Page 145 of 354

DSR is in
standby mode.
R DSR is inactive:
-
as soon as youexc eed a speed of 28 mph
(45 km/h).
- DSR appears in thest atus area of the on-
board computer. In addition, theDSR Off
message appears.
- DSR - - - appears in thest atus area of the
on-board computer.
Setting the speed while driving downhill
Yo u can set the speed depending on thege ar
ra nge tobetween 2 mph (4 km/h) and 11mph
(18 km/h) using the brake and accelerator pedals
or therock er switch on thesteering wheel. #
Brake or accelerate theve hicle tothe desired
speed on the downhill gradient. #
Release the brake or accelera tor pedal.
The cur rent speed is stored.
or #
Press rocker switch 1up or down during a
DSR regulation.
The last sa ved speed is increased or reduced. #
Release rocker switch 1.
The cur rent speed is stored.
or #
Press rocker switch 1up or down until
desired speed is reached. #
Release rocker switch 1.
The cur rent speed is stored.
% It may be a moment before
theve hicle starts
to brake tothe set speed. Take this delay into
account when setting the speed with rock er
switch 1. Deactivating DSR
#
Press the upper section of switch 1.
or #
Accele rate and drive fasterthan 28 mph
(45 km/h).
DSR deactivates automatically in thefo llowing
situations:
R As soon as youexc eed a speed of 28 mph
(45 km/h).
R There is a malfunction in the ESP ®
or ABS
sy stem. Electronic le
vel control Fu
nction of ENR (electronic le vel control) &
WARNING Risk of entrapment from vehi‐
cle lo wering
When lo wering theve hicle, people could
become trapped if their limbs are between
th eve hicle body and the tires or underneath
th eve hicle. #
Make sure no one is underneath the
ve hicle or in the immediate vicinity of
th e wheel ar ches when you lo werthe
ve hicle. &
WARNING Risk of inju ryfrom jack tip‐
ping
If yo u park a vehicle with air suspension, the
air suspension may remain activated for up to
one hour, even when the ignition is switched
off. If youth en raise theve hicle with the jac k,
th e air suspension will attem pttoadjust the
ve hicle le vel. Driving and parking
121
Page 146 of 354

The jack may tip.
#
Press the Service button on the air sus‐
pension remo tecontrol before raising
th eve hicle.
This pr events au tomatic readjustment
of theve hicle le vel and pr events it from
being raised or lo wered manually. &
WARNING Risk of accident due tolow‐
ered or raised chassis
Driving with a lo wered or raised chassis may
greatly impair braking and handling charac‐
te rist ics. You may also exceed the permissible
ve hicle height when thech assis is raised. #
Set the driving le vel before pulling away. &
WARNING Risk of accident from mal‐
function of electronic le vel control
If elect ronic le vel control is malfunctioning,
th eve hicle le vel may be asymmetrical, too
high or too lo w.
The driving and steering characteristics of the
ve hicle may be noticeably dif fere nt. #
Adapt your driving style according lyand
drive carefull y. #
Stop, paying attention toroad and traf‐
fi c conditions. #
Consult a qualified specialist workshop. *
NO
TERisk of damage tothech assis from
lo we redve hicle le vel If electronic le
vel control is malfunctioning or
re adjusts while you are driving, theve hicle
le ve l may be lo wered. #
Pay attention tothero ad conditions and
ensure there is suf ficient ground clear‐
ance. #
Drive carefully. The le
vel of theve hicle depends on vehicle load
and the load distribution. Elect ronic le vel control
adjusts the le vel of there ar axle automatically on
ve hicles with an air-sprung rear axle. The vehicle
le ve l is thereby alw ays maintained at the driving
le ve l,re ga rdless of vehicle load. Driving dynamics
re main unaf fected. The height dif fere nce
between the sides of theve hicle may be up to
0.4 in (1 cm). Electronic le
vel control is not engine-dependent
and is only operational when the ignition is
switched on. The electronic le vel control com‐
pressor works audibl y.
% If
th e compressor works cons tantly or starts
up se veral times per minute, elect ronic le vel
control is malfunctioning.
Depending on theve hicle equipment, electronic
le ve l control switches between manual and auto‐
matic mode depending on either theve hicle
speed or the position of the parking brake.
If electronic le vel control switches depending on
ve hicle speed, manual operation is automatically
activated when theve hicle is stationar y.Yo u may
ra ise or lo werth eve hicle le vel. If you subse‐
qu ently drive faster than 6 mph (10 km/h), man‐
ual mode is automatically deactivated and auto‐
matic mode sets theve hicle le vel.
If elect ronic le vel control switches depending on
th e parking brake position, manual mode is auto‐
matically activated when the parking brake is
applied. You may raise or lo werth eve hicle le vel
to load and unload. If youre lease the parking
brake, manual mode is automatically deactivated
and automatic mode sets the driving le vel.
When working on theve hicle or changing a
wheel, you can deactivate electronic le vel control
(/ page 123).
If electronic le vel control is malfunctioning or the
ve hicle le vel is too high or too lo w,an audible sig‐
nal sounds.
The driving and steering characteristics of the
ve hicle will be noticeably dif fere nt. Electronic
le ve l control adjusts theve hicle le velto the nor‐
mal le vel as soon as possible. Continue driving
carefully until the audible signal stops. Only then
is theve hicle at normal le vel.
Au tomatic mode and electronic le vel control
automatically switch on again torestore theve hi‐
cle le vel, depending on the option selected:
R when the parking brake is released
R from speeds of appr oximately 6 mph
(10 km/h)
If th e electronic le vel control compressor thre at‐
ens to ov erheat, e.g. due torepeated raising or
lo we ring wi thin a short period, elect ronic le vel
control is deactivated. You can raise or lo werthe
ve hicle le vel again af ter appro ximately
one minu te. 12 2
Driving and pa rking
Page 147 of 354

