2012 MERCEDES-BENZ GL SUV Battery

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

Vehicle
Display messages Possible caus
es/consequences and M Solutions
To start engine,
shift to either P
or N Yo
uh avea ttempte dtostart the engine with the transmission in
position Ror D.
X Shift the transmission to position Por N. Auxiliary battery
malfunction The auxiliary battery for the automatic transmission is no longer
being charged.
X Visit aqualified spec ialist worksho patthe nex toppor tunity.
X Until then, set the automatic transmission to position Pbefore
yo us witch off the engine.
X Before leaving the vehicle, appl ythe electr ic parking bra ke.
X Secure the vehicle agai nstrolling away ( Ypage 181). Ap
plyb rake to deselect Par
k(P) position Yo
uh ave attempted to mov ethe transmission selector lever to
position D,Ror Nwithout depressing the brake pedal.
X Depress the brake pedal. Risk of vehicle
rollin
gTransmis‐ sion not in P Th
ed river's door is open and th etransmission is in position R,N
or D.
Aw arning ton ealso sounds.
X Shift th etransmissio ntoposition P.
X Secur ethe vehicl eagainst rolling away ( Ypage 181). Wi
thoutc hanging gear, consult work‐
shop Yo
uc annot change the transmission position due to amalfunction.
Aw arning ton ealso sounds.
If transmission position Dis selected:
X Drive to aqualified specialist workshop without shiftin gthe
transmissio nfromp osition D.
If transmission position R,Nor Pis selected:
X Consult aqualified specialist workshop. On
ly select Park (P) whe
nvehicle is stationary Th
ev ehicle is moving.
X Pull ove rand sto pthe vehicle safel yassoonasp ossible, paying
attention to roa dand traffic conditions.
X Shift the transmissio ntoposition P. Display messages
319On-board computer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
j
Ch
eckt railer hitch lock Th
et railer to whitch is no tcorrectly engaged.
Aw arning ton ealso sounds.
X Stop th evehicle immediately, payin gattentio ntoroad and traf-
fic conditions, and switc hoff th eengine.
X Secure the vehicl eagainst rolling away (Y page 181).
X Engage the trailer coupling' sball coupling in the end position
(Y page 259). Ð
Power
steering mal‐
function Se
eOwn‐ er's Manual Th
ep ower steerin gassistanc eisf aulty.
Aw arning ton ealso sounds.
G WARNING
You will need to use mor eforce to steer.
Ther eisar isk of an ac cident.
X Check wheth er youare able to appl ythe ext raforce required.
X If you are abl etosteer safely: carefully drive on to aqualified
specialist workshop.
X If you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop. &
inoperativ
eBat‐ tery low Yo
uh ave attempted to switch on the auxiliary heating or to acti-
vate adeparture tim eusing the on-boar dcomputer after operating
the auxiliary heatin gtwice.
X Let the engine run for 10 seconds.
The auxiliary heating is operational again. The on-board voltage is too low. The auxiliary heating has switched
itself off or cannot be switched on (Y
page 148).
X Driv efor alonger distance.
The battery is being charged. The auxiliary heatin gisoperational
again as soon as the on-boar delectrical system voltage is suf-
ficient. &
inoperative
Refuel
vehicle There is too little fuel in the fuel tank
.The auxiliary heating cannot
be switched on (Y page 148).
X Refuel at the nearest filling station. Displa
ymessages
321On-board compu tera nd displays Z

Make sur
ethat children travellin ginthe vehi-
cle ar enot able to injure themselves on the
hot cigarette lighter or cause afire with it.
! The cigarette lighter in the centre console
in the front compartmen tisn ot intended
for operatin gthe tyr einflation compressor. X
Turn the key to position 2in the ignition
lock.
X To open: slide cover :to its foremost
position.
X Pres sinc igarette lighter ;.
Cigarette lighter ;will pop out automati-
cally when the heating element is red-hot.
X To close: pull cover :back as far as it will
go. 12
Vsockets
General notes X
Turn th ekey to position 1in th eignition
lock.
Wit hthe exception of th esocket in th efront
centr econsole, all socket scan be used for
accessories with amaximum curren tdraw of
240 W(20 A) .The socket in the front centre
console can be used for accessories with a
maximum curren tdraw of 180 W(15 A).
Accessories includ esuch items as lamp sor
charg ersf or mobi lephones.
If you use the sockets for long periods when
the engine is switched off ,the battery may
discharge. i
An emergency cut-of fensure sthat the on-
board voltage does not drop too low. If the
on-boar dvoltage is too low, the power to
the socket sisautomatically cut. This
ensures that there is sufficient power to
start the engine.
Socket in the front centre console !
The socket is not intended for operating
the tyre inflation compressor. X
To open: slide cover :to its foremost
position.
X Lift up the cover of socket ;.
X To close: pull cover :back as far as it will
go.
Socket in the rear-compartment centre
console X
Lift up the cover of socket :.
On vehicles with the Rear Seat Entertainment
System, there are two sockets in the rear-
compartmen tcentre console. 350
FeaturesStowing and features

