MERCEDES-BENZ GL SUV 2012 Owners Manual

Displa
ymessages Possible causes/consequences and
M Solutions
PR
E-SAFE Functions cur‐
rently limited See
Owner'
sManual Vehicles with the Active Driving Assistance package:
PRE-SAFE
®
Brake is tempora rily inoperative. Possibl ecauses:
R thef unction is impaire ddue to heav yrain or snow.
R thes ensor sint he ra diatortrim and in th ebumpers are dirty.
R the rada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emit tedbyn earby TV or radi osta-
tions or othe rsources of elect romagnetic radiation.
R AM Gvehicles: ESP ®
is deactiva ted.
R the system is outside the operatin gtemperatur erange.
R the on-board voltage is too low.
Onc ethe causes listed abov enolonger apply ,the displa ymessage
goes out.
PRE- SAFE ®
Brake is operational again.
If the displa ymessage does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rollin gaway (Y page 181).
X Clean the sensors in the radiator grille and the bumper
(Y page 370).
X Restart the engine.
X AMG vehicles: reactivate ESP ®
(Y page 67). PRE-SA
FE Functions limited
See Owner's Manual Vehicles withou
tthe Activ eDriving Assistance package: Adapti ve
Brake Assis tisf aulty. The distanc ewarning function may also have
failed.
Vehicles with the Active Driving Assis tance package:
PRE-SAFE ®
Brak eisf aulty. BA SPLUS or th edistanc ewarning
function may also have failed.
X Visit aqualified specialist workshop. ü If the symbol appears in the multifunction display,
aseat belt
tongue has been inser tedi nto arear seat belt buckle.
Fur ther information on the status indicator for the rear seat belts
(Y page 49). 298
Display messagesOn-boar
dcomputer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
ý If th
esymbol appears in the multifunction display, aseat belt
tongue has not been inser tedinar ear seat belt buckle.
G WAR
NING
As eat belt which is not worn cor rectly, or which has not been
engage dinthe seat belt buckle cor rectly, cannot provide the
intende dlevel of protection.
This poses an inc reased risk of injury.
X If necessary, ask the occupants in the rear to fasten their seat
belts (Y page 47).
Further information on the status indicator for the rear seat belts
(Y page 49). 6
Restra
int sys. mal‐
functio
nConsult workshop There is
amalfunction in the SRS (Supplemental Restraint Sys-
tem).
The 6 warning lamp also lights up in the instrument cluster.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
This pose sanincreased risk of injury.
X Visit aqualified specialist workshop.
Further information on occupant safety (Y page 41).6
Front
left malfun
c‐ tion Consult work‐
shop or
Front right malfunction Con‐
sult workshop SRS ha
smalfunctioned at the fron tonthe lef torright. The 6
warnin glamp also lights up in the instrument cluster.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
This pose sanincreased risk of injury.
X Visit aqualified specialist workshop. 6
Rear left malfun
c‐ tion Consult work‐
shop or
Rear right malfunction Con‐
sult workshop SRS ha
smalfunctioned at the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
This pose sanincreased risk of injury.
X Visit aqualified specialist workshop. Display messages
299On-board computer and displ ays Z

Displa
ymessages Possible causes/consequences and
M Solutions
6
Re
ar centre mal‐ function Consult
workshop SRS ha
smalfunctioned at th erear centre. The 6warning lamp
also lights up in th einstrument cluster.
G WARNING
The airbags or belt tensioners ma yeither be triggered uninten-
tionally or, in the even tofanaccident, may not be triggered.
Th isposes an incr easedriskofi njury.
X Vis itaq uali fieds pecialist workshop. 6
Left
windowbag mal‐
function Consult
workshop or
Right windowba
gmalfunc‐ tion Consul
twork‐ shop There is
amalfunction in the left-hand and/or right-han dwindow-
bag. The 6warnin glamp also lights up in the instrument clus-
ter.
G WARNING
The left or right windowbag may either be triggered unintentionally
or, in the event of an accident, may not be triggered.
This pose sanincreased risk of injury.
X Visit aqualified specialist workshop. Lights
i Display messages about LEDs:
This display messag ewill only appear if all LED shave failed. Display messages Possible causes/consequences and
M Solutions
b
Left cornering
light orRigh
tcor‐ nering light Th
eleft or right-han dcornerin glight is faulty.
