2012 MERCEDES-BENZ GL SUV brake

X
Press the 6ora button to star tdial-
ling.
or
X To exit the redia lmemory: press the
~ or% button. Assistance menu
Introduction In the
Assist. menu, you have the following
options:
R showing Speed Limit Assist and activa ting/
deactivating its message function
(Y pag e277)
R showing the distance display
(Y pag e277)
R activating/deac tivating th edistanc ewarn-
ing function (Y page 278)
R activating/deactivating PRE-SAFE ®
Brake
(Y page 278)
R activating/deactivating ATTENTION
ASSIST (Y page 278)
R activating/deactivating Blind Spot Assist
or Active Blind Spot Assis t(Y page 279)
R activating/deactivating Lan eKeeping
Assist or Active Lan eKeeping Assist
(Y page 279) Speed Limit Assist Displaying Speed Limit Assist
X
Press =or; on the steerin gwheel
to selec tthe Assist. menu.
X Press the 9or: button to select
Spee dLim. Asst. .
X Press the abutton.
Under certain conditions ,detected speed
limits are shown in the multifunction dis-
play (Y page 233).
Activating/deac tivating th eSpeed Limit
Assist message function
X Press =or; on the steering wheel
to select the Assist. menu.
X Pres sthe 9 or: button to select
Spee dLim. Asst. .
X Press the abutton.
Th em ultifunction display shows Speed
Limit Assis t.
X Press the :button.
The curren tselection is displayed.
X To activate or deactivate: pressa.
If the Speed Limit Assist message fun ction
is activated, adetected speed limi tisauto-
matically displayed for five seconds. Other
items in the multifunction display are not
shown during this time.
If Speed Limit Assis tiso perational and the
message fun ction is activated, the multifunc-
tion display shows the Äsymbol when the
ignition is switched on.
Showing the distance display X
Press =or; on the steering wheel
to select the Assist. menu.
X Press the 9or: button to select
Distan cedisplay .
X Press the abutton.
The DI STRONIC PLUS distance display
appears in the multifunction display
(Y page 205). Menus and submenus
277On-board computer and displays Z

If the
Sensors deactivated messa
ge
appears, the radar senso rsystem is deacti-
vated.
X Check whether or not the radar sensor sys-
tem is permitted to be activated
(Y page 433).
X Switc honthe radar sensor system
(Y page 28 3).
Activating/deactivating distance warn-
ing function X
Press =or; on the steering wheel
to select the Assist. menu.
X Press 9or: to select Dist. warn‐
ing .
X Press the abutton.
The curren tselection is displayed.
X To activate/deac tivate: press the a
button again.
When the distanc ewarning function is acti-
vated, the multifunction display shows the
Ä symbol if the HOLD function is not acti-
vated (Y page 211).
Vehicles with Active Parking Assist: if
PARKTRONIC is activated and you are driving
at as peed under 35 km/h, the jActive
Parkin gAssist symbol is shown instead of the
Ä symbol ( Ypage 21 9).
Further information on the distance warning
function (Y page63).
Activating/deactivatin gPRE-SAFE ®
Brake PRE-SAFE
®
Brake is only available in vehicles
with DISTRONIC PLUS.
X Press =or; on the steering wheel
to select the Assist. menu.
X Pres sthe 9 or: button to select
PRE-SA FEBrake .X
Press the abutton.
The curren tselection is displayed.
X To activate/deac tivate: press the a
button again.
When PRE-SAFE ®
Brak eisa ctivated, the mul-
tifunction displa yshows the Äsymbol as
long as the HOL Dfunction is not activated
(Y page 211).
Vehicles with Active Parking Assist: if
PARKTRONIC is activated and you are driving
at as peed under 35 km/h, the jActive
Parkin gAssist symbol is shown instead of the
Ä symbol ( Ypage 21 9).
If the PRE-SA FEBrake: Sensors deacti‐ vated message appears
,the radar sensor
system is deactivated.
X Chec kwhether or not the radar sensor sys-
tem is permi tted to be activated
(Y page 43 3).
X Switch on the radar senso rsystem
(Y page 283).
For more information on PRE-SAFE ®
Brake,
see (Y page 68).
Activating/deactivating ATTENTION
ASSIST X
Press =or; on the stee ring wheel
to select the Assist. menu.
X Pres sthe 9 or: button to select
Attent ionA sst. X
Press the abutton.
The curren tselection is displayed.
X To activate/deac tivate: press the a
button again.
When ATTENTION ASSI STis activated, the
À symbol appears in the multifunction
display when the ignition is on.
For further information about ATTENTION
ASSIST, see (Y page 232).278
Menus and submenusOn-boar
dcomputer and displays