i
The ASSYST PLU Sservice interval display
does not show any information on the
engine oil level. Observ ethe notes on the
engin eoil level (Y page 362).
The multifunction display shows aservice
message for afew seconds, e.g.:
Next servic eAin .. days Service
Adue Service
Aoverdue by ... days Th
eletter indicates which service is due. Astands for
aminor servic eand B for
am ajor
service. Anumber or another letter may be
displayed after the letter. This figure indicates
any necessary additional maintenanc ework
to be performed.
If you notify aqualified specialist worksho pof
this display, you will receive astatement on
the associated costs.
The ASSYST PLUS service interval display
doe snot tak einto account any periods of
tim eduring which the battery is disconnec-
ted.
Maintaining the time-dependent service
schedule:
X Note down the service du edated isplayed
in the multifunction displa ybefor ediscon-
nectin gthe battery.
or
X After reconnecting the battery ,subtract
the battery disconnection periods fro mthe
service date shown on the display.
Hiding aservice message X
Pres sthe % ora button on th esteer-
ing wheel. Displaying service messages X
Switch th eignitio non.
X Press the =or; button on the steer-
ing whee ltoselect the Serv. men
u.
X Press the 9or: button to select the
ASSYS TPLUS submenu and confirm by
press ingt he a button.
The service due date appears in the multi-
function display.
Informatio nabout Service Resetting th
eASSYST PLUS service inte r-
val display
! If the ASSYS TPLUS service interva ldis-
play has been inadvertently reset ,this set-
tin gc an be corrected at aqualified special-
ist workshop.
Have service work carried out as described
in the Servic eBooklet. This ma yotherwise
lead to increased wear and damage to the
major assemblies or the vehicle.
Aq ualified specialist workshop, e.g. a
Mercedes-Ben zService Cent re,w ill reset the
ASSYST PLU Sservic einterval display after
the service work has bee ncarried out. You
can also obtain further information on main-
tenance work, for example.
Special service requirements
Arduous operating conditions or increased
loads on the vehicle will require some service
work to be performed more often than for a
vehicle in normal use. Such arduous condi-
tions include regular city driving with frequent
intermediate stops and use in mountainous
terrain or on poor road surfaces.
For example, if the vehicle is used under ardu-
ous operating conditions, have air filters,
engine oil and oil filters changed frequently
and check the wheels often .Further informa-
tion can be obtaine dataqualified specialist
workshop, e.g. aMercedes-Ben zService
Cent re. Service
365Maintenance and care Z

High-pressure cl
eaning equipment G
WARNING
Do not use high-pressure cleaner swith circu-
lar-jet nozzles (dirt grinders) to clean your
vehicle ,inparticular the tyres. You could oth-
erwise damage the tyres and cause an acci-
dent.
! Always maintain adistance of at least
30 cm between the vehicle and the high-
pressure cleaner nozzle. Information about
the correc tdistanc eisavailable from the
equipment manufacturer.
Move the high-pressure cleane rnozzle
around when cleanin gyour vehicle.
Do not aim directly at any of the following:
R tyres
R door gaps, roof gaps, join tsetc.
R electrical components
R battery
R connectors
R lights
R seals
R trim elements
R ven tilation slots
Damaged seals or electrical components
can lead to leaks or failures.
Cleanin gthe paintwork !
Do not affix:
R stickers
R films
R magnetic plate sorsimilar items
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosive deposits, areas affected
by corrosion and damage caused by inade-
quate care cannot always be completely
repaired. In such cases, visit aqualified spe-
cialist workshop. X
Remove impurities immediately, where
possible, whils tavoiding rubbing to ohard.
X Soak insect remains with insect remover
and rinse off the treated areas afterwards.
X Soak bird droppings with water and rinse
off the treated areas afterwards.
X Remove coolant, brake fluid, tree resin,
oils, fuels and greases by rubbing gently
with acloth soaked in petroleum ether or
lighter fluid.
X Use tar remover to remov etar stains.
X Use silicone remover to remove wax.
Care and treatment of mat tpaintwork !
Never polis hthe vehicle or the light alloy
wheels. Polishin gmakes the paintwork
shiny.
! The following may cause the paint to
become shiny and thus reduce the matt
effect:
R Vigorous rubbing with unsuitable mate-
rials.
R Frequent use of car washes.
R Washing the vehicle in direct sunlight.
! Never use paint cleaner, buffing or pol-
ishing products, or glos spreserver, e.g.
wax .These product sare onl ysuitable for
high-glos ssurfaces. Thei ruse on vehicles
wit hm att finish leads to considerable sur-
face damage (shiny, spotted areas).
Always have paintwork repairs performed
at aq ualified specialist workshop, e.g. a
Mercedes-Ben zService Centre.
! Do not use wash programs with ahot wax
treatmen tunder any circumstances.
Observe thes enotes if your vehicle has a
clea rmatt finish. This will help you to avoid
damage to the paintwork due to incorrect
treatment.
Thes enotes also apply to light-alloy wheels
with aclear matt finish. 368
CareMaintenance and care