X Check whether you are permitted to replace the bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Left dipped
beam orRigh
tdipped beam Th
eleft or right-han ddipped-beam headlamp is faulty.
X Check whether you are permitted to replace the bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Traile
rleft indi‐ cator or
Trailer right indicator Th
eleft or right-han dtrailer turn signa llamp is faulty.
X Check whethe ryou ar epermitted to replace the bulb yourself.
or
X Visit aqualified specialist workshop. 300
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
b
Re
ar lef ti ndica‐ tor or
Re ar right indicator Th
er ear left-han dorrear right-hand tur nsignal is faulty.
X Check whether you are permitted to replac ethe bulb yourself
(Y page 12 9).
or
X Visit aqualified specialist workshop. b
Fron
tleft indica‐ tor or
Front right indicator Th
ef ront left-hand or front right-hand turn signal is faulty.
X Check whethe ryou ar epermitted to repla cethe bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Left
mirror indica‐
tor orRigh
tmirror indicator Th
et urns ignal in the left-han dorright-han dexterior mirror is
faulty.
X Check whether you are permitted to repla cethe bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Thir
dbrakel amp Th
et hirdb rake lamp is faulty.
X Check whethe ryou ar epermitted to repla cethe bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Left brake
lamp orRigh
tbrake lamp Th
eleft or right-han dbrake lamp is faulty.
X Check whethe ryou ar epermitted to repla cethe bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Left-han
dtail lamp/brake
lamp or
Right-hand tail lamp/brake
lamp Th
eleft or right-han dtail lamp/brak elamp is faulty.
X Check whether you are permitted to replac ethe bulb yourself
(Y page 12 9).
or
X Visit aqualified specialist workshop. Display mess
ages
301On-board computer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
b
Le
ft main beam or
Ri ghtm ain beam Th
eleftorr ight-han dhigh beam is faulty.
X Check whether you are permitted to replac ethe bulb yourself
(Y page 12 9).
or
X Visit aqualified specialist workshop. b
Number plat
elamp Th
eleft or right-han dlicence plate lamp is faulty.
X Check whether you are permitted to replac ethe bulb yourself
(Y page 12 9).
or
X Visit aqualified specialist workshop. b
Rear fo
glamp Th
er ear foglam pisfaulty.
X Check whether you are permitted to replac ethe bulb yourself
(Y page 12 9).
or
X Visit aqualified specialist workshop. b
Front
left parking
lamp orFron
tright parking lamp Th
ef ront left or front right parking lamp is faulty.
X Check whethe ryou ar epermitted to repla cethe bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Reversin
glight Th
er eversin glamp is faulty.
X Check whether you are permitted to replac ethe bulb yourself
(Y page 12 9).
or
X Visit aqualified specialist workshop. b
Left tail
lamp orRigh
ttail lamp Th
eleft or right-han dtail lamp is faulty.
or
The rear left or right side marker lamp is faulty.
X Check whether you are permitted to replac ethe bulb yourself
(Y page 12 9).
or
X Visit aqualified specialist workshop. 302
Display mess
agesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
b
Le
ft daytim edriv‐ ing lamp or
Ri ght daytim
edriving lamp Th
eleft-han dorright-hand daytime drivin glamp is faulty.
X Chec kwhether you ar epermitted to replace the bulb yourself
(Y page 129).
or
X Visit aqualified specialist workshop. b
Intell
.Light Sys‐ tem inoperative Th
eI ntelligent Light Syste misfaulty. The lights remain available
without the Intelligent Light System.
X Visit aqualified specialist workshop. b
Malfunctio
nSee Owner's Manual Th
ee xterior lighting is faulty.
X Visit aqualified specialist workshop. Vehicles with trailer tow hitch:
afuse may have blown.
X Check the fuses (Y page 391).
X If necessary, replace the blown fuse. Observe the warning notes
as you do so.
If the displa ymessage continues to be displayed:
X Visit aqualified specialist workshop. b
AUTO
lights inoper‐
ative The light senso
risf aulty.
X Visit aqualified specialist workshop. b
Switch of
flights Th
elights are still switched on when you leave the vehicle. A
warnin gtone also sounds.
