62 mph (100 km/h), even in coun‐
tries in which higher speeds are permitted for
ve hicle/trailer combinations.
Comply with the legally prescribed maximum
speed forve hicle/trailer combinations in forc e in
th e count ry,st ate or Canadian pr ovince in ques‐
tion. Before driving, consult the trailer's vehicle
documents tosee the maximum permissible
speed foryo ur trailer.
At tach only an appr oved trailer hitch to yourvehi‐
cle. Use only a ball neck that has been appr oved
fo ryo ur vehicle. Further information about availa‐
bility and ins tallation of the trailer electrical sys‐
te m is available from any qualified specialist
wo rkshop.
The trailer hitch is one of the most impor tant
ve hicle parts forro ad saf ety. Comply with the
instructions on operating, maintaining and servic‐
ing in the manufacturer's operating instructions.
% Yo
ur vehicle's bumpers are not suitable for
ins talling de tach able trailer tow hit ches.
Do not attach any rented trailer tow hit ches or
any other de tach able trailer tow hit ches tothe
bumpers.
% When using a trailer,
remember that
PA RKTRONIC is available only toa limited
ex tent, if at all.
% The ball head height will
change depending
on theve hicle's load. In this case, use a
trailer with a height-adjus table dr awbar.
Driving no tes
The maximum permissible speed forve hicle/
trailer combinations depends on the type of
trailer. Before driving, consult the trailer's vehicle documents
tosee the maximum permissible
speed foryo ur trailer.
Yo ur vehicle will act dif fere ntly wi tha trailer rela‐
tive towithout a trailer, and will consume more
fuel. In the case of a long and steep descent, you
must select shift range 3,2or 1in good time.
% This also applies if
the cruise cont rol is
switched on.
Yo u will thereby make use of the engine's braking
ef fect and will not ha vetobrake as of tento con‐
trol the speed. This will take some of thest ra in
off the brake sy stem and pr event the brakes from
ove rheating and wearing tooqu ickl y.Ifyo u need
additional braking, depress the brake pedal inter‐
mittently rath er than continuousl y.
Driving tips
If th e trailer sw ays, remember thefo llowing
points:
R Do not accelerate under any circums tances.
R Do not counter steer.
R If necessar y,apply the brakes.
% Yo
u can pr eventthe trailer from sw aying and
rock ingbyretrofitting stabilizer bars or trailer
st ability programs. You can obtain fur ther
information from an authorized Mercedes-
Benz Center.
R Maintain a lar ger dis tance than when driving
without a trailer.
R Avoid braking abruptl y.If possible, brake gen‐
tly firs t of all so that the trailer closes up
behind your vehicle. Then, increase the brak‐
ing forc era pidl y.
R The values given forst art-off gradeability
re ferto sea le vel. When driving in moun tain‐
ous areas, no tethat engine output, and there‐
fo re start-off gradeability, will dec rease with
inc reasing altitude. Coupling/uncoupling a trailer
Coupling a trailer
* NO
TEDama getotheve hicle battery due
to full discharge 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. Driving and pa
rking 15 9
Page 184 of 354

#
Shift the selector le verto position 005D. #
Apply theve hicle's parking brake. #
Close all the doors. #
Position the trailer on a le vel sur face behind
th eve hicle.
% The ball head height
changes depending on
th eve hicle's load. In this case, use a trailer
with a height-adjus table trailer dr awbar. #
Couple up the trailer. #
Establish all electrical and other connections
to the trailer. #
Remo veobjects or devices which pr eventthe
trailer from rolling, e.g. wheel choc ks. #
Release the trailer's parking brake.
% The
vehicle harness has a cable connection
to the brake light indicator lamp.
Obser vethe maximum permissible trailer dimen‐
sions (width and length).
Most US states and all Canadian pr ovinces pre‐
scribe thefo llowing points, and you are ur gently
re commended tocomply wi th these:
R Safetych ains between theto wing vehicle and
th e trailer. The chains should be routed in a
criss-cross pat tern under the trailer dr awbar.
They must be connected tothe trailer tow
hitch and not tothe bumper or totheve hicle
axle.
Lea vesuf ficient sla ckinthech ains. This
allo wsforeve n sha rpcornering.
R A separate brake sy stem is requ ired for cer‐
ta in trailers.
R A saf etyfe ature is requ ired for braked trailers.
De term ine the specific requ irements acco rd‐
ing tothere leva nt la ws.
If th e trailer becomes de tach ed from theto w‐
ing vehicle, the saf etyfe ature triggers the
trailer brakes and can thus reduce the danger.
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. Do not uncouple a trailer with an
overrun brake in
a st ate of overrun. Otherwise, there bound of the
ove rrun brake can damage your vehicle. #
Shift the selector le verto position 005D. #
Apply theve hicle's parking brake. #
Close all the doors. #
Apply the trailer's parking brake. #
Secure the trailer against rolling away with a
wheel chock or similar object. #
Remo vethe trailer cables and saf etych ains. #
Uncou plethe trailer. Information about
towing a trailer Operating a trailer is subject
tomany statutory
re gulations such as speed restrictions.
Many states also requ ire an auxiliary separate
functional braking sy stem when towing a weight
th at exc eeds a cer tain limit. Foryo ur saf ety, it is
re commended touse a separate functional brak‐
ing sy stem on any towe dve hicle.
Make sure that your trailer combination meets
local regulations. This not only applies to your
place of residence, but also to your destination.
In fo rm ation on this can be obtained from the
police and local authorities.
Comply with thefo llowing when driving with a
trailer:
R Practice cornering, stopping and backing up
in a traf fic-free location. In this wa y,yo u will
ga in driving experience and become accus‐
to med tothe new handling characteristics.
R Before driving, check thefo llowing:
- that the trailer tow hit chand ball coupling
are secure
- that the saf ety swit chfor braked trailers is
functioning cor rectly
- that the saf etych ains are secure and
undamaged
- that the electrical connections are secure
- that the lights are functioning cor rectly
- the wheels for dama geand cor rect tire
pressure (/ page 232)
R Adjust the outside mir rors so that you ha ve a
clear view of there ar section of the trailer.
R Ifth e trailer is equipped with an individual
braking sy stem, check before each journey
whe ther the brakes are functioning cor rectl y. 16 0
Driving and pa rking