cooling MERCEDES-BENZ M-CLASS SUV 2011 User Guide

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

The bottles are neither secured nor prevented
from tippin gover. Therefore ,donot plac eany
ope ndrink con tainers in the stowage com-
partments.
Cup holder in the front centre console You can remov
ethe rubber ma tofthe cup
holder to clea nit. Clean them with clean,
lukewarm water only. :
Cup holders
; Cover
X To open: slidecover ;to its foremost
position.
Tem perature-controlled cup holder in
the front centre console G
WARNING
When you use the warming function, the metal
insert of the cup holder is heated. Therefore,
do not touch the cup holder insert. Otherwise,
you might burn yourself.
The tem perature-c ontrolle dcup holde rcan
be used to keep cold drinks cold and hot
drinks hot.
You can remove the rubber mat of the cup
holder to clean it. Clean them with clean,
lukewar mwater only. :
Cup holders
; Residua lheat indicator lamp
= Button
X Tur nthe key to position 2in the ignition
lock.
X To switch on th ecooling function: press
and hold button =until the blue indicator
lamp on the button lights up.
X To switch on the heating function: press
and hold button =until the red indicator
lamp on the button lights up.
X To switch off the function: press and hold
button =until the indicator lamp on the
button goes out.
When the heating func tion is used, residual
heat indicator lamp ;lights up abov eacer-
tain temperature. This mean sthat the metal
inser tofthe cup holder is hot.
Cu ph older in the rear seat armrest !
Do not sit on or support your body weight
on the rear seat armrest when it is folded
down, as you could otherwise damage it. Features
307Stowingandfeatu res 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

All models
Wheelbase
2915 mm
Unladen weight
Maximu
mroofload 10
0kg Vehicle height
178
8mm Ground clearance
191 mm
1796 mm
Ground clearance
202 mm
Tailg
ateo pening dimensions Models with: :
Opening
height ;
Maximum
headroom Stee
lsuspen-
sion 2195 mm 1987 mm
Steel suspen-
sion
33 2187 mm 1980 mm
AIRMATIC
package
34 2140 –
2215 mm 1931 –
2006 mm Traile
rtow hitch Mounting dimensions
G
WARNING
Only have atrailer tow hitch retrofit tedata
qualified specialist workshop which has the
necessary specialist knowledge and tools to
carry out the work required. Mercedes-Benz
recommends that you use aMercedes-Benz
Ser vice Centre for thi spurpose. In particular,
work relevant to safety or on safety-related
systems must be carried out at aqualified
specialist workshop.
! If you have atrailer to whitchr etrofit ted,
changes to the cooling system and drive
train may be necessary, depending on the
vehicle type.
observe the anchorage points on th echas-
sis frame.
! trailer tow hitc hfitted retrospectively with-
out changing the engine cooling system
and the drive train ,the braked and
unbraked tota ltowing weight (trailer
weight plus load weight) is reduced. Miss-
ing values wer enot available at tim eof
going to print. If higher towin gweight sare
used ,this can result in damage to your
vehi cle's engine. An ydamage that may
33
34 On vehicles with the ON&OFFROAD package, the value increases by 30 mm. 378
Trailer tow hitchTechnica
ldata
ML 250 BlueTEC 4MATIC
ML 350 4MATIC
Vehicle height
ML
350 BlueTEC 4MATICC
ML 250 BlueTEC 4MATIC:if you have a
If you have
atrailer to whitchr etrofit ted,
ML 25 0BlueTE C4MATIC.