2012 MERCEDES-BENZ GL SUV bonnet

Engine
Display messages Possible causes/consequences and
M Solutions
+
Top
up co
olant See
Owner'
sManual Th
ec oolant leve listoo low.
! Avoi dmaking long jour neys with too little coolant in the engine
cooling system. The engin ewill otherwise be damaged.
X Top up th ecoolant ,obser ving the warning note sbefore doing
so (Y page 363).
X If th ecoolant needs toppin gupmoreo ften than usual ,have the
engin ecoolant system checked at aqualified specialist work-
shop. ? The fan motor is faulty.
X
If the coolant temperatur eisbelow 12 0†,you can continue
dri ving to the nearest qualified spe cialist workshop.
X Avoid heav yloads on th eengineasy ou do so, e.g. driving in
mou ntainous terrain and stop-start traffic. ?
Co
olantS topv ehi‐ cle Switch engine
off Th
ec oolant is too hot.
Aw arning ton ealso sounds.
G WARNING
Never driv ewithano verheated engine. Drivi ngwhen your engine
is overheate dcan cause fluids that may have leaked int othe
engin ecompartment to catch fire.
Stea mfromano verheated engine can cause serious burns, which
can occ urjus tbyo pening the bonnet.
There is ariskofi njury.
X Stop the vehicl eimmediately, paying att entio ntor oad and traf-
fic conditions, and switc hoff th eengine.
X Secure the vehicl eagainst rolling away (Y page 181).
X Leave the vehicle and keep asafe distance from the vehicle until
the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 120 †. The engine may
otherwise be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit aqualified specialist
worksho pimmediately.
Unde rnormal operatin gconditions and with the specified coolant
level, the coolant tempera ture mayrise to 120 †. 304
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
# The battery is no
tbeing charged.
Aw arning ton ealso sounds.
Possible causes:
R fault yalternator
R torn poly-V-belt
R am alfunction in the elect ronics
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult aqualified specialist workshop.
If the poly-V-belt is OK:
X Visit aqualified specialist workshop. 4
Chec
keng. oil lev. when next
refuelling Th
ee ngine oil level has dropped to the minimum level.
Aw arning ton ealso sounds.
X Chec kthe oil level when nex trefuelling, at the latest
(Y page 362).
X If necessary, top up the engine oil (Y page 362).
X Hav ethe engin echecked at aqualified specialist worksho pif
the engine oil needs topping up more often than usual. 4
Top up wit
h1 litre of engine
oil when next refu‐
elling AM
Gvehicles: the engine oil level is too low.
X Check the oil level when next refuelling, at the latest
(Y page 362).
X If necessary, top up the engine oil (Y page 362).
X Hav ethe engin echecked at aqualified specialist worksho pif
the engine oil needs topping up more often than usual. 8
Reserv
efuel level Th
ef uel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level
drops into the reserve range.
X Refuel at the nearest filling station. C There is only
avery small amount of fuel in the fuel tank.
The auxiliary heatin gcannot be operated.
X Refuel at the nearest filling station without fail. Display messages
305On-board computer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
A The tailgat
eisopen.
G WARNING
When the engine is running ,exhaus tgases can enter the vehicle
interior if the tailgate is open.
There is arisk of poisoning.
X Close the tailgate. ? The bonnet is open.
Aw
arning ton ealso sounds.
G WARNING
The open bonne tmay then block your view when the vehicle is in
motion.
There is arisk of an accident.
X Pull over and stop the vehicle safely as soon as possible ,paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 181).
X Close the bonnet. Active bonnet mal‐
function Se
eOwn‐ er's Manual Th
ea ctive bonnet (pedestrian prote ction) is not activ edue to a
malfunction or because it has already been triggered.
X Visit aqualified specialist workshop. C At least one door is open.
Aw
arning ton ealso sounds.
X Close all doors. _
2nd
se
at row, left
Not locked or
2nd sea
tr ow,r ight Not locked Th
es econ drow of seat sisnot engage donthe left-hand and/or
ri gh t-hand side in the rear.
X Fol db ackt he second row of seats unt ilit engages. _
3rd
seat row, left
No
tl ocked or
3rd sea
trow,r ight Not locked Th
et hird row of seats is not engaged on the left-hand or ri ght-hand
side.
X Fol db ackt he third row of seats unt ilit engages. 320
Display messagesOn-board computer and displays

