Page 129 of 416

ta
ining the speed is dependent on thero ad sur‐
fa ce conditions and the downhill gradient and
cann ottherefore be guaranteed in all situations.
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.
DSR automatically cont rols in thefo llowing situa‐
tions:
R Ifth eve hicle is stationar y,or its speed is less
th an 2 mph (4 km/h) , the speed is set to
2 mp h (4 km/h) or it is set tothe minimum
speed forth ere spective gear range.
R Ifyo u drive fasterthan 11mp h (18 km/h) off-
ro ad, DSR swit ches tostandby mode. DSR
re mains activated, but does not brake auto‐
matically.
R Ifyo u drive downhill slo werth an 11mph
(18 km/h), DSR sets the speed tothe pr evi‐
ously set speed.
R Ifyo u drive faster than 28 mph (45 km/h),
DSR switches off automaticall y.Ac
tivating/deactivating DSR Ac
tivating DSR Yo
u can activate DSR when theve hicle is station‐
ary or moving. #
Press the upper section of switch 1.#
Brake or accelerate theve hicle tothe desired
speed between 2 mph (4 km/h) and 11mph
(18 km/h). #
Release the brake or accelera tor pedal.
The cur rent speed is stored. When stationar y,
2 mp h (4 km/h) or the minimum possible
speed for each gear range is stored. DSR maintains
thestored speed on the downhill
gradient and brakes automaticall y.
When DSR is activated and theve hicle pulls
aw ay, accelerates or brakes on an incline, the
speed set cor responds tothe speed at which the
accelerator or brake pedal is released or the
rock er switch is pressed during DSR regulation.
This is only the case if you are not driving faster
th an 11mp h (18 km/h).
DSR status display in the on-board computer
R DSR is activated:
- DSR andthe set speed appear in thest a‐
tus area of the on-board computer.
R DSR is activated, but is not inter
vening:
- You are driving between 11mph
(18 km/h) and 28 mph (45 km/h).
- DSR andthe speed 11mp h (18 km/h)
appear in thest atus area of the on-board
computer.
DSR is in standby mode.
R DSR is inactive:
- You are exceeding 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 tobetween 2 mph
(4 km/h) and, depending on thege ar range, up to
11 mp h (18 km/h) using the brake and accelera‐
to r pedals or thero ck er switch on thesteering
wheel. Driving and parking
127
Page 130 of 416

#
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 You drive fasterthan 28 mph (4 5 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 theve hicle is
being lo wered. &
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.
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. 12 8
Driving and pa rking
Page 131 of 416

#
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 129). 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. Ra
ising and lo weringtheve hicle le vel Cer
tain special equipment enables other opera‐
tion options:
R Ambulance: raising theve hicle le vel abo ve
th e driving le vel (cen ter position) is not possi‐
ble. Only the lo west position and the driving
le ve l can be set.
R Speed signal: in order tooperate electronic
le ve l control, the parking brake must not be
applied. Elect ronic le vel control can be oper‐
ated manually up to6.2 mph (1 0 km/h). If
th is speed is exceeded, driving le vel will be
set automaticall y.
R Cas ter module, 30 min: electronic le vel con‐
trol can be opera ted up to30 min af ter
switching off the ignition.
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. Driving and parking
12 9
Page 132 of 416