Ra
ising and lo weringtheve hicle le vel Using
there mo tecontrol
The remo tecontrol is loca ted in a holder on the
B‑pillar on the driver's side. Remo vethere mo te
control from the holder before use. Elect
ronic le vel control per form s a self-check reg‐
ularly when it is activated and while in use. Indi‐
cator lamp 1onthere mo tecontrol lights up for
appr oximately one second when you swit chon
either the ignition or electronic le vel control with
button 4.
There is a malfunction if indicator lamp 1
beha ves in thefo llowing ways:
R the indicator lamp does not light up when you
switch on the ignition or electronic le vel con‐
trol
or
R the indicator lamp does not go out af ter one
second
or
R the indicator lamp then lights up again or
fl ashes
In addition, a warning tone is emitted from the
re mo tecontrol for appro ximately 30 seconds.
The fault that has been de tected can be shown
using the indicator lamps (signaling of fault
codes). #
Park theve hicle, leaving the ignition switched
on. #
Toraise or lo wer the vehicle le vel:press
and hold button 2or3 until theve hicle
le ve lre aches therequ ired height.
The indicator lamp on button 2or3
fl ashes as long as theve hicle le vel is being
ch anged. When theve hicle le vel has been set,
th e indicator lamp on button 2or3 lights
up. #
Tolowe r automatical ly:brie fly press but ton
3 .
Electronic le vel control automatically lo wers
th eve hicle down tothe lo west position.
The indicator lamp on button 3flashes as
long as theve hicle le vel is being changed.
When theve hicle le vel has been set, the indi‐
cator lamp on button 3lights up. #
Tostop the mo vement, brief lypress button
2. #
Toraise or lo werto driving le vel:brief ly
press button 2or3.
Elect ronic le vel control automatically raises or
lo we rstheve hicle todriving le vel.
The indicator lamp on button 2or3
fl ashes as long as theve hicle le vel is being
ch anged. When theve hicle le vel has been set,
th e indicator lamp on button 2or3 lights
up. #
Tostop the mo vement, brief lypress theot her
button. #
Tosave the set vehicle le vel:set the
re qu ired vehicle le vel. #
Press and hold button 5or6 until you hear
a to ne.
The vehicle le vel set has been sa ved on cor re‐
sponding button 5or6. #
Tocall up the sa vedve hicle le vel:briefly
press button 5or6.
Electronic le vel control automatically raises or
lo we rstheve hicle tothe sa ved driving le vel.
The indicator lamp on button 5or6
fl ashes as long as theve hicle le vel is being
ch anged. When theve hicle le vel has been set,
th e indicator lamp on button 5or6 lights
up. #
Tostop the mo vement, brief lypress button
2 or3. #
Toswitch on automaticall y:drive at over
6.2 mph (10 km/h) or release the parking
brake.
Elect ronic le vel control controls theve hicle
le ve l automaticall y. #
Tostop the mo vement, brief lypress button
2 or3.
Switching electronic le vel control off/on #
Toswitch electronic le vel control off:
press button 4.
The indicator lamp on button 4lights up. Driving and parking
12 3
Page 148 of 354