E
Pressur erelease button
F Pressur egauge
X To reduce the tyr epressure: press pres-
sure releas ebutton Eon the filler hose.
X Stow the tyre sealant bottle, the tyre infla-
tion compressor and the warning triangle.
X Drive to the nearest qualified specialist
worksho pand have the tyre changed there.
X Have the tyre sealant bottle replace das
soon as possible at aqualified specialist
workshop.
X Have the tyre sealant bottle replaced every
four years at aqualified specialist work-
shop.
i In your vehicle, you will find asticker with
the Mercedes-Benz Service24h telephone
number, e.g. on the B-pillar on the driver's
side. Battery (vehicle)
Important safety notes
Work on the battery, e.g. removin gorinstal-
ling ,requires specialist knowledge and the
use of special tools. Therefore, always have
work on the batter ycarried out at aqualified
specialist workshop. G
WARNING
Work carried out incorrectly on the battery
can, for example, lead to ashort circui tand
damage your vehicle's electronic system. This
can disrupt driving safety systems such as ABS (anti-lock braking system) or ESP
®
(Elec-
tronic Stability Program).
R If ABS malfunctions ,the wheels can lock
during braking. This limits the steerability
of the vehicle when brakin gand the braking
distance may increase. There is arisk of
accident.
R If ESP ®
malfunctions, the vehicle will not be
stabilised if it start stoskid or awheel star ts
to spin. There is arisk of accident.
You should therefore have all work involving
the batter ycarried out at aqualified specialist
workshop. G
WARNING
Electrostatic build-up can lead to the creation
of sparks, which could ignite the highly explo-
sive gases of abattery. There is arisk of an
explosion.
Befor ehandling the battery, touch the vehicle
body to remove any existing electrostatic
build-up.
The highly flammable gas mixture forms when
charging the battery as well as when jump-
starting.
Always make sure that neither you nor the
batter yiselectrostatically charged. There is
ab uild-up of electrostatic charge, e.g.:
R by wearing clothing made from synthetic
fibres
R due to friction betwee nclothin gand seats
R if you pus horpull the batter yacross the
carpe torother synthe ticm aterials
R if you wipe the batter ywithacloth. G
WARNING
Durin gthe charging process, abatter yprodu-
ces hydroge ngas. If ashort circui toccurs or
sparks are created, the hydroge ngas can
ignite. There is arisk of an explosion. 382
Battery (vehicl
e)Breakdown assistance

R
Make sur ethat the positive terminal of a
con nected battery doe snot com einto con-
tact with vehicl eparts.
R Never place metal objects or tools on abat-
tery.
R It is important that you observe the descri-
bed order of the battery terminals when
connectin gand disconnectin gabattery.
R When jump-starting, make sure that the
battery poles with identical polarity are
connected.
R It is particularly important to observe the
described order when connectin gand dis-
connectin gthe jum pleads.
R Never connect or disconnect the battery
terminals while the engine is running. G
WARNING
Bat tery acid is caustic. There is arisk of injury.
Avoid contact with the skin, eyes or clothing.
Do not inhale any battery gases. Do not lean
over the battery. Keep children away from
batteries. Wash battery acid immediately with
water and seek medical attention. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and dispose
dofinan
environmen tally responsible
recycling system. Dispose of batteries in an
environmentally responsible
manner
.Take discharged
batteries to aqualified spe-
cialist workshop or to acol-
lection point for used batter-
ies.
! Hav ethe battery chec kedr egularly at a
qualified specialist workshop.
Observ ethe service intervals in the Service
Booklet or con tact aq ualified specialist
worksho pfor mor einformation. !
You should have all work involving the
battery carried out at aqualified specialist
workshop. In the exceptional case that it is
necessar yfor you to disconnect th ebattery
yourself, mak esure that:
R you switc hoff the engine and remove the
key. On vehicles with KEYLESS-GO,
ensure that the ig nition is switched off.
Chec kthat all the indicator lamps in the
instrumen tcluster are off. Otherwise,
electronic components, such as the
alternator, may be damaged.
R you first remov ethe negativ eterminal
clam pand then the positive terminal
clamp. Never swap the terminal clamps.
Otherwise, the vehicle's electronic sys-
tem may be damaged.
R the transmissio nislocke dinp osition P
after disconnectin gthe battery .The vehi-
cle is secured against rolling away. You
can then no longer mov ethe vehicle.
The battery and the cover of the positive
termi nalclamp must be fitted securely dur-
ing operation.
Comply with safety precautions and take pro-
tective measures when handling batteries. WARNING
Fire, naked flames and smoking
are prohibited when handling the
battery
.Avoi dc reating sparks. Battery aci
discaustic. Avoid con-
tact with the skin, eyes or clothing.
Wear suitable protective clothing,
in particular gloves, an apron and
af ace mask.
Immediately rinse acid splashes
off with clean water. Consult adoc-
tor if necessary. Wear eye protection. Ba
ttery (vehicle)
383Breakdown assistance Z