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272 Con
trols
Instrum entclust er
Th eco olan t tem peratu regauge is inthe in-
strum entcl us ter on the le ft-h an d side.
Th eco olan t te mperatur emay riseto
12 0° C und ernormal operati ngconditions
an difth eco nc entr ation of antifr ee ze /
co rros ion inh ibitor is correct.
Th ered band inthe re vco unt erind icat es
the engi ne’s ove rrev ving rang e.Th e speed
is restr icte dto prote cttheengine when
the red band is rea ched.
! Donot dri veintheov errev ving range. Doing
so will dam ageth e engine. Th
eou tside temper ature disp lay is lo cated
in the lower left-h an dco rner of the instru-
me ntclus ter. There isashort del aybefore
a ch an ge inthe outsid etem per atur e is dis-
played.
Th e fuel gaug eisinth einst ru me ntclus ter
on th eleft-h an d side. Theye llow res erve
fu el segment displ aylights upif th efuel
level drops into the reserve range. Coolant temperat
ure ga uge Rev counter Outside tem
perature dis play G
Risk of accident When
thetem perature display ed isjust
ab ovefreezin gpo int, the roa dsu rface may
be icy, espe cially in wooded areas or on
br idge s.The vehicle cou ldskid if you fail
to ad apty ourd rivi ng styl e. You should
therefo realwa ysada ptyou r driving style
and spe edto suit the weather condi tions. Fuel ga
uge 216_R
E_2006-12a.book Seit e272 Montag, 2. Oktob er2006 12:06 12
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341
Con
trols
Auxiliary heating /ventila tion*
The auxiliar yheating heatsor ventilat es
the vehicle inter ior until the te mperature
yo u have setus ing th ete mp eratu recontrol
is reac hed.
i Youca nnot useth e au xiliary ventila tion to
co oltheve hicle inte rior toa lo wertemp erature
th an theo utside temp erature.
Yo uc an use COMA ND an dth ere mo tecon-
trol to set up to three switch-o ntime s,one
of wh ichmay be selected at anyone time
( = page 214).
You can switch theauxiliary heat ingo nand
of fs traight away using the button on the
centr econsol e ( =
page 341) or the remo te
contr ol (
=page 342). If yo
uha ve switched ontheau xiliar y heat-
in g usin gthe re motecontr olor the button
on thece ntre consol e, it willsw itch off
au tom atically after 50 minutes .Yo u can
ha ve thistimech an ged. Todo this, vis it
aq ualified specialistwor ksho p,e.g. a
Mercedes -Ben zSe rvice Ce ntre.
i Thetank mu st be at least full tothe reserve
fuel lev elto ensure thatth ea uxiliary heating
fu nc tions.
i The auxiliary heating orventilat iona utoma t-
ically adj usts to ch anges in thetemp erature and
th eweat herco ndit ions . For this reason, the au x-
iliary heating could sw itch over from ventilation
mode toheating mode or from heating modeto
ve ntilat ion mode.
6 Itis prefer able to set the airc ondition-
in g to autom atic mo de ( =
page 338).
i The auxiliary heating or ventilat ioncan also
be switchedon manuall y. Ho wever , optimum
co mf ort cano nly beobt ained when the au tomat-
ic air conditioning isin au tomatic mode. 6
Set the inte rior temperatu reto the de-
si red val ue (
=pa ge 338).
Th eau xiliary heatingo rventila tion
au tom atically adjus tsto the set tem-
peratur e.
i It is best tosetth etemp erature to22 °C.
1 Toswitch theau xiliary heatingon or off Auxiliar
yhe ati ng /ventilation* G
Risk offire and poi soning Ex
haus tfume sar ep rodu cedwh en the aux-
ilia ry heating is in operatio n.Yo ush ou ld
therefor eswitch offth eau xiliary heating in
con fine dspac eswith out an extract ion sys-
te m, e.g. agarage.
Au xiliary heating operation isproh ibited at
fi lling stati onsor wh en your vehicle isbe ing
re fuel led. Yo umu sttherefore switch offthe
au xiliary heat ing at filling stations. Be
fore sw itch ing on Button
onthe centre console
P83.70-4941-31 216_R
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345
Con
trols
Hea ter boost ersystem (vehicl eswith auxiliary heating*)
Th ehe ater booster syste mhelps the en-
gine to re ach its operati ngtem pera ture
mo re qui cklyafter it is st arted, andhe lps
the interior to warm upmo requickly.
Th ehe ater booster syste mswitche sits elf
on if:
! theou tside te mperat ureis belo w8°C
! the coolan t te mperatu reisbelow
70 °C
i Thetank mu stbe filled uptothe reserve fuel
le ve l at least toensure theheater boos tersy s-
tem wo rks. 1
Toswitch th ehe ater bo oster syste mon
or off
2 Indic ator la mp
You can also switch on the heate rbooster
syst emmanual lyto crea te a mor ecomfort-
ab letemper ature, e. g.at outsidet em pera-
ture sab ove9°C.
6 To switc hon or off: makesure th e en-
gine isrunning.
6 Push rocke rswi tch1 brief lyup or
do wn. He
ater booster syst em
(v ehicles with au xiliary heati ng*) G
Risk offire and poi soning Ex
haus tfum esare pro ducedwhen the heat-
er boost ersys temi sin op eration. Sw itch off
the heater booster system theref ore incon-
fi ne dsp aces without an extraction system,
e. g. in garages.
Op eratio n of the heater booster systemis
pr ohib itedat filling stat ions orwhen yourve-
hicle isbe ing refuelled. Youmu sttherefore
sw itch off the engine atfillin gs tati ons. In
dica tor la mp Hea
terboo ster
sy stem On sw
itche don Off sw
itche doff P83.70-4943-31216_R
E_2006-12a.book Seit e345 Montag, 2. Oktob er2006 12:06 12