Page 137 of 416

#
Replace fuel filler cap 2and turn it clock‐
wise.
Yo u will hear a click when the fuel filler cap is
closed full y. #
Open the front left-hand door. #
Close fuel filler flap 1.
% Ve
hicles with a diesel engine and incor‐
re ct fueling pr otector against refueling
with gasoline: thefiller neck is designed for
re fueling at diesel filling pumps for passenger
ve hicles.
% Ve
hicles with a diesel engine without an
incor rect fueling pr otector: refueling pre‐
fe rred at diesel filling pumps for passenger
ve hicles. Ho wever,yo u can also refuel at a
diesel filling pump for truc ks.
% If
th e fuel tank has been run comple tely dr y,
add at least 1.3 ga l (5 l) of fuel. Problems with
the fuel and fuel tank Problem
Possible causes/consequences and 0050 0050Solutions
Fu el is leaking from the
ve hicle. The fuel line or
the fuel tank is de fective. #
Apply the parking brake. #
Switch off the engine. #
Remo vetheke y from the ignition loc k.
Or, on vehicles with KEYLESS‑GO: #
Open the driver's door.
The on-board electronics are in position 005A. This corresponds tothe
"k ey remo ved". #
Do not restart the engine under any circums tances. #
Consult a qualified specialist workshop.
The engine does not
st art. The fuel
tank has been run comple tely dr y. #
Refuel theve hicle with at least 1.3 ga l (5 l) of fuel. #
Swit chthe ignition on for appro ximately ten seconds. #
Start the engine continuously for a maximum of ten seconds until it
ru ns smo othly.
If th e engine does not star t: #
Switch the ignition on for appro ximately ten seconds. #
Start the engine continuously for a maximum of ten seconds until it
ru ns smo othly.
If th e engine does not start af terth re e attem pts: #
Consult a qualified specialist workshop. Driving and parking
13 5
Page 138 of 416

DEF
Note
s on DEF
* NO
TEWhen you open the DEF tank,
small amounts of ammonia vapor may
escape. #
Only fill th e DEF tank in well-ventilated
areas. #
Do not let DEF come into con tact wi th
skin, eyes or clo thes. #
Keep DEF away from children. *
NO
TEDo not ingest DEF. If DEF is swallo
wed: #
Immediately rinse out your mouth thor‐
oughly. #
Drink plenty of water. #
Seek medical attention immediately. *
NO
TEDama gecaused byadditives in
DEF or bydiluting DEF The DEF
exhaust gas af tertre atment sy stem
could be destr oyed bythefo llowing:
R Additives in DEF
R Diluting DEF #
Only use DEF in accordance with ISO
222 41 . #
Do not mix additives. #
Do not dilu teDEF. *
NO
TEDama geand malfunctions caused
by impurities in DEF Impurities in DEF
result in thefo llowing:
R Higher emission values
R Damage tothe catalytic con verter
R Engine damage
R Malfunctions in the DEF exhaust gas
af te rtre atment sy stem #
Avoid impurities in DEF. *
NO
TEDEF residue cr ystallizes af ter
some time. Remo veDEF residue. #
Immediately rinse su rfaces that come in
con tact wi thDEF when filling with
wate r. #
DEF can also be remo ved with a damp
clo thand cold water. #
If DEF has already cr ystallized, clean
using a spon geand cold water. DEF is a li
quid urea solution used forex haust gas
af te rtre atment of diesel engines. In order forthe
ex haust gas af tertre atment tofunction properly,
only use DEF in accordance with ISO 222 41 .
DEF has thefo llowing properties:
R non-t oxic
R colorless and odorless
R non-flammable
DEF availability:
R you can ha veDEF added byfast service at a
qu alified specialist workshop, e.g. an author‐
ized Mercedes-Benz Center.
R DEF is available at numerous gasst ations via
DEF filling pumps.
R alternatively, DEF is available at qualified spe‐
cialist workshops, e.g. an authorized
Mercedes-Benz Center, and at numerous gas
st ations as a DEF refill canis ter or DEF refill
bottle.
% DEF freezes at a
temp erature of appr ox‐
imately 12.2 °F (-11 °C). The vehicle is equip‐
ped with a DEF preheating sy stem at thefa c‐
to ry. This means that winter operation is also
ensured forte mp eratures below 12.2 °F
(-11 °C). If you add DEF at temp eratures
below 12.2 °F (-11 °C), the DEF le vel in the
instrument clus ter may not be displa yed cor‐
re ctly. If the DEF is frozen, drive for at least
20 minutes and then park theve hicle for a
minimum of 30 seconds, so that the le vel is
cor rectly displa yed. In extreme winter condi‐
tions, the time needed todetect theto p-up
amount may be considerably longer. Park the
ve hicle in a warm garage tospeed up this
process.
% Ensure
the connection between there fill con‐
ta iner and vehicle filler neck does not drip. 13 6
Driving and pa rking
Page 139 of 416

