2012 MERCEDES-BENZ GL SUV change key battery

Changing th
esettings of th elocking
system
You can chang ethe settings of th elocking
system. This mea nsthat only the driver' sdoor
and th efuel filler flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel on your own.
X To change th esetting: press and hold
down the %and& buttons simulta-
neously for approximately six seconds until
the battery chec klamp flashes twice
(Y page 79).
i If the settin gofthe locki ngsystem is
changed within th esignal range of th evehi-
cle ,pressi ngthe & or% button:
R locks or
R unlock sthe vehicle
The ke ynow functions as follows:
X To unloc kthe drive r'sdoor: press the
% button once.
X To unlock cen trally:pressthe % but-
to nt wice.
X To lock centrally: pressthe & button.
The KEYLESS-GO function is changed as fol-
lows:
X To unlock th edriver's doo r:touch the
inner surface of the doo rhandle on the
driver' sdoor.
X To unlock centrally: touch theinner sur-
fac eo fthe door handle on th efront-
passenger door or th erear door.
X To lock centrally: touch theouter sensor
surface on one of the door handles
(Y page 77).
X To restor ethe facto rysettings: press
and hold down the %and& buttons
simulta neousl yfor appr oximate ly six sec-
onds until th ebatter ychec klamp flashes
twic e(Ypage 79). Emergency key element
General notes If th
evehicle can no longer be locke dor
unloc kedw itht he key ,use th eemergency
key element.
If yo uuse th eemergenc ykey elemen tto
unlock and open the driver' sdoor, the anti-
thef talarm system will be triggered
(Y page 71).
There are several ways to tur noff th ealarm:
X To turn the alarm off with the key: press
the % or& buttonont he key.
or
X Insert the key int othe ignition lock.
or
X To deactivat ethe alarm with KEYLESS-
GO: press th eStart/Stop button in the igni-
tion lock. The key must be in the vehicle.
or
X Lock or unlock the vehicle using KEYLESS-
GO. The key must be outside the vehicle.
If you unlock the vehicle using the emergency
key element, the fuel filler fla pwilln ot be
unlocked automatically.
X To unlock th efuel fil lerf lap: insert the
key into the ignition lock.
Removing the emergency key element :
Releas ecatch
; Emergency key element 78
KeyOpening and closing

X
Push release cat ch: in the direction of
the arrow and at the same time, remove
emergenc ykey element ;from the key. Ba
ttery of the key
Important safety notes G
WARNING
Batteries are toxic and contain caustic sub-
stances. For this reason, keep batteries out of
the reach of children.
If ab attery has been swallowed, visit adoctor
immediately. H
Environment
alnote Bat
teri es contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collec teds ep-
arately and disposed of in an
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.
Mercedes-Benz recommends that you have
the batteries replaced at aqualified specialist
workshop. Checking the battery X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharge difbattery check
lamp :does not light up briefly.
X Change the battery (Y page 79).
i If the key battery is checked within the
signal reception range of the vehicle, press-
ing the &or% button:
R locks or
R unlocks the vehicle
i You can get abattery at any qualified spe-
cialist workshop.
Replacing the battery You require
aCR20253Vc ell battery.
X Take the emergenc ykey elemen tout of the
key (Y page 78). :
Battery compartment cover
; Emergency key element Key
79Openin gand closing Z

Problems wit
hthe key Problem Possible causes/consequences and
M Solutions
Yo
uc annot lock or
unlock the vehicle
using the key. The key battery is discharged or nearly discharged.
X
Try again to lock/unlock the vehicle using the remote control
function of the key. Point the tip of the key at the driver' sdoor
handl efrom close rang eand pres sthe % or& button.
If this does not work:
X Chec kthe key battery (Y page 79)and replace it if necessary
(Y pag e79).
X Lock (Y page84) or unlock (Y page85) the vehicl eusing
the emergenc ykey element. The key is faulty.
X
Loc k(Ypage 84 )orunlock (Y page85) the vehicl eusing
the emergenc ykey element.
X Hav ethe key chec kedataq ualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. There is interference from
apowerfu lsource of radio waves.
X Lock/unloc kthe vehicle usin gthe remote con trol func tion of
the key. Point the tip of the key at the driver' sdoor handl efrom
close rang eand pres sthe % or& button. There is
afault with KEYLESS-GO.
X Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver' sdoor handl efrom
close rang eand pres sthe % or& button.
X Hav eKEYLESS-GO checked at aqualified specialist workshop.
If this does not work:
X Check the key battery (Y page 79) and replace it if necessary
(Y page 79).
X Lock (Y page 84) or unlock (Y page 85) the vehicle using
the emergency key element. You have lost
akey. X
Hav ethe key deactivated at aqualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Key
81Openin gand closing Z

It is poss
iblet om ake use of the residual heat
of the engine to continue heating the station-
ary vehicle for up to 30 minutes after the
engine has been switched off. The heating
time depends on the temperature that has
been set for the vehicle interior.
X To activate: press theÌ/Á button.
The indicator lamp in the Ì/Á but-
ton lights up.
i The blower wil lrun at alow speed regard-
less of the airflow setting.
i If you activate the residual heat function
at high temperatur es,only the ventilation
will be activated. The blower runs at
medi um speed.
X To deactivate: pressthe Ì/ Ábut-
ton.
The indicator lam pintheÌ /Á but-
ton goes out.
Residual heat is deactivated automatically:
R after approximately 30 minutes
R when the igni tion is switched on
R if the battery voltage drops
R when the auxiliar yheatin gisa ctivated Auxiliary heating
Important safety notes G
WARNING
Exhaus tfume sare produced when the auxili-
ary heating is in operation. Inhaling these
exhaust fumes can be poisonous. You should
therefo reswitch off the auxiliary heating in
con fined spaces without an extraction sys-
tem, e.g. agarage. G
WARNING
When operating the auxiliary heating parts of
the vehicle can get very hot. Make sure that
the exhaust system does not under any cir-
cumstances come into contact with easily
ignitable material such as dry grass or fuels.
The material could otherwise ignite and set the vehicle alight. Choos
eyour parkin gspot
accordingly.
Operating the auxiliary heating is thus pro-
hibited at fillin gstations or when your vehicle
is being refuelled .You must therefor eswitch
off the auxiliary heating at filling stations.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for alonger
distance.
i Switch the auxiliary heatin gonregularly
once amonthfor about ten minutes.
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.
You cannot use the auxiliary ventilation 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 climate control is set to 148
Operating the climate control systemClimate control