Page 105 of 416

Au
tomatically controlling the climate control
in the rear comp artment Re
quirements:
R Rear-compartment climate control has been
swit ched on (/ page102).
In automatic mode, thete mp erature, air flow and
air distribution are regulated and kept cons tant. #
Press the button.
#
Press the 0058 button.
% Even if
the front-compartment sy stem is in
automatic mode, there ar-compartment sys‐
te m can exit automatic mode if you adjust
th e blo wer on there ar-compartment menu.
% If
th e air is cooled and the driver's, front
passenger or sliding door is opened, there ar
compartment air conditioning sy stem blo wer
will be turned down af ter around 15minutes.
When all doors ha vebeen closed again, the
blo wer will be reset tothe pr evious setting
af te r around one minute. Information on
the air distribution settings The symbols on
the display indicate theve nts
th ro ugh which the air is being directed.
Dual-zone automatic climate cont rol
R 0087 Defros ter and center vents
R 008F Allvents
R 009C Center vents
R 009F Center and foot we llve nts
3-zone au tomatic clima tecontrol
R 0061 Defros terve nts
R 0087 Defros ter and center vents
R 008F Allvents
R 0086 Defros ter and foot we llve nts
R 009C Center vents
R 009F Center and foot we llve nts
R 009B Footwe llve nts Setting the air distribution
Re
quirements:
R The climate control sy stem is switched on. #
Press the 008F button repeatedly until the
desired air distribution appears in the air con‐
ditioning sy stem displa y. Switching
the synchronization function on
and off Re
quirements:
R The climate control sy stem has been
switched on (/ page101).
The syn chronization function controls the climate
cont rol function centrally. The settings forthe
te mp erature and air flow inthe front zone are
automatically adop tedfo rth ere ar zone. #
Press the 0 button.
% If
th ere ar-compartment climate control has
been swit ched off, you can swit chit on auto‐
matically bypressing the0 button. Clearing condensation from
the windo ws Misting on
the inside of windo ws #
Press the 0064 button.
When the windshield defros ter is switched on,
th ete mp erature and air flow cannot be adjus‐
te d. #
Invehicles with a heating sy stem and a man‐
ual air-conditioning sy stem, also close the
side and center air vent (/ page 104) as well
as the air vents forth ere ar compartment
(/ page 105). #
Vehicles with dual-zone or 3-zone auto‐
matic climate control: pressthe005A but‐
to n and, if necessa ry, use the008F button to
direct the air onto the windshield 0061. #
Incre asethe air flow as necessary and close
all air vents (/ page 104). #
Ifth e windo wsremain fogged up: press
th e0064 button.
When the windshield defros ter is switched on,
th ete mp erature and air flow cannot be adjus‐
te d.
0064 or no symbol will appear on the climate
cont rol sy stem displa y. #
Vehicles with a windshield heater: press
th eÎ button. Climate control
103
Page 106 of 416

#
Close the center air vent (/ page 104) and
air vents forth e headroom (/ page105) and
re ar compartment (/ page105).
Misting on the outside of windo ws #
Switch on the windshield wiper (/ page 95).Switching air-recirculation mode on or off
#
Press the0073 button.
The interior air is recirculated.
The ai r-re circulation mode switches off au tomati‐
cally.
% When air-recirculation mode is switched on,
th e windo wsmay fog up more quickl y.Switch
on ai r-re circulation mode only briefly.
Air-recirculation mode will au tomatical lyswitch
on in thefo llowing cases:
R Athigh outside temp eratures
R While theve hicle is driving thro ugh a tunnel
(vehicles with 3-zone automatic climate con‐
trol and navigation only)
R When the windshield wipers are switched on
(/ page 95)
The indicator lamp on the0073 button will not
light up in this case. Af ter a maximum of
30 minutes, outside air is automatically intro‐
duced again. Switching
the windshield heater on and off %
In
theeve nt of high outside temp eratures,
th e windshield heater may not switch on. #
Press theÎ button.
If th e indicator lamp on the button lights up,
th e windshield heater has switched on.
% The windshield heater switches off automati‐
cally af ter a few minutes.
% If
th e battery voltage is too lo w,it may not be
possible toswitch the windshield heater on.
If th e battery voltage becomes too low while
th e windshield heater is in operation, the
windshield heater will swit choff automati‐
cally. Switching
there ar window heater on or off #
Press the006C button.
If th e indicator lamp lights up, there ar win‐
dow heater is swit ched on. Operating air
vents Ad
justing the front-compartment air vents &
WARNING ‑ Danger of bu rns or frostbite
due tobeing too close tothe air vents
Ve ry hot or very cold air can flow from the air
ve nts.
This could result in burns or frostbite in the
immediate vicinity of the air vents. #
Makesure that all vehicle occupants
alw ays maintain a suf ficient dis tance to
th e air vents. #
If necessa ry, direct the air flow to
ano ther area of theve hicle interior. #
Toopen or close: hold center2 of air
ve nt 1 and turn it tothe left or right as far
as it will go. #
Toset the air direction: hold center2 of
air vent 1 and swivel it up wards, down‐
wa rds, to the left or totheright. 104
Climate cont rol
Page 107 of 416