X Tur nthe light switc htoÃ. Adaptive Main-beam
Assist inoperative Adaptive Highbea
mAssist is faulty.
X Visit aqualified specialist workshop. Adaptive Main-beam
Assist currently
unavailabl
eSee Owner's Manual Adaptive Highbea
mAssist is deactivate dand temporarily inoper-
ative. Possible causes:
R the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, sno worfog.
X Clean the windscreen.
If the system detec tsthat the camera is fully operational again,
the Adaptive Main-beam Assist available again message
is displayed.
Adaptive Highbeam Assist is operational again. Display messages
303On-board computer and displays Z

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
¸
Re
place air cleaner Vehicles with
adiesel engine: th eenginea ir filte risdirty and must
be replaced.
X Visit aqualified specialist workshop. !
Clean
the fuel fil‐
ter Vehicles with
adiesel engine: there is water in the fuel filter .The
water must be drained off.
X Visit aqualified specialist workshop. Ø
Refill AdBlue See
Owner'
sManual Th
eA dBlue ®
level has fallen below the reserve range. Awarning
ton ealso sounds.
X Hav eAdBlue ®
refill ed as soon as possible at aqualified spe-
cialist workshop.
or
X Refill AdBlue ®
yourself as soo naspossible (Y page 178). Ø
Re
fill AdBlue No start in .. km Th
eA dBlue ®
level is only sufficient for th eindicated dis tance. A
warning tone also sounds.
X Hav eAdBlue ®
refill ed as soon as possible at aqualified spe-
cialist workshop.
or
X Refill AdBlue ®
yourself immediately (Y page 178).Ø
Re
fill AdBlue Eng.
start not possible Th
eA dBlue ®
tank is empty. Awarning ton ealso sounds. You can
no longer start th eengine.
X Consult aqualified specialist workshop immediately.
or
X Refill AdBlue ®
yourself immediately (Y page 178).Ø
Ch
eckA dBlue See Owner'
sManual Th
eA dBlue ®
system is malfunctioning. Awarning ton ealso
sounds.
X Visi taq ualifieds pecialist workshop. Ø
Eng.
start not pos‐
sibl
ein. .. km Th
eA dBlue ®
system is malfunctioning. Awarning ton ealso
sounds.
X Visit aqualified specialist workshop immediately. Ø
Eng.
start not pos‐
sible The AdBlue
®
system is malfunctioning. Awarning ton ealso
sounds. You can no longer start the engine.
X Consult aqualified specialist workshop immediately. 306
Display messagesOn-board computer and displays

Driving systems
Display messages Possible causes/consequences and
M Solutions
À
At
tention Assist: Tak
eab reak! Base
doncertai ncrite ria, ATTENTION ASSIST ha sdetecte dfatigue
or alack of con centration on the part of the driver. Awarning tone
als os ounds.
X If necessary, tak eabreak.
During long journe ys,take regular breaks in goo dtime so that you
get enoug hrest. À
Attention Assist
inoperative ATTENTION ASSIS
Tisinoperative.
X Visi taq ualifieds pecialist workshop. Á
Please
reduce speed You can
notc hang ethe vehicle level. Possible causes:
R you ar edriving to ofast for the selected vehicle level.
R you are towing atrailer.
R thet railer-coupling socket is being used ,e.g. for abicycle rack.
X Driv emore slowly and then select the desire dvehicle level
again.
R Vehicles with the ON&OFFROA Dpackage (Y page 207)
R Vehicles with the AIRMATI Cpackage (Y page 213)
X Observ ethe notes on towing atrailer (Y page 257). Á
Co
mpressor is cool‐
ing Yo
uh ave selected ahigher vehicle level. The compressor first
needs to cool down because of frequen tlevel changes.
X Driv einam anner appropriate for the curren tvehicle level.
X Make sure that ther eissufficien tground cle arance.
X Allow the compresso rtocool down.
When the compressor has cooled down, the display message
disappears. The vehicle then con tinues rising to the selected
level. Á
Malfunction AIRMATIC is faulty.
X
Drive as appropriate for the current vehicl elevel, but do not
exceed 80 km /h.
X Make sur ethat ther eissufficient ground clearance.
X Have the vehicle checked at aqualified specialist workshop. Display messages
307On-board computer and displays Z