2012 MERCEDES-BENZ GL SUV engine

Stopping th
eRACETIMER X
Press the %button on the steering
wheel.
X Press ato confirm Yes .
The RACETIMER interrupts timing when you
stop the vehicle and turn the key to position
1 in the ignition lock. When you turn the key
to position 2or 3and then press ato
confirm Start ,t
iming is continued.
Resetting the current lap
X Stop the RACETIMER.
X Press =or; to select ResetLap .
X Press ato reset th elap time to "0".
Deleting all laps If you switch off the engine, the RACETIMER
is reset to "0" after 30 seconds
.All laps are
deleted.
You cannot delete individual stored laps. If
you have stopped 16 laps, the current lap
does not have to be reset.
X Reset the current lap.
X Press ato confirm Reset .
Rese tRace Timer? appe
arsint he multi-
func tion display.
X Press the :button to select Yes and
press the abutton to con firm.
All laps are deleted. Overall evaluation
:
RACETIMER overall evaluation
; Tota ltime driven
= Average speed
? Distanc ecovered
A Maximum speed
This func tion is shown if you have stored at
least one lap and stopped the RACETIMER.
X Press the =or; button on the steer-
ing wheel to select the AMG menu.
X Press the 9button repeatedly until the
overall evaluation is shown.
Lap evaluation :
Lap
; Lapt ime
= Average lap speed
? Lap length
A Top speed during lap 288
Menus and submenusOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
!
Pa
rking brake inop‐
erative Th
ey ellow !warning lamp lights up. The red !indicator
lamp flashes fo rabout ten seconds after the electric parkin gbrake
ha sb een applied or released. It then goes out or remains lit.
The electric parkin gbrake is malfunctioning ,e.g. because of over-
voltag eorundervoltage.
X Remove the cause for the overvoltage or undervoltage ,e.g. by
charging the battery or restarting the engine.
X Appl yorr elease the electric parkin gbrake.
If it remains impossibl etoapply or release the electric parking
brake:
X Swit choff the ignition and tur nitback on.
X Apply or release the electric parkin gbrake.
If th eelectric parkin gbrake can stil lnot be released:
X Consult aqualified specialist workshop. The display messag
eisonly shown whil ethe vehicle is in motion.
The red !indicator lam pflashes and the yellow !warning
lamp is lit.
It is not possible to apply the electric parkin gbrake manually.
X Move th etransmission selector lever to P.
X Visit aqualified specialist workshop. !
Turn on th
eigni‐ tion to release
the parkin
gbrake Th
er ed ! indicator lam pislit.
You attempted to release the electric parkin gbrake whil ethe igni-
tion was switched off.
X Key: turnthe key to position 1in the igni tion lock.
X KEYLESS-GO: switchonthe igni tion. J
Chec
kbrake fluid level There is insufficient brake fluid in th
ebrake flui dreservoir. In addi-
tion ,the J warnin glamp in the instrument cluster lights up and
aw arning ton esounds.
G WARNING
The brakin gefficienc ymay be impaired.
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. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 181).
X Consult aqualified specialist workshop.
X Do not top up the brake fluid. This does not correct the error. 296
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
#
Ch
eckb rake pad wear Th
eb rak epads/lining shaver eached their wear limit.
X Visit aqualified specialist workshop. PR
E-SAFE inopera‐ tiv
eS ee Owner's Manual Important functio
nsof PRE-SAFE ®
hav efailed .All other occupant
safet ysystems, e.g. airbags ,remai navailable.
X Visit aqualified specialist worksho pimmediately. PRE-SAFE
Function
scur‐ rently limited See
Owner's Manual Vehicle
swithou tthe Activ eDriving Assistance package: Adaptive
Brake Assist is temporaril yinoperative. Possible causes:
R the function is impaired due to heavy rain or snow.
R the sensor in the bumper is 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 liste dabove no longer apply, the display message
goes out.
Adapti veBrake Assis tiso perational again.
If the display message 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 bumpers (Y page 370).
X Restart the engine.
X AMG vehicles: reactivate ESP ®
(Y page 67). Display messages
297On-boardcomputer and displays Z

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

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

Displa
ymessages Possible causes/consequences and
M Solutions
8
Di
fferent. locking
sys
.c oolin gdown Please wait Th
ed ifferential loc kistoo hot and has been disengaged.
X Drive on carefully.
X Allow the differential lock to cool down.
The differential lock reengages as soon as it has cooled down. LO
WR ANGE Stop Apply parking brake Ag
earshif tprocess ha sbeen can celled. LOW RANGE is in the
neutral position. There is no connection between the engine and
the driv ewheels.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to roa dand traffic conditions.
X Engag ethe electric parkin gbrake .Don ot con tinue driving under
any circumstances.
X Repe atthe gearshift process. LOW RANGE Malfunc‐
tion To park,
apply parking brake LO
WR ANGE is malfunctioning.
X Do not drive at speeds above 80 km/h.
X Whe nparking, secure the vehicle against rolling away
(Y page 181).
X Have the vehicle checked at aqualified specialist workshop. LO
WR ANGE max. 40 km/h Yo
uh ave exceeded the maximum spee dfor the gearshift process.
X Drive mor eslowly.
The gear change is made. LO
WR ANGE max. 70 km/h Yo
uh ave exceeded the maximum spee dfor the gearshift process.
X Drive mor eslowly.
The gear change is made. LOW RANGE Shift to
position
Nbriefly Yo
uh ave reduced the vehicle speed, but the automatic transmis-
sion is not in position N.
X Briefly shift the automatic transmission to position N.LOW RANGE Shifting
cancelle
dPlease reactivate Th
eg earshif tprocess ha sbeen cancelled.
X Repeat the gearshif tprocess. Ã
inoperative DSR (Downhil
lSpeed Regulation) is deactivated due to afault.
X Hav eDSRchecked at aqualified specialist workshop. Display messages
309On-boar dcomputer and displays Z