Calling up
the DEF le velga uge
On-board computer:
4 Service #
Select DEFand confirm.
The DEF le vel and the DEF range appear. Instrument Display wi
thcolor display
1 DEF le vel Instrument Display with black
and white dis‐
play
1 DEF le vel
Re filling DEF
* NO
TEEngine damage due toDEF being
in the fuel #
DEF must not be used tofill th e fuel
ta nk. #
Only use DEF tofill th e DEF tank. #
Do not overfill the DEF tank. *
NO
TEContamination of theve hicle inte‐
ri or due toDEF leakage #
After adding, careful lyclose the DEF
re fill con tainer. #
Avoid car rying DEF refill con tainers per‐
manently in theve hicle. Re
quirements:
R The ignition is switched off.
The following messages that appear in succes‐
sion in the multifunction display indicate that you
need torefill th e DEF tank:
R Refill Additive See Operator's Manual
The DEF tank has fallen below thefirs twa rn‐
ing thre shold.
R Refill Additive Starts until Emerg. Op.: XXX
See Operator's Manual
The DEF supply has fallen below there ser ve
mar k.
Af terth e message appears forth efirs t time,
th ere maining DEF supp lywill last for appro x‐
ima tely 1,200 mi (1,900 km) and you can
st art the engine a fur ther 16 times. The num‐
ber of remaining engine starts XX(16 to1) is
shown in the message everytime the engine
is star ted.
R Refill Additive Emergency Op.: XXX mph See
Operator's Manual
You can only drive theve hicle at a maximum
speed of 5 mph (8 km/h).
Re fill qu antity:
Wi th a prom ptinthe displa ya t least 2 l
Wi thout a prom ptinthe displa yat least 8 l Yo
u can also ha vethe DEF le vel displa yed
( / page 137).
Opening the DEF filler cap on filler caps that
are not loc kable #
Open the hood. Driving and parking
137
Page 140 of 416
#
Turn DEF filler cap 1coun ter-clockwise and
re mo veit.
Opening the DEF filler cap on loc kable filler
caps #
Open the hood. #
Take tool 4 for unlocking DEF filler cap 1
from theve hicle tool kit. #
Pull co ver3 on DEF filler cap 1up, turn
90° and release. #
Insert tool 4 in holes 2of DEF filler cap
1. #
Turn DEF filler cap 1coun ter-clockwise and
re mo veit. Preparing
the DEF refill canis ter Va
riant 1 Va
riant 2 #
Unscr ewthe cap on DEF refill canis ter1. #
Screw disposable hose 2onto the opening
of DEF refill canis ter1 until hand-tight. 13 8
Driving and pa rking
Page 141 of 416

Re
filling DEF Va
riant 1 Va
riant 2 #
Screw disposable hose 2onto thefiller neck
of theve hicle until hand-tight. #
Lift up and tip DEF refill canis ter1.
The filling process stops when the DEF tank is
comple tely full.
DEF refill canis ter1 can be remo ved when it
has been only partially em ptied. #
Unscr ewdisposable hose 2and close DEF
and refill canis ter1 inreve rse order. #
Switch on the ignition for at least 60 seconds. #
Start theve hicle.
% Av
oid storing DEF containers permanent lyin
th eve hicle.
DEF refill bottle
Only scr ewthe DEF refill bottle hand-tight onto
th efiller opening in the engine compartment. It
may otherwise be damaged. DEF
refill bottles 1can be obtained at many gas
st ations or at a qualified specialist workshop.
Re fill bottles without a thre aded cap of fer no
ove rfill pr otection. DEF may leak out as a result
of ove rfilling. Mercedes-Benz of fers special refill
bottles with a thre aded cap. You can obtain this
from an authorized Mercedes-Benz Center. #
Unscr ewthe pr otective cap from DEF refill
bottle 1. #
Place DEF refill bottle 1as shown on filler
opening 2and scr ewit on clockwise until
hand-tight. #
Press DEF refill bottle 1towa rdsfiller open‐
ing 2.
The DEF tank is filled. This could take up to
one minute.
% When
the DEF refill bottle is no longer
pressed down, filling stops. The bottle can be
re mo ved when it has been only partially emp‐
tied. #
Let go of DEF refill bottle 1. Driving and parking
13 9
Page 142 of 416

#
Turn DEF refill bottle 1coun ter-clockwise
and remo veit. #
Screw the pr otective cap onto DEF refill bot‐
tle 1 again.
Fi lling procedure with the pu mpnozzle of an
DEF filling pump #
Insert the pump nozzle into thefiller neck and
add DE F.When doing so, do not overfill the
DEF tank. You can also use an DEF filling
pump for truc ks.
Closing the DEF filler cap on filler caps that
are not loc kable #
Afterfilling the DEF tank, place DEF filler cap
1 onthefiller neck and tigh ten it clo ckwise. #
Turn the DEF filler cap until the lettering is
legible and horizontal.
The filler neck is only loc ked cor rectly when
th is is the case. #
Close the hood. Closing
the DEF filler cap on loc kable filler
caps #
Afterfilling the DEF tank, place DEF filler cap
1 onthefiller neck and tigh ten it clo ckwise. #
Remo vetool 4 from DEF filler cap 1and
st ore it in theve hicle tool kit. #
Pull co ver3 on DEF filler cap 1upover
holes 2of DEF filler cap 1, turn and
re lease. #
Turn DEF filler cap 1.
If DEF filler cap 1turns freel y,the DEF tank
is closed. Park
ing Pa
rking theve hicle &
WARNING Risk offire caused byhot
ex haust sy stem parts
Flammable material such as lea ves, grass or
twigs may ignite if they come into contact
wi th hot parts of theex haust sy stem or
ex haust gasflow. #
Park theve hicle so that no flammable
material can come into con tact wi thhot
ve hicle components. 14 0
Driving and pa rking
Page 143 of 416

