coolant temperature MERCEDES-BENZ M-CLASS SUV 2011 Owners Manual

Instr
umentc luster Displa
ysand controls i
Inst rument cluster: kilometres Function Page
:
Speedometer with seg-
ments
235
;
Multi
function display 236
=
Rev counter 234
?
Coolant temperature 234
A
Fuel gauge
B
Brightness control knob for
the instrument cluster light-
ing: tur nclockwise or anti-
clockwise 30
Instrument clusterAt
ag lance

i
Instrument cluster: miles Fun
ction Page
:
Speedometer with seg-
ments
235
;
Multifunctio
ndisplay 236
=
Rev counter 234
?
Coolant temperature
234 Function Page
A
Fuel gauge
B
Brightness control knob for
the instrument cluster light-
ing: turn clockwise or anti-
clockwise Instrument cluster
31Atag lance

X
To deactivate: press theÌ/Á but-
ton.
The indicator lamp in the Ì/Ábut-
ton goe sout.
i Residual hea tisdeactivated automati-
cally:
R after about 30 minutes
R when the ignition is switched on
R if the batter yvoltage drops
R if the coolant temperatur eistoo low Auxiliar
yheating
Important safety notes G
WARNING
Exhaust fumes are produced when the auxili-
ary heating is in operation. Inhalin gthese
exhaust fumes can be poisonous. You should
therefor eswitch off the auxiliary heating in
confined spaces without an extraction sys-
tem, e.g. agarage. G
WARNING
When operating the auxiliary heating, parts of
the vehicle may become very hot, and highly
inflammable material such as fuels could be
ignited. Operating the auxiliary heating is thus
prohibited at filling stations or when your vehi-
cle is being refuelled .You must therefore
switc hoff the auxiliary heating at filling sta-
tions.
! Operatin gthe auxiliary heating/ ventila-
tion draws on the vehicl ebattery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for alonger
distance.
i Switch on the auxiliary heatin gregularly,
e.g. for about ten minutes ever ymonth.
The auxiliary heatin gheats the air in the vehi-
cle interior to the set temperature without
using the heat of the runnin gengine .The aux-
iliary heating is operated directly usin gthe
vehicle' sfuel. For this reason, the tank con- tent must be at least at reserve fuel level to
ensure that the auxiliary heating functions.
The auxiliary heating/ventilation automati-
cally adjusts to changes in temperature and
weather conditions. For this reason, the aux-
iliary heating could switch from ventilation
mode to heating mode or from heating mode
to ventilation mode.
The auxiliary heating switches off when the
engine is switched off. The auxiliary ventila-
tion switches off when you turn the key to key
position 2.
The auxiliary heating switches off automati-
cally after 30 minutes. This time limit can be
altered. To do this, visit aqualified specialist
workshop, e.g. aMercedes-Benz Service
Centre.
You can notu se the auxiliary ven tilation to
cool the vehicle interior to atemperature
lower than the outside temperature.
Before switching on X
Turn the key to position 2in the ignition
lock.
X Set the temperature.
The auxiliary heating/ventilation can be acti-
vated even when the climate control is being
controlled manually. Optimum comfor tcan
be attained when the system is set to auto-
matic mode. Set the temperature to 22 †.
The auxiliary heating/ventilation can be acti-
vated or deactivated using the remote control
or the button on the centre console.
The on-board computer can be used to spec-
ify up to three departure times, one of which
may be preselected (Y page 250).130
Operating the climate control systemClimate control

Problem Possible causes/consequences and
M Solutions
Vehicles with
apetrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is
amalfunction in the engine electronics or in amechanical
componen tofthe engin emanagement system.
X Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at aqualified specialist
workshop, e.g. aMercedes-Benz Servic eCentre.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it. The coolan
ttempera-
tur ed isplay is showing
more than 120 †. The
coolant warnin glamp
may also be on and a
warning tone may
sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 321). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct
,the radiator fa nmay be faulty. The
coolant is too hot and the engine is no longer being cooled suffi-
ciently.
X At coolant temperatures under 120 †, drive on to the nearest
qualified specialis tworkshop, e.g. to aMercedes-Benz Service
Centre.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. Automa
tict ransmission Important safety notes
G
WARNING
The movement of the pedal smust not be
impaired in any way. Do not keep any objects
in the driver's footwell. Make sure that floor-
mats or carpets are correctly secured and
that there is sufficient clearance for the ped-
als.
Do not place several floormats on top of one
another. G
WARNING
Do not change down for additional engine
braking on aslippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid. This could cause you to lose control of your vehicle and cause an
accident. DIRECT SELECT lever
Overview of transmissio npositions The DIRECT SELECT leve
risonthe right of the
steering column. Automa
tict ran smission
145Drivingand park ing Z