#
Toopen or close: turnthe adjustment
wheels 1onthe high-po wer air vents tothe
left or right as far as they will go.
% Cooled air will
flow out of the high-po wer air
ve nts. Heating will not be possible. Open the
high-po wer air vents only in summer du ring
cooling mode and keep them closed in win‐
te r. Ad
justing air vents in thero of air duct In
vehicles with a rear compartment air condition‐
ing sy stem, adjus table air vents ha vebeen inte‐
grated in thero of air duct. #
Toadjust the airflo w:if necessar y,open or
close the air flaps in air vents 1. #
Toadjust the air distribution: turn airvents
1 tothere qu ired position. Information about air
vents in there ar com‐
partment &
WARNING ‑ Danger of bu rns or frostbite
due tobeing too close tothe air vents
Ve ry hot or very cold air can flow from the air
ve nts.
This could result in burns or frostbite in the
immediate vicinity of the air vents. #
Makesure that all vehicle occupants
alw ays maintain a suf ficient dis tance to
th e air vents. #
If necessa ry, direct the air flow to
ano ther area of theve hicle interior. Depending on
theve hicle equipment, there will
be an air duct or a heater with additional air vents
in there ar compartment foot we ll on the left-hand
side 1. No objects may be placed there. Occu‐
pants must maintain a suf ficient dis tance due to
th ewa rm airflow and air intake. Au
xiliary heating Note
s about auxiliary heating &
DANG ER Risk of fata l injury due topoi‐
sonous exhaust gases
If th eta ilpipe is bloc ked or suf ficient ventila‐
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter theve hi‐
cle. This is the case in enclosed spaces or if
th eve hicle getsst uck in sn ow,fo rex ample. #
Always switch thest ationary heater off
in enclosed spaces without an air
ex traction sy stems, e.g. in garage s. #
Keep theta ilpipe and the area around
th eve hicle free from snow when the
engine or thest ationary heater are run‐
ning. #
Open a window on the windward side of
th eve hicle toensure an adequate sup‐
ply of fresh air. &
WARNING Risk offire due tohot station‐
ary heater components
When thest ationary heater is swit ched on,
parts of theve hicle can become very hot, e.g.
th est ationary heater exhaust sy stem. Climate cont
rol105
Page 108 of 416