#
Toswitch electronic le vel control on
again: press button 4again.
The indicator lamp on button 4goes out.
Using the but ton in the control panel #
Park theve hicle, leaving the ignition switched
on. #
Tolowe r automatical ly:brie fly press the
lo we r section of switch 2.
Electronic le vel control automatically lo wers
th eve hicle. #
Tostop the mo vement, brief lypress the upper
section of switch 1. #
Toraise todriving le vel:briefly press the
upper section of swit ch1.
Electronic le vel control automatically raises
th eve hicle tothe driving le vel. #
Tostop the mo vement, brief lypress the lo wer
section of switch 2. #
Toswitch on automaticall y:drive at over
6.2 mph (10 km/h) or release the parking
brake.
Elect ronic le vel control controls theve hicle
le ve l automaticall y. Using electronic le
vel control forch arging
with air in an emer gency Only
forve hicles with valves for electronic le vel
control emergency charging. If electronic le velcontrol is malfunctioning and
theve hicle is lean‐
ing, you can raise or lo werth eve hicle bycon‐
necting an extern al compressed-air source toone
of the emer gency valves (tire valves). If elect ronic
le ve l control is deactivated, you can drive on
carefully tothe nearest qualified specialist work‐
shop and ha vethe malfunction remedied.
* NO
TEDama gedue topressure being too
high If
th e pressure in the air suspension bello ws
is too high, the compressed-air lines or the air
suspension bello wsmay be dama ged. #
Ensure you obse rveth e maximum per‐
missible operating pressure of 600 kPa
(6 bar/87 psi). #
Apply the parking brake. #
Vehicles with automatic transmission:
shift the transmission toposition 005D. #
Switch off electronic le vel control
(/ page 123). #
Switch off the engine and open the hood
(/ page 202). #
Unscr ewtheva lve cap of the cor responding
va lve. #
Connect theex tern al compressed-air source. #
Raise or lo werth eve hicle le velby charging or
re leasing compressed air until the driving
le ve l has been reached and theve hicle is in a
horizontal position. While doing so, ensure
yo u obse rveth e maximum permissible oper‐
ating pressure of 600 kPa (6 bar/87 psi). #
Disconnect theex tern al compressed-air
source. #
Tighten theva lve caps on theva lves. #
Close the hood (/ page 202). #
Drive on carefully tothe nearest qualified
specialist workshop. 124
Driving and pa rking
Page 149 of 354

Problems with
the electronic le vel control Problem
Possible causes/consequences and 0050 0050Solutions
Yo u cannot raise or lo wer
th eve hicle le vel when
st ationar y. The compressor is in danger of
overheating. Af terre peatedly raising and
lo we ring theve hicle, electronic le vel control (play pr otection) is deactiva‐
te d. #
Tryto set theve hicle le vel manually again af ter appro ximately
one minute.
Electri c level control has been deactivated due tounde rvoltage. The bat‐
te ry may not be charging.
Handling and ride comfort may suf fer. #
Start the engine. #
Consult a qualified specialist workshop as soon as possible. Re
fueling Re
fueling theve hicle &
WARNING Risk offire or explosion from
fuel
Fu els are highly flammable. #
Fire, open flames, smoking and creation
of spar ksmust be avoided. #
Swit choff the ignition and, if available,
th est ationary heater, before and while
re fueling theve hicle. &
WARNING Risk of inju ryfrom fuels
Fu els are poisonous and hazardous to your
health. #
Do not swallow fuel or let it come into
con tact wi thskin, eyes or clo thing. #
Do not inhale fuel vapor. #
Keep children away from fuel. #
Keep doors and windo wsclosed du ring
th ere fueling process.
If yo u or other people come into contact with
fuel, obser vethefo llowing: #
Immediately rinse fuel off your skin with
soap and water. #
If fuel comes into contact with your
ey es, immediately rinse them thor‐
oughly with clean water.Seek medical
attention immediately. #
Ifyo u swallow fuel, seek medical atten‐
tion immediatel y.Do not induce vomit‐
ing. #
Change immediately out of clo thing that
has come into con tact wi thfuel. &
WARNING Risk offire or explosion from
electros tatic charge
Electros tatic charge can crea tespar ksand
th ereby ignite fuel vapors. #
Before opening the fuel filler cap or tak‐
ing hold of the pump nozzle, touch the
me tallic body of theve hicle.
This dischar ges any electros tatic charge
th at may ha vebuilt up. #
Do not get into theve hicle again during
th ere fueling process.
Otherwise, electros tatic charge could
build up again. &
WARNING Risk offire from fuel mixture
Ve hicles with a diesel engine:
If yo u mix diesel fuel with gasoline, theflash
point of the fuel mixture is lo werth an that of
pure diesel fuel.
While the engine is running, component pa rts
in theex haust sy stem may overheat without
wa rning. #
Neverre fuel using gasoline. #
Never mix gasoline with diesel fuel. Driving and parking
12 5
Page 150 of 354