Usefu
linfor mati on
i This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviation sare possible .Please
not ethat your vehicle ma ynot be equipped
with all featur es described. This also
applies to safety-releva ntsystems and
functions.
i Please read the information on qualified
specialist workshops (Y page 24).Important safet
ynotes
You will fin danillustration of th einstrument
cluste rinthe "A taglance "section
(Y page 30). G
WARNING
Only use th eon-bo ardc omputer wh en road
and traffic condition spermit .You would oth-
erwise be distracted and unable to concen-
trate properly on driving, and coul dcause an
accident. G
WARNING
No message swill be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
As aresult, you will not be able to see infor-
mation about your driving conditions, such as
speed, outside temperature, warning and indi-
cator lamps, display messages or system fail-
ures. Drivin gcharacteristic smay be impaired.
Adjust your driving style and vehicle speed
accordingly.
Contact aqualified specialist workshop
immediately. G
WARNING
The on-board computer only records and dis-
plays malfunctions and warnings from certain
systems. For this reason, you should always make sure that your vehicle is safe to use. You
could otherwis
ecause an accident by driving
an unsafe vehicle. G
WARNING
The operating safety of your vehicle could be
impaired if maintenance work is carried out
incorrectly. This could cause you to lose con-
trol of your vehicle and cause an accident.
Moreover, the safety systems may no longer
be able to protect you or others as they are
designed to do.
Always have service work carried out at a
qualified specialis tworkshop. Displays and operation
Coolant tempera
tureg auge
Th ec oolant temperatur egauge is in the
instrument cluster on the right-hand side.
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 120 †.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Rev counter
The red band in the rev counter indicates the
engine's overrevvin grange.
! Do not drive in the overrevving range.
Doing so will damage the engine.
The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
The outside temperature display is in the mul-
tifunction display (Y page 236). G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas 234
Displays and operationOn-board computer and displays

Engine
Display messages Possible causes/consequences and
M Solutions
+
Top
up co
olant See
Owner'
sManual Th
ec oolant leve listoo low.
X Top up th ecoolant ,obser ving the warning note swhen doin gso
( Y page 321).
X If th ecoolant needs toppin gupmoreo ften than usual ,have the
engin ecoolant system checked at aqualified specialist work-
shop. ?
Co
olantS topv ehi‐ cle Switch engine
off Th
ec oolant is to ohot.
Aw arning ton ealso sounds.
X Stop th evehicle immediately, payin gattentio ntoroad and traf-
fic conditions, and switc hoff th eengine.
X Make sure that the air supply to the engine radiato risn ot
blocked, e.g. by frozen slush.
X Wait until the display message disappears befor erestar ting the
engine. Otherwise, there is arisk of engine damage.
X Pay attention to the coolant tempera turedisplay.
X If the temperature increases again, visit aqualified specialist
worksho pimmediately. ? Th
ef an motor is faulty.
X If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialis tworkshop.
X Avoid heav yloads on the engin easyou do so, e.g. drivin gon
mountain roads and stop-start traffi c.266
Display messagesOn-board computer and displays

Problem Possible causes/consequences and
M Solutions
8
The yellow reserve fuel
warnin glamp lights up
while the engine is run-
ning. The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated when the fuel level
drops into the reserve range.
X Refuel at the nearest filling station. ?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the
start of the scale.
The temperature senso
rfor the coolant temperatur egauge is
faulty.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine. Do not continue driving
under any circumstances.
X Apply the electric parking brake.
X Consult aqualified specialist workshop. Warnin
gand indicator lam psin the instru ment cluster
291On-boardcomput er anddisplay s Z

Problem Possible causes/consequences and
M Solutions
?
The red coolant warn-
ing lam
pcomes on
while the engin eisrun-
ning. The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator
may be blocked or the electric engine radiator fan may be mal-
functioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X Observe the additional display messages in the multifunction
display.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page 321).
Observe the warning notes as you do so.
X If you have to top up the coolant frequently, have the engine
cooling system checked.
X Make sure that the air suppl ytot he engin eradiator is not
blocked, e.g. by frozen slush.
X If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialis tworkshop.
X Avoid heav yloads on the engin easyou do so, e.g. driving on
mountain roads and stop-star ttraffic. ?
Th
er ed coolan twarn-
ing lamp comes on
while the engine is run-
ning. Awarning tone
also sounds. The coolant temperature has exceeded 120 †. The airflow to the
engine radiator may be blocked or the coolant level may be too
low.
The engine is not being cooled sufficiently and may be damaged.
X Observe the additional display message sint he multifunc tion
display.
X Stop the vehicle immediately, paying attention to roa dand traf-
fic conditions, and switch off the engine.
X Let the engine and coolant cool down.
X Check the coolant level and top up the coolant (Y page321).
Observe the warning notes as you do so.
X If you have to top up the coolan tfrequently, have th eengine
cooling system checked.
X Make sure that the air supply to the engine radiato risnot
blocked, e.g. by frozen slush.
X If the coolant temperatur eisless than 12 0†,you can con tinue
driving to the neares tqualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-s tart traffic. 292
Warning and indicator lamps in the instrument clusterOn-boar
dcomputer and displays