Flammable materials such as lea
ves, grass or
twigs may ignite if they come into contact
wi th:
R hot parts of thest ationary heater exhaust
sy stem
R theex haust gas itself
There is a risk of fire. #
When thest ationary heater is swit ched
on, make sure that:
R Hot vehicle parts do not come into
contact with flammable materials.
R The exhaust gas can flow out of the
st ationary heater exhaust pipe
unhindered.
R The exhaust gas does not come into
contact with flammable materials. *
NO
TEDama getothe auxiliary heating If
th e auxiliary heating is not used for an
ex tended pe riod of time, it can be damaged. #
Switch the auxiliary heating on for
around ten minu tes at least once a
month. *
NO
TEDama getothe auxiliary heating
due toove rheating If
th e hot air flow is bloc ked, the auxiliary
heating can overheat and switch off. #
Do not block the hot air flow. %
Ve
hicles with modified fuel displa ys:if an
ex tern ally operated consumer is connec ted
via the cable forth e auxiliary heater, this is
not take n into conside ration on the "range
re maining" display of the on-board computer.
In this case, obser vethe fuel displa y.The fuel
display pr ovides the cur rent le vel.
If yo u are transpo rting hazardous materials, com‐
ply with there leva nt sa fety regulations. Alw ays
place objects at a suf ficient dis tance from the
outlet opening of the auxiliary heating.
Au xilia ryheating works independently of the
engine and complements the climate cont rol sys‐
te m in theve hicle. Auxilia ryheating heats the air
inside theve hicle tothe set temp erature. Hot-water auxiliary heater
Fu
nction of the hot- water auxiliary hea ter
The hot-water auxiliary heater complements your
ve hicle's climate contro l system, and has a
heater boos ter,auxiliary heating and auxiliary
ve ntilation function. In addition, the auxiliary
heating sy stem heats the engine coolant topro‐
te ct the engine and sa vefuel during thewa rming-
up phase. The auxiliary heating heats the air
inside theve hicle tothe set temp erature. It is not
dependent on the heat output of theru nning
engine. The auxilia ryheating is operated directly
using theve hicle's fuel. Forth is reason, the fuel
ta nk must ha vebeen filled abo vethere ser vefuel
le ve l so that the auxiliary heating can work. The
auxilia ryheating automatically adapts its operat‐
ing mode tothe outside temp erature and
we ather. It is therefore possible that the auxiliary
heating may switch from ventilation toheating
mode or from heating toventilation mode. When
th e engine is running, auxilia ryventilation is not
acti ve.Au xilia ryheating automatically switches
itself off af ter a maximum of 50 minutes. Yo u
cannot use the "auxiliary ventilation" ope rating
mode tocool the air inside theve hicle tobelow
th e outside temp erature. Auxilia ryheating helps
to heat up theve hicle while the engine is running
and at low outside temp eratures.
Operating the hot-wa ter auxiliary heater draws
po we r from theve hicle batter y.Therefore, drive a
re asonably long dis tance af ter heating or ventilat‐
ing theve hicle twice in succession at most.
Au xilia ryheating can be activated only at temp er‐
atures below 40 °F (4.5 °C).
Switching the hot- water auxiliary hea ter on
and off with the button
Re quirements:
R The fuel tank is filled abo vethere ser veleve l.
Switching auxiliary heating on and off #
Toswitch on: pressthe003B button. #
Toswitch off: pressthe003B button.
Ac tivating the speci fied temp erature #
Swit chon the ignition. #
Toswitch on: pressthe003B button. #
Toswitch off: pressthe003B button. #
Set thete mp erature using the0082 button. #
Press the003B button.
The red or blue indicator lamp on the003B
button goes on or off. 106
Climate cont rol
Page 109 of 416

Colors of
the indicator lamp:
R Blue: stationary ventilation has been
switched on.
R Red:thest ationary heater has been swit ched
on.
R Yello w: the departure time has been pre-
selected.
The stationary heater or ventilation switches off
af te r a maximum of 50 minutes.
Switching heater boost er mode on and off#
Swit chon the ignition. #
Toswitch on: pressthe003B button. #
Toswitch off: pressthe003B button.
Heater boos ter mode will be switched on at
an outside temp erature of less than 32 °F
(0 °C) when necessar y.
% Heater boo
ster mode is available only for
ve hicles with hot-water auxiliary heaters.
Ad justing the hot-water auxiliary hea ter with
the on-board co mputer
Re quirements:
R The fuel tank is filled abo vethere ser vefuel
le ve l.
R The ignition is switched on.
On-board computer: 4 Settings 5
Heating
Setting the switch-on time #
Select Settings. #
Select the desired departure time.
Ac tivating the departure time #
Activate the departure time byticking the
box.
% Ensure
that A, B and C ea chcor respond to a
programmed departure time.
% The programmed time
remains set only until
th e next time the engine is star ted.
Selecting prog rammed time #
Set therequ ired programmed time A,B or C.
% The
requ ired prog rammed time A,B or C will
appear only if the box toactivate the depar‐
ture time is tic ked. #
Select there qu ired prog rammed time by
swiping left or right, e.g. A,B or C. Clima
tecontrol 107
Page 110 of 416

