ECU MERCEDES-BENZ GL SUV 2012 Manual PDF

The fuses in your vehicle serv
etoclose down
faulty circuits .Ifafuse blows, all the compo-
nen tson th ecircuit and their function sstop
operating.
Blown fuse smust be replaced with fuses of
the same rating, which you can recognise by
the colour and fuse rating. The fuse ratings
are listed in the fuse allocation chart.
If the newly inser tedf use also blows ,have the
cause traced and rectified at aqualified spe-
cialist workshop, e.g. aMercedes-Benz
Servic eCentre. Befor
ereplacing afuse
X Secure th evehicle against rollin gaway
(Y page 181).
X Switch off all electrical consumers.
X Turn the key to position 0in the ignition
lock and remove it (Y page 159). On vehi-
cles with KEYLESS-GO, mak esure the igni-
tion is switched off (Y page 159).
All indicator lamps in the instrumen tcluster
must be off.
The fuses are located in various fuse boxes:
R fuse box on the fron t-passenger side of the
dashboard
R fuse box in the engine compartmen tonthe
right-hand side of the vehicle, when viewed
in the direction of travel
R fuse box under the rea rbench seat
The fuse allocation char tisl ocated in the fuse
box under the rea rbench seat (Y page 393). Dashboar
dfuse box
! Do not us eapointed objec tsuch as a
screwdriver to open the cover in the dash-
board. You could damage the dashboard or
the cover.
! Make sure that no moisture can enter the
fuse box when the cover is open.
! When closing the cover, make sure that it
is lying correctly on the fuse box. Moisture seeping in or dirt could otherwis
eimpair
th eo peration of the fuses. X
To open: pull cover :outwards in the
direction of the arrow and remove it.
X To close: clip in cover :on the front of
the dashboard.
X Fold cover :inwards unti litengages. Fuse box in the engine compartment
! Make sure that no moisture can enter the
fuse box whe nthe cover is open.
! When closing the cover, make sur ethat it
is lyin gcorrectly on the fuse box. Moisture
seeping in or dir tcould otherwise impair
the operation of the fuses. X
Open the bonnet.
X Remove any existing moistur efrom the
fus eb ox using adry cloth.
X To open: open clamps ;.
X Fol dupc over:in the direction of the
arrow and remove it. 392
Electrical fusesBreakdown assistance

After
ateach-in period ,the tyr epressure
loss warning system wil lmonitor the set
tyr ep ressures of all fou rtyres.
If you wish to cancel the restart:
X Press the %button.
or
X If the Tyrepress. now OK? message
appears ,use the 9or: button to
select Cancel .
X Press the abutton.
The tyr epressure values stored at th elast
restar twill continue to be monitored. Tyr
epressur emonitor
Important safet ynotes It is the driver's responsibility to set the tyre
pressure to the recommended cold tyre pres-
sure suitable for the operatin
gsituation
(Y page 399). Note that the correct tyre pres-
sure for the curren toperatin gsituation must
first be taught-in to the tyre pressure monitor.
If ther eisas ubstantial loss of pressure, the
warning threshold for the warning messag eis
aligned to the referenc evalues taught-in.
Restart the tyre pressure monitor after
adjustin gtothe cold tyr epressure
(Y page 403). Th ecurren tpressures are
saved as new referenc evalues. This will
ensure that awarning mess agewillonly
appear if the tyre pressure drops significantly.
The tyre pressure monitor doe snot warn you
of an incorrectly set tyr epressure. Observe
th en otes on the recommended tyr epressure
(Y page 399).
Th et yre press urem onitor is not able to warn
you of asudden loss of pressure, e.g. if the
tyre is penetrated by aforeign object. In the
even tofas udden loss of pressure, bring the
vehicl etoah altbyb raking carefully. Avoid
abrupt stee ringmanoeuvres.
If at yrep ressur emonitor system is fitted, the
vehicle's wheels hav esensor sfitte dthat
mo nito rthe tyre pressures in all four tyres. The tyr
epressur emonitor war nsyou if the
pressur edrops in one or more of the tyres.
Th et yrep ressur emonitor only fu nctionsif
the cor respondin gsensor sare fitte dtoall
wheels.
Information on tyr epressures is displayed in
the multifunctio ndisplay .After afew minutes
of driv ing, the curren ttyre pressure of each
tyre is sho wn inthe multifunction display.
Th et yre pressure values indicated by the on-
board computer may differ from thos emeas-
ured at afilling station using apressure
gauge. Th etyre pressures shown by the on-
board computer refer to thos emeasured at
sea level. At high altitudes, the tyr epressure
values indicated by apressure gaug eare
higher than thos eshown by the on-board
computer. In this case ,donot reduce the tyre
pressures.
The operation of the tyr epressure monitor
can be affecte dbyinterference from radio
transmitting equipment (e.g .radio head-
phones ,two-way radios) that may be being
operated in or near the vehicle.
Checking tyr epressure electronically X
Make sure that the key is in posi-
tion 2(Ypage 159) in the ignitio nlock.
X Press the =or; button on the steer-
ing wheel to select the Serv. menu.
X Press the 9or: button to select
Tyre pressure .
X Press the abutton.
The curren ttyre pressure for each wheel
will be displayed in the multifunction dis-
play.
If the vehicle has been parked for longe rthan
20 minutes ,the Tyre pressures will be
displaye
dafter afew minutes of driving message appe
ars.
After ateach-in period, the tyr epressure
monito rautomatically recognises new
wheel sornew sensors. As long as aclear
allocation of the tyre pressure values to the
individual wheels is not possible ,the Tyre 402
Ty
re pressureWheel sand ty res