#
In particula r,do not park on dry grass‐
land or har vested grain fields. &
WARNING Risk of accident and inju ry
due tochildren left unat tended in the
ve hicle
If ch ildren are left unat tended in theve hicle,
th ey could:
R Open doo rs,th ereby endangering other
persons or road users.
R Get out and be stru ck byoncoming traf‐
fi c.
R Ope rate ve hicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion, forex ample by:
R Releasing the parking brake.
R Changing the transmission position.
R Starting theve hicle. #
Never lea vechildren unat tended in the
ve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle. #
Keep theve hicle key out of reach of
ch ildren. *
NO
TEDama getotheve hicle or the drive‐
train due torolling away #
Always park your vehicle safely and
according tolegal requirements. #
Always proper lysecure theve hicle
against rolling away. &
WARNING Risk of accident and inju ryif
parking brake is not applied
If yo u park theve hicle with the transmission
in park position 005Dand the parking brake is
not engaged, theve hicle may rollaw ay.
Engaging pa rkposition 005Dis not a fully ade‐
qu ate replacement forth e parking brake.
There is a risk of accident and injur y.#
Secu retheve hicle against rolling away
as desc ribed belo w. Obser
vethefo llowing points toensure that the
ve hicle is properly secured against rolling away
unin tentionally: #
alwa ys apply the parking brake. #
Vehicles with automatic transmission:
engage transmission position 005D. #
On uphill or downhill inclines: turnthe
front wheels towa rdsth e curb. #
On uphill or downhill inclines: securethe
re ar axle with a chock or an object without
sharp edges.
% Yo
u can operate the side windo wsforfive
minutes af teryo u ha veswitched off theve hi‐
cle. Manual parking brake
Applying/releasing
the handbrake le ver &
WARNING Risk of skidding or an acci‐
dent bybraking with the parking brake
If yo u ha vetobrake your vehicle with the
parking brake, the braking dis tance is consid‐
erab lylonger and the wheels may loc k.There
is an increased risk of skidding and/or acci‐
dent. #
Only brake theve hicle with the parking
brake if the service brake has failed. #
Inthis case, do not apply the parking
brake with too much forc e. #
Ifth e wheels loc k,immediately release
th e parking brake as much as required
fo rth e wheels toturn again. &
WARNING Risk offire and an accident if
th e parking brake is not released
If th e parking brake is not fully released when
driving, thefo llowing situations can occur:
R The parking brake can overheat and cause
a fire
R The parking brake can lose its holding
function #
Comple tely release the parking brake
before driving off. The brake lights do not light up when
you brake
th eve hicle with the parking brake. Driving and parking
141
Page 144 of 416

Gene
rally, you may only apply the parking brake
when theve hicle is stationar y. #
Toapply the pa rking brake: pull handbrake
le ve r1 up as far as the last possible de tent.
When the engine is running, the0049
and 0024 (USA) or 0024(Canada) indicator
lamps in the Instrument Display light up. If
th eve hicle is in motion, a warning tone
sounds.
% In
vehicles with a folding handbrake le ver,
yo u can then press handbrake le ver1 down
as far as it will go. #
Torelease the pa rking brake: onvehicles
with a folding handbrake le ver,firs t pull hand‐
brake le ver1 up as far as it will go. #
Guide handbrake le ver1 down toas far as it
will go.
The 0049 and0024 (USA) or 0024(Canada)
indica tor lamps in the instrument display go
out.
Fo lding the handbrake le ver up or down (only
in vehicles with a folding handbrake le ver)
Re quirements:
R The handbrake le ver is applied. #
Tofold down the handbrake le ver:push the
handbrake le ver down as far as it will go. #
Toraise the handbrake le ver:pull the hand‐
brake le ver up as far as it will go. Pe
rforming emer gency braking with the hand‐
brake le ver If, in
exceptional cases, the service brake fails,
yo u may use the parking brake toper form emer‐
ge ncy braking. #
Eme rgency braking: press and hold release
button 2and carefully pull brake le ver1. Electric parking brake
Information on
the electric pa rking brake &
WARNING Risk of accident and injury
due tochildren left unat tended in the
ve hicle
If ch ildren are left unat tended in theve hicle,
th ey could:
R Open doo rs,th ereby endangering other
persons or road users.
R Get out and be stru ck byoncoming traf‐
fi c.
R Ope rate ve hicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion, forex ample by:
R Releasing the parking brake.
R Changing the transmission position.
R Starting theve hicle. #
Never lea vechildren unat tended in the
ve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle. #
Keep theve hicle key out of reach of
ch ildren. 14 2
Driving and pa rking