Examp
le:e ngine oi lcap
X Turn cap :anti-clockwise and remove it.
X Top up the engine oil.
If the oi llev el is at or belo wthe MIN mark
on the dipstick ,top up with
0. 5to1 .0 litres of engine oil.
X Replace cap :on the fille rneck and turn
clockwise.
Make sure that the cap locks into place
securely.
X Check the oil level agai nwith the oil dip-
stick (Y page 320).
Further information on engine oil
(Y page 375). Checking and adding other service
products
Checking the coolant level Only check the coolant level when the vehicle
is on alevel surface and the engine has cooled
down.
X Turn the key to position 2(Y page 139) in
the ignition lock.
On vehicles with KEYLESS-GO, press the
Start/Stop button twic e(Ypage 139).
X Check the coolant temperatur egauge in
the multifunction displ ay.G
WARNING
Th ec ooling system is pressurised. Therefore,
only unscrew the cap once the engin ehas
cooled down. The coolant temperature gauge must display less than 70
†.Otherwi se,you
could be scalded if ho tcoolant escapes. X
Slowl yturn cap :half aturna nti-clock-
wis eand allo wexcess pressure to escape.
X Turn cap :further anti-clockwis eand
remove it.
If the coolant is at the level of markerbar
= in the filler nec kwhen cold ,ther eis
enough coolan tincoolant expansion
tank ;.
If the coolant leve lisapproximately 1.5 cm
above marker bar =in the filler nec kwhen
warm, ther eisenoughcoolant in coolant
expansion tank ;.
X If necessary ,top up with coolant that has
been tested and approved by Mercedes-
Ben z.
X Replace cap :and turn it clockwise as far
as it will go.
For further information on coolant, see
(Y page 377).
Windscreen washer system and head-
lamp cleanin gsystem Th
ew asher fluid reservoir is used for both the
windscreen washe rsystem and the headlamp
cleaning system.
i Components and service products must
be matched. Mercedes-Benz recommends
that you use products teste dand approved
by Mercedes-Be nz.T hey ar elisted in this
Mercedes-Ben zOwner's Manual in the
appropriat esection. Engine compartment
321Maintenance andcare Z

Coolant
Important safety notes The coolan
tisamixture of water and anti-
freeze/corrosio ninhibitor. It performs the
following tasks:
R anti-corrosio nprotection
R antifreeze protection
R raising th eboiling point
i When the vehicle is first delivered, it is fil-
led with acoolant mixtur ethat ensures
adequate antifreeze and corrosion protec-
tion.
! Only add coolant that has been premixed
with the desired antifreeze protection. The
engin ecould otherwise be damaged.
Further information on coolants and on fill-
ing can be found in the Mercedes-Benz
Specifications for Servic eProducts ,MB
Approval 310.1 ,e.g. on the Internet at
http ://bevo.mercedes-benz.com .You can
also consult aMercedes-Benz Service
Centre.
! Alway suseasuitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
If antifreeze/corrosio ninhibitor is present in
the correc tconcentration, the boilin gpoint of
the coolant during operation will be around
13 0†.
The antifreeze/ corrosion inhibitor con centra-
tion in the engine cooling system should:
R be at leas t50%. This wil lprotect the engine
coolin gsystem agains tfreezin gdown to
around -3 7†.
R not excee d55% (antifreeze protection
down to -45 †);otherwise, heat will not be
dissipated as effectively.
If the vehicle has los tcoolant, top it up with
equal amount sofwater and antifreeze/cor- rosion inhibitor. Mercedes-Benz recom-
mends an antifreeze/corrosion inhibitor
which has been approved for Mercedes-Benz.
! The engin ecoolin gsystem is filled with
coolant that must be renewed after 15
years, or after 250,000 km at the lates t. Vehicl
edata
Pleas enotet hat for the speci fied vehicle
data:
R the height sspecified may var yasaresult
of:
- tyres
- load
- conditio nofthe suspen sion
- optional equipment
R item sofo ptional equipmen tincrease the
unlade nweight and reduc ethe maximum
payload. The unladen weight is speci fied in
accordanc ewith EC directive and includes:
- driver (68 kg)
- luggage (7 kg)
- all fluids (fuel tan k90% full)
R veh icle-specific weigh tinformation can be
found on the vehicl eidentification plate
(Y page 37 2).
R only for cer tain countries: you can find vehi-
cle-specific vehicle data in the COC docu-
ment s(CERTIFICATE OF CONFORMITY).
Thes edocuments ar edelivered with your
vehicle.
Missing values were not available at tim eof
going to print. All models
Vehicle lengt
h(ECE) 480
4mm Vehicle width
including exterior
mirrors
214
1mm Vehicle width with-
out exterior mirrors 192
6mm Vehicl
edata
377Techni caldata Z