Storing wheels
Stor ewheels that ar enot being used in acool,
dry and preferably dar kplace. Protect the
tyres against oil, grease, petrol and diesel. Cleaning the wheels
G
WARNING
The water jet of circular-jet nozzles (dirt grind-
ers) can cause damage not visible from the
outside to tyres or chassis components. Com-
ponent sdamaged in this way can unexpect-
edly fail. There is arisk of an accident.
Do not use high-pressure cleaners with circu-
lar-jet nozzles to clean the vehicle. Have dam-
aged tyres or chassis components replaced
immediately. Fitting
awheel
Preparing the vehicle X
Vehi cles with an emergency spare
wheel: whenfitting the emergenc yspare
wheel in the even tofaflat tyre, observe the
addi tional note sonvehicl epreparation
under "Flat tyre" (Y page 378).
X Pa rk th evehicle on firm, non-slippery and
level ground.
X Unload heavy luggage.
X Engage the electric parking brak eman-
ually.
X Bring the front wheels into the straight-
ahead position.
X Shift the transmission to position P.
X Switch off the engine.
X Vehicles without KEYLESS-GO: remove
the key from the ignition lock.
X Vehicles with KEYLESS-GO: open the
driver' sdoor.
The on-boar delectronic shave status 0,
which is the same as the key having been
removed. X
Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
(Y page 159).
X If included in the vehicle equipment, take
the tyre-change tool kit out of the vehicle.
X Secure the vehicle to prevent it from rolling
away.
i Apart from some country-specific var-
iants, vehicles are not equipped with tyre-
changing tools .For mor einformation on
which tool sare require dtop erform awheel
change on your vehicle, consult a
Mercedes-Ben zService Centre.
Required tyre-cha nging tools could be, for
example:
R jack
R wheel chock
R wheel wrench
Securing the vehicle against rolling
away If your vehicle is equipped with
awheel choc k,
it can be found in the tyre-change tool kit
(Y page 377).
The folding wheel chock is an additional
securing measure to prevent the vehicle from
rolling away, for example when changing a
wheel.
X Fold both plates upwards :.
X Fold out lower plate ;.
X Guide the lugs on the lower plate fully into
the openings in base plate =. Changing
awheel
405Wheels and tyres Z