Problems with hot
water auxiliary heating Problem
Possible causes/consequences and 0050 0050Solutions
FA IL00A3 Signal transmission between transmitter and
vehicle is malfunctioning. #
Change your position in relation totheve hicle, moving closer if nec‐
essar y.
FA IL The
star ter battery is not suf ficiently charge d. #
Charge thest ar ter batter y.
The fuel tank is not filled up tothere ser veleve l. #
Refuel at the nearest gasst ation.
FA IL0099 Au
xilia ryheating is malfunctioning. #
Have the auxiliary heating checked at a qualified specialist work‐
shop. Operating cargo compartment
ventilation If
yo ur vehicle is equipped with a roof ventilator,
yo u can admit fresh air tothe cargo compart‐
ment, or extract air from it as well. #
Swit chon the ignition. #
Toswitch on and extract: press switch 1
at theto p.
The roof ventilator remo ves used air from the
cargo compa rtment. #
Toswitch on and admit fresh air: press
switch 2atthe bottom.
The roof ventilator feeds fresh air into the
cargo compa rtment. #
Toswitch off: setthe switch tothe center
position. 108
Climate cont rol
Page 111 of 416

Driving
Swit
ching on po wer supply or ignition with
the start/s top button &
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. &
DANG ER Risk of death caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and leads topoisoning. #
Never lea vethe engine or, if present,
th e auxiliary heating running in an
enclosed space wi thout suf ficient venti‐
lation. &
WARNING Risk offire due toflammable
material in the engine compartment or
th eex haust sy stem
Flammable materials brought in byeither ani‐
mals or environmen tal influences may ignite if
th ey come into contact wi thhot parts of the
engine or exhaust sy stem. #
Therefore, check regularly that there are
no flammable materials in the engine
compartment or on theex haust sy stem. Re
quirements:
R The key is in de tection range of the antenna
(/ page 46) and theke y bat tery is not dis‐
ch arge d. #
Toswitch on the po wer suppl y:press but‐
to n1 once.
Yo u can now activate the windshield wipers,
fo rex ample.
The po wer supp lyis switched off again when one
of thefo llowing conditions is me t:
R The driver's door is open.
R You press button 1twice. #
Toswitch on the ignition: press button 1
twice.
The indicator lamps appear in the instrument
clus ter.
The ignition is switched off again when one of the
fo llowing conditions is me t:
R You do not start theve hicle within
15 minutes.
R You press button 1once. Driving and parking
109
Page 112 of 416

St
arting the engine St
arting theve hicle with thest art/s top but‐
ton &
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 of theve hicle and be hit by
oncoming traf fic.
R operate ve hicle equipment and become
trapped, forex ample.
In addition, children could also set theve hicle
in motion, forex ample, by:
R releasing the parking brake.
R shifting the automatic transmission out of
park position 005D.
R starting the engine #
Never lea vechildren and animals unat‐
te nded in theve hicle. #
When leaving theve hicle, alw aysta ke
th e SmartK eywith you and lock the
ve hicle. #
Keep the SmartK eyout of there ach of
ch ildren. Re
quirements:
R The key is in de tection range of the antenna
(/ page 46) and theke y bat tery is not dis‐
ch arge d. #
Vehicles with automatic transmission:
shift the transmission toposition 005Dor005C. #
Depress the brake pedal and press button 1
once. #
Ifth eve hicle does not star t:switch off unnec‐
essary consumers and press button 1once. #
Ifth eve hicle still does not start and the
Place the Key in the Marked Space See Oper-
ator's Manual display message appears in the
multifunction display: start theve hicle in
emergency operation mode.
St arting theve hicle in emer gency operation
mode &
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. If
th eve hicle does not start and thePlace Key in
Marked Space See Operator's Manual display
message appears in the multifunction displa y,
yo u can start theve hicle in emergency operation
mode. 11 0
Driving and pa rking