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 Secure the vehicle against rolling away (Y page 181).
X Leave the vehicle and keep asafe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and top up the coolant, observing the
warning notes (Y page 363).
X If you have to top up the coolant frequently, have the engine
cooling system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Do not start the engine again until the coolant temperature is
under 120 †. The engine may otherwise be damaged.
X Drive to the nearest qualified specialis tworkshop.
X Avoid heav yloads on the engin easyou do so, e.g. driving in
mountainous terrain 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.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartmen tto
catch fire.
Stea mfrom th eoverh eated engine can als ocaus eserious burns
which can occu rjust by opening the bonnet.
This pose sarisk of injury.
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 Secur ethe vehicle against rolling away (Y page 181).334
Warning and indicator lamps in th
einstru ment clusterOn-board computer and displays

Usefu
linfor mati on
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variation sare pos-
sible. Note that your vehicl emay not be
equippe dwith all of the function sdescri-
bed. This is also the case for system sand
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page25). Engine compartment
Bonnet
Active bonnet (pedes tria np rotection) Operating principle
!
An activ ebonnet that had been triggered
must be repaired at aqualified specialist
workshop. The activ ebonnet function will
then be available again .The additional
pedestrian protection provided by the
activ ebonnet will then be restored.
i The activ ebonnet is only available in cer-
tain coun tries. It is available for all models,
except for AMG vehicles.
The activ ebonnet can reduce the risk of injury
to pedestrians in cer tain acciden tsituations.
Raising the active bonnet increases the clear-
anc etoh ard components, such as the engine.
If the active bonnet has been triggered, it will
be raised in the area of the bonnet hinges by
approximately 100 mm. The active bonnet is
triggered by pyrotechnics.
For the drive to the workshop, reset the trig-
gered active bonnet yourself .After be ing
reset, th eactive bonnet rest sinthe area of
the bonnet hinges on the seals, and the bon-
net hinges do not enga ge.For this rea son, we
recommend that you do not excee damaxi-
mum top spee dof130 km/h on the wa yto
the worksh op.Ift he active bonnet has been triggered, pedestrian protection ma
ybelimi-
ted.
Resetting G
WARNING
There is arisk of injur yifthe bonnet is open,
even if the engin eisnot running.
Som eengine components can become very
hot.
To avoi dthe risk of burns, only touc hthose
components described in the Owner's Manual
and observ ethe relevant safety notes. G
WARNING
Make sur ethat nobody can becom etrapp ed
as you close the bonnet. X
With you rhand flat near the bonnet hinges
(arrows), push down active bonnet :until
it rest sonthe seals.
Opening th ebonnet G
WARNING
Do not pull the release lever while the vehicle
is in motion. If you do so, the bonnet may open
up and block your view. G
WARNING
There is arisk of injury if the bonnet is open,
even if the engin eisnot run ning.
Som eengine component scan become very
hot. 360
Engine compa
rtmentMaintenance and ca re