Securing the vehicle on level ground
X
On level ground: place chocks or oth er
su itabl eitem sunder the front and rea rof
the whee lthat is diagonally opposite the
whee lyou wish to change. Securing the vehicle on slight downhill gradients
X On ligh tdownhill gradients: place
chocks or other suitabl eitems in front of
the wheels of the front and rear axle.
Raisin gthe vehicle G
WARNING
If you do not positio nthe jac kcorrectly at the
appropriate jackin gpoint of the vehicle, the
jac kc ould tip over with the vehicle raised.
There is arisk of injury.
Only position the jack at the appropriate jack-
ing point of the vehicle. The base of the jack
must be positioned vertically, directly under
the jackin gpoint of the vehicle.
! AMG vehicles equipped with the
"Minispare" emergency spare wheel:
Use the "Minispare" emergency spare wheel
only on th erear axle.Ift he
"Minispare" emergenc yspare wheel is
mounted on the front axle, it could damage
the brak esystem.
If at yre on the front axle is faulty, an intact
whee lfrom th erear axle must first be
replaced by the "Minispare" emergency
spare wheel. The faulty tyr eonthe front
axl es hould then be replaced by the intact
tyr efrom th erear axle.
Be sure to observ ethe instruction label on
the "Minispare" emergenc yspare wheel.
The following must be observed when raising
the vehicle:
R to raise the vehicle, only use the vehicle-
specifi cjack that has been tested and
approved by Mercedes-Benz .Ifthe jac kis
used incorrectly, it could tip over while the
vehicle is raised.
R the jack is designed only to raise and hold
the vehicle for ashort tim ewhile awheel
is being changed. It is not suited for per-
forming maintenance wor kunder the vehi-
cle.
R avoid changing the wheel on uphil land
downhil lslopes.
R before raising the vehicle, secure it from
rolling away by applying the parkin gbrake
and inserting whee lchocks. Never disen-
gage the parkin gbrake whil ethe vehicle is
raised.
R the jac kmust be placed on afirm ,flat and
non-slip surface. On aloose surface, a
large, load-bearing underlay must be used.
On aslippery surface, anon-slip underlay
must be used, e.g. rubber mats.
R do not use wooden block sorsimilar
objects as ajack underlay .Otherwi se,the
jack wil lnot be able to achiev eits load-
bearing capacity due to the restricted
height.
R mak esure that the distanc ebetween the
underside of the tyr es andthe grou nddoes
not exceed 3cm. 406
Changing
awheelWheels and tyres

An emergency spare whee
lmayalso be fitted
against the direction of rotation. Observe the
time restrictio nonuse as well as the speed
limitation specified on the emergenc yspare
wheel.
Replace the tyres after six year satthe latest,
regardless of wear .This also applies to the
emergenc yspare wheel.
i When you are driving with the collapsible
emergency spare wheel fitted, the tyre
pressur eloss warnin gsystem or the tyre
pressure monitor cannot function reliably.
Only restart the tyre pressure los swarning
system/tyre pressure monitor when the
defective wheel has been replaced with a
new wheel.
Vehicles with tyre pressure monitor:
after mounting an emergency spare wheel,
the system may still displ aythe tyre pres-
sure of the removed whee lfor afew
minutes. The value displayed for the moun-
ted emergency spare wheel is not the same
as the curren ttyre pressure of the emer-
gency spare wheel. Removin
gthe emergenc yspare wheel Emergency spare wheel (example: vehicl
ewithout
lockable luggage compartment floor)
: Emergenc yspare wheel retainer
; Stowage tray
= "Minispare" emergency spare wheel
The "Minispare" emergency spare wheel can
be foun dinthe stowage well under the lug-
gage compartment floor. X
Lift the luggage compartment floor up
(Y page 344).
X Vehicle swithalockable luggage com-
partment floor: remove the stowage tray.
X Release the Velcro fastener ( Ypage 37 7).
X Remove the warning triangle and jack.
X Turn emergenc yspare wheel retainer :
anti -clockwise and remov eit.
X Remove stowage well ;.
X Remove "Minispare" emergency spare
wheel =. In vehicle
swithaBang &Olufsen sound sys-
tem ,the "Minispare" emergency spar ewheel
is stored in abag. The bag is secured to the
lashing eyelets in the boot.
To stow the "Minispare" emergency spare
wheel, the rear seats in the thir drow must be
folde din( Ypage 10 5).
X To remove th eemergency spare
wheel: openthe tailgate.
X Loosen tensioning straps ;on bot hsides.
X Unhook retainin gsprin ghooks :and =
on tensioning straps ;from the lashing
eyelets.
X Remov ethe bag with the "Minispare" emer-
genc yspare wheel.
X Open the bag and remove the "Minispare"
emergency spare wheel.
X To stow the emergency spar ewheel:
place th e"Minispare" emergenc yspare
wheel in the bag and close the bag.
X Place the bag with the "Minispare" emer-
gency spare wheel in the boot. Emergency spar
ewheel
415Wheels and tyres Z