Electronic le
vel control starts automatically if the
ignition is switched on. Operation is only possible
af te rth e parking brake has been applied.
Elect ronic le vel control per form s a self-check reg‐
ularly when it is activated and while in use. Indi‐
cator lamp 7onthere mo tecontrol lights up for
about one second when you swit chon the igni‐
tion.
There is a malfunction if indicator lamp 7
beha ves in thefo llowing ways:
R The indicator lamp does not light up when you
switch on the ignition.
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. #
Apply the parking brake. #
Toraise or lo wer the vehicle le vel:press
and hold button 4or5 until theve hicle
le ve lre aches therequ ired height.
The indicator lamp in button 4or5 flashes
as long as theve hicle le vel is being changed.
When theve hicle le vel has been set, the indi‐
cator lamp in button 4or5 lights up. #
Tolowe r automatical ly:brie fly press but ton
5 .
Electronic le vel control automatically lo wers
th eve hicle tothe next lo wer position:
R From the highest position todriving le vel
R From driving le velto the lo west position
The indicator lamp in button 5flashes as
long as theve hicle le vel is being changed. When
theve hicle le vel has been set, the indi‐
cator lamp in button 5lights up.
% By pressing button
4during the mo vement,
th e original position will be reset. #
Toraise automaticall y:briefly press button
4.
Elect ronic le vel control automatically raises
th eve hicle tothe next higher position:
R From the lo west position todriving le vel
R From driving le velto the highest position
The indicator lamp in button 4flashes as
long as theve hicle le vel is being changed.
When theve hicle le vel has been set, the indi‐
cator lamp in button 4lights up.
% By pressing button
5during the mo vement,
th e original position will be reset. #
Toraise or lo wer automatical lyto driving
le ve l (center position): press and hold but‐
to n6.
Electronic le vel control automatically raises or
lo we rstheve hicle todriving le vel. #
Tosave the set vehicle le vel:set the
re qu ired vehicle le vel. #
Press and hold button 1or2 until you hear
a to ne.
The vehicle le vel set has been sa ved on cor re‐
sponding button 1or2. #
Tocall up the sa vedve hicle le vel:briefly
press button 1or2.
Electronic le vel control automatically raises or
lo we rstheve hicle tothe sa ved driving le vel.
The indicator lamp in button 1or2 flashes
as long as theve hicle le vel is being changed.
When theve hicle le vel has been set, the indi‐
cator lamp in button 1or2 lights up.
% Service mode may only be activated or deac‐
tivated at a
qualified specialist workshop by
trained pe rsonnel. In service mode, the air
suspension sy stem is deactivated for mainte‐
nance or fault de tection. #
Toactivate service mode: press button3.
Service mode is active and the indicator lamp
in button 3lights up continuousl y. #
Todeactivate service mode: press button
3.
Service mode is deactivated and the indicator
lamp in button 3goes out. 13 0
Driving and pa rking
Page 133 of 416

#
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 the but ton in the control panel #
Park theve hicle, leaving the ignition switched
on. #
Apply the parking brake. #
Toraise or lo wer the vehicle le vel:press
and hold button 1or2 until theve hicle
le ve lre aches therequ ired height. #
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 tothe next lo wer position:
R From the highest position todriving le vel
R From driving le velto the lo west position
% By pressing button
1during the mo vement,
th e original position will be reset. #
Toraise automaticall y:briefly press the
lo we r section of switch 1.
Electronic le vel control automatically raises
th eve hicle tothe next higher position:
R From the lo west position todriving le vel
R From driving le velto the highest position
% By pressing button
2during the mo vement,
th e original position will be reset. #
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
the but ton in there ar comp artment #
Park theve hicle, leaving the ignition switched
on. #
Apply the parking brake. #
Toraise or lo wer the vehicle le vel:press
and hold button 1or2 until theve hicle
le ve lre aches therequ ired height. #
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 tothe next lo wer position:
R From the highest position todriving le vel
R From driving le velto the lo west position
% By pressing button
1during the mo vement,
th e original position will be reset. #
Toraise automaticall y:briefly press the
lo we r section of switch 1.
Electronic le vel control automatically raises
th eve hicle tothe next higher position:
R From the lo west position todriving le vel
R From driving le velto the highest position
% By pressing button
2during the mo vement,
th e original position will be reset. #
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. Driving and pa
rking 131
Page 134 of 416

Using electronic le
vel control forch arging
with air in an emer gency *
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 900 kPa
(9 bar/130 psi). Only
forve hicles with valves for electronic le vel
control emergency charging. If electronic le vel
control 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 (similar ly as withtire
va lve) . If electronic le vel control is not opera‐
tional, you can drive on carefully tothe nearest
qu alified specialist workshop and ha vethe mal‐
function remedied. #
Apply the parking brake. #
Vehicles with automatic transmission:
shift the transmission toposition 005D. #
Switch off the engine. #
Turn theva lve cap of the cor responding valve
(1 L = left, 2R = right). #
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 900 kPa (9 bar/130 psi). #
Disconnect theex tern al compressed-air
source. #
Tighten theva lve cap on theva lve (1 L =
left, 2R = right). #
Drive on carefully tothe nearest qualified
specialist workshop. 13 2
Driving and pa rking
Page 135 of 416

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 and explosion due
to electros tatic charge
Electros tatic charge can crea tespar ksand
th ereby ignite fuel vapors. #
Before you open the fuel filler cap or
ta ke hold of the pump nozzle, touch the
me tallic vehicle body.
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 can
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
13 3
Page 136 of 416

*
NO
TEDo not use diesel torefuel vehicles
with a gasoline engine If
yo u ha veaccidentally refueled with the
wrong fuel:
R Do not swit ch 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 ha veaccidentally refueled with the
wrong fuel:
R Do not swit ch 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 340). 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. 134
Driving and pa rking