To avoi
dthe risk of burns, only touc hthose
component sdescribed in the Owner's Manual
and observ ethe relevant safety notes. G
WARNING
The radiator fa nbetween the radiator and the
engine can star tautomatically, even if the key
has been removed from the ignition lock. For
this reason, you must not reach into the fan
rotation area. You could otherwis ebeinjured.
Vehicles with apetrol engine: The elec-
tronic ignition system uses high voltage. For
this reason ,you must never touc hignition
system component s(ignition coil, ignition
cables, spark plug connectors or test socket)
while:
R the engine is running
R the engine is being started
R the ignition is switched on and the engine
is being cranked by hand
You could otherwise suffer an electric shock
and be seriously or even fatally injured.
Vehicles with adiesel engine: The elec-
tronic injection control uses high voltage. For
this reason ,you must never touc hinjection
system components while:
R the engi neis running
R the engin eisbeing started
R the ignition is switched on
You could otherwise suffer an electric shock
and be seriously or even fatally injured. G
WAR
NING
The winds creen wipers and wiper linkage
could be set in motion.
When the bonnet is open, you or others could
be injured by the wiper linkage.
Make sure that the windscreen wipers are
switched off .Remov ethe key or make sure
that no ignition position has been selected
with KEYLESS-GO. All indi cator lamps must be
off in the instrumen tpanel.
! Make sure that the windscreen wipers are
not folded away from the windscreen. Oth- er
wise ,you could damage the windscreen
wipers or the bonnet. X
Make sure tha tthe windscreen wiper sare
switche doff.
X Pull release lever :on th ebonnet.
The bonnet is released. X
Reac hinto the gap ,pull bonnet catch han-
dle ;up and lift the bonnet.
If you lift the bonnet by approximately
40 cm, the bonnet is opened and held open
automatically by the gas-filled strut.
Closing the bonnet G
WARNING
Make sure that nobody can become trapped
as you close the bonnet. Eng
inecompartment
361Maintenance and care Z

X
Lower th ebonnet and let it fal lfrom a
heig ht of approx imately 20 cm.
X Check that the bonnet has engaged prop-
erly.
If the bonnet can be raised slightly, it is not
properly engaged. Open it again and close
it with alittle more force. Radiator
Vehicles with adiesel engine: do not cover
the radiator .Donot use therma lmats, insect
protection covers or anything similar. Doing
so can cause the Onboard Diagnostics Sys-
tem to display inaccurat evalues. Some of
these values are legally required and must
always be correct. Engin
eoil
Genera lnotes Dependin
gonyour drivin gstyle, the vehicle
consumes up to 0.8 lofoil per 1,00 0km. The
oi lc onsumption ma ybehigher than this when
the vehicle is new or if you frequently drive at
high engine speeds.
Dependin gonthe engine, the oil dipstick may
be installed at adifferent location.
When checking the oil level:
R park the vehicle on alevel surface.
R the engine should be switched off for
approximately fiv eminutes if the engine is
at normal operating tempera ture.
R if the engine is not at normal operating
tempera ture,e.g. if the engine was only
started briefly, wait about 30 minutes
before carrying out the measurement. Checkin
gthe oi llevel using the oil dip-
stick Example: vehicles with
apetrol engine Example: vehicles with
adiesel engine
X Pull oil dipstick :out of the oil dipstick
tube.
X Wipe off oil dipstick :.
X Slowly slide oil dipstick :into the guide
tube to the stop, and take it out again.
If the level is between MIN mark =and
MAX mark ;,the oil level is correct.
X If the oil level has dropped to MIN mark
= or below, add 1. 0litre of engine oil.
Adding engine oil G
WARNING
If engine oil comes into contact with hot
engine parts, it may ignite and you could burn
yourself .Donot spill any engin eoil on hot
engine parts. 362
Engine compartmentMaintenance and care

accessory. It permits the chargin
gofthe bat-
tery in its installed position. Contac ta
Mercedes-Ben zService Centre for informa-
tion and availability. Charge the batter yin
accordance with the separate instructions for
the battery charger.
The jump-starting connection point is in the
engine compartmen t(Ypage 386).
Read the batter ycharger' soperating instruc-
tions befor echarging the battery.
X Open the bonnet (Y page 360).
X Connect the battery charger to the positive
terminal and earth point in the sam eorder
as when connecting th edonor battery in
the jump-startin gprocedure
(Y page 386). Battery (vehi
cle)
385Breakdown assistance Z