*
NO
TEDo not use diesel torefuel vehicles
with a gasoline engine. If
yo u acciden tally refuel with the wrong fuel:
R Do not switch the ignition on. Otherwise
fuel can enter the engine.
Even small amounts of the wrong fuel
could result in damage tothe fuel sy stem
and the engine. The repair costs are high. #
Consult a qualified specialist workshop. #
Have the fuel tank and fuel lines drained
comple tely. *
NO
TEDo not use gasoline torefuel vehi‐
cles with a diesel engine. If
yo u acciden tally refuel with the wrong fuel:
R Do not switch the ignition on. Otherwise,
fuel can enter the fuel sy stem.
Even small amounts of the wrong fuel
could result in damage tothe fuel sy stem
and the engine. The repair costs are high. #
Consult a qualified specialist workshop. #
Have the fuel tank and fuel lines drained
comple tely. *
NO
TEDama getothe fuel sy stem caused
by ove rfilled fuel tanks. #
Only fill th e fuel tank until the pump
nozzle switches off. *
NO
TEFuel may spr ayout when you
re mo vethe fuel pump nozzle. #
Only fill th e fuel tank until the pump
nozzle switches off. *
NO
TEDama getopainted sur faces due to
fuel #
Do not spill any fuel on painted sur fa‐
ces. +
ENVI
RONMENTAL NOTEEnvironmental
damage due toimproper handling of fuel If fuels are handled improperly,
they pose a
danger topersons and the environment. #
Do not allow fuels torun into the sew‐
age sy stem, the sur face wate rs,the
ground water or into the ground. Re
quirements:
R The vehicle is unloc ked.
R The auxiliary heating is deactivated.
R The ignition is switched off
R The front left-hand door is open.
% Do not
get ba ckinto theve hicle during the
re fueling process. Otherwise, electros tatic
ch arge could build up again.
Obser vethe no tes on operating fluids
(/ page 263). 1
Fuelfiller flap
2 Fuelfiller cap
% The fuel
filler flap is beside the front left-hand
door when vie wed in the direction of tr avel.
The position of the fuel filler cap 00D4is also
shown in the Instrument Displa y.The ar row
on thefilling pump specifies the side of the
ve hicle. #
Open fuel filler flap 1. #
Turn fuel filler cap 2coun ter-clockwise and
re mo veit. #
Close all vehicle doors topreve nt fuel vapors
from entering theve hicle interior. #
Comple tely slide thefiller neck of the pump
nozzle into theta nk, hook in place and refuel. #
Fillthe fuel tank only until the pump nozzle
switches off. #
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. 12 6
Driving and pa rking
Page 151 of 354

%
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
incor rect fueling pr otector: you can also
re fuel 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. 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 Driving and parking
127
Page 152 of 354

R
Diluting DEF #
Only use DEF in acco rdance with ISO
22 241. #
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.
Calling up the DEF range and DEF le velga uge
On-board computer:
4 Service #
Select DEFand confirm.
The DEF fill le vel and the DEF range appear. Instrument Display wi
thcolor display
1 DEF range
2 DEF fill le vel Instrument Display with black
and white dis‐
play
1 DEF fill le vel
2 DEF range 12 8
Driving and pa rking