Safety systems
Display messages Possible causes/consequences and
M Solutions
!÷
currentl
yunavail‐ able See Owner's
Manual ABS (Anti-loc
kBraking System) ,ESP ®
(Electronic Stability Pro-
gram), BAS (Brake Assist), PRE-SAFE ®
,t he HOL Dfunction, hill
start assist, crosswind driving assistance and ESP ®
trailer stabili-
sation are temporarily not available.
The adaptive brake lights ,COLLISION PREVENTION AS SIST, BAS
PLUS and PRE-SAFE ®
Brake may als ohave failed.
In addition, the ÷,åand! warning lamps light up in
the instrumen tcluster.
ATTENTION ASSIST is deactivated.
Possible causes:
R self-diagnosis is not yet complete.
R the on-board voltage may be insufficient.
G WARNING
The brake system continues to func tion normally, but withou tthe
func tions listed above. The wheels coul dtherefore lock if you
brake hard, for example.
The steerability and brakin gcharacteristics ma ybeseverely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unabl etos tabilise the vehicle.
The dange rofskidding and having an accident increases.
X Carefull ydrive on asuitable stretch of road, making slight steer-
ing movement sataspeed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit aqualified specialist workshop. !÷
inoperativ
eSee Owner's Manual ABS, ESP
®
,B AS ,PRE-SAFE ®
,t he HOL Dfunction, hill start assist,
crosswind driving assistance and ESP ®
trailer stabilisation are not
available due to amalfunction.
The adaptive brake lights ,COLLISION PREVENTION AS SIST, BAS
PLUS and PRE-SAFE ®
Brake may als ohave failed.
In addition, the J,÷,åand! warning lamps light
up in the instrumen tcluster.
ATTENTION ASSIST is deactivated.
G WARNING Display messages
291On-board computer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
The brak
esystem con tinues to function normally, but without the
function slisted above. The wheels could therefore loc kifyou
brake hard ,for example.
The steerabilit yand braking characteristics may be severely affec-
ted. The braking distance in an emergenc ybraking situatio ncan
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilis ethe vehicle.
The danger of skidding and having an accident increases.
X Drive on carefully.
X Visit aqualified specialist worksho pimmediately. ÷
currentl
yunavail‐ able See Owner's
Manual ESP
®
,B AS, PRE-SAFE ®
,t he HOL Dfunction, hill start assist, cross-
wind driving assistance and ESP ®
trailer stabilisatio nare not avail-
ab ledue to amalfunction.
The adaptive brake lights, COLLISION PREVENTION ASSIST, BAS
PLUS and PRE-SAFE ®
Brake may als ohave failed.
In addition, the ÷andå warning lamp slight up in the
instrument cluster.
The self-diagnosi sfunction may not be complete, for example.
ATTENTION ASSIS Tisd eactivated.
G WARNING
The brak esystem continues to function normally, but witho utthe
functions listed above. Th ewheels could therefor elock if you
brake hard ,for example.
The brakin gdistance in an emergenc ybraking situatio ncan thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilis ethe vehicle.
The danger of skidding and having an accident increases.
X Carefully drive on asuitable stretc hofroad, makin gslight steer-
ing movement sataspeed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit aqualified specialist workshop. 292
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
÷
in
operative See Owner'
sManual ESP
®
,B AS, PRE-SAFE ®
,t he HOL Dfunction, hill start assist, cross-
wind driving assistance and ESP ®
trailer stabilisatio nare not avail-
ab ledue to amalfunction.
The adaptive brake lights, COLLISION PREVENTION ASSIST, BAS
PLUS and PRE-SAFE ®
Brake may als ohave failed.
In addition, the ÷andå warning lamp slight up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but withou tthe
func tions listed above. The wheels coul dtherefore lock if you
brake hard, for example.
The brakin gdistance in an emergenc ybraking situatio ncan thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilis ethe vehicle.
The danger of skidding and having an accident increases.
X Drive on carefully.
X Visit aqualified specialist workshop. T!
÷
inoperativ
eSee Owner's Manual EBD (electroni
cbrake force distribution) ,ABS ,ESP ®
,B AS ,PRE-
SAFE ®
,t he HOL Dfunction, hill start assist, crosswind driving
assistance and ESP ®
trailer stabilisation are not available due to
am alfunction.
The adaptive brake lights ,COLLISION PREVENTION AS SIST, BAS
PLU Sand PRE-SAFE ®
Brake may also have failed.
In addition, the ÷,åand! warning lamps light up in
the instrument cluster and awarnin gtones ounds.
ATTENTION ASSI STis deactivated.
G WAR
NING
The brake sys temc ontinues to fu nction normally, but without the
function slisted above. The wheels could therefore lock if you
brak ehard, for example.
The steerabilit yand braking characteristics may be seve rely affec-
ted. The braking distanc einanemergency braking situation can
increase.
If ESP ®
is not opera tional, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and havi ngan accident increases.
X Drive on carefully.
X Visit aqualified specialist worksho pimmediately. Display mess
ages
293On-board computer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
!
Re
leasep arking brake Th
er ed ! indicato rlamp flashes and awarning ton esounds.
Ac onditio nfor aut omatic relea se of theelectric parking brak eis
not fulfilled (Y page182).
You are driving wit hthe electric parking brak eapplied.
X Releas ethe electric parking brak emanually. The red
!indicator lamp flashes and awarning ton esounds.
You ar emaking an emergenc ystopu singthe electric parking
brak e(Ypage 182). !
Pa
rkingb rake See Owner'
sManual Th
ey ellow !warning lamp light sup.
The electric parking brak eismalfunctioning.
To apply:
X Switch th eignition off.
X Press th eelectric parking brak ehandle for at least ten seconds.
X Move the transmission selector lever to P.
X Consul taqualified specialist workshop. The yellow
!warning lamp and the red !indicator lamp
are lit.
The electric parkin gbrake is malfunctioning.
To release:
X Switch off th eignition and tur nitback on.
X Release the electric parkin gbrake manually.
or
X Releas ethe electric parkin gbrake automaticall y(Ypage 18 2).
If the electric parking brake can still not be released:
X Do not drive on.
X Consul taqualified specialist workshop. 294
Display messagesOn-boar
dcomputer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
The red
!indicato rlamp flashes and the yellow !warning
lamp is lit.
The elect ricp arking brak eismalfunctioning.
To release:
X Switch off the ignition and tur nitback on.
X Release the elect ricp arking brak emanually.
To apply:
X Switch off the ignition and tur nitback on.
X Engage the elect ricp arking brak emanually.
If the red !indicator lamp con tinues to flash:
X Do not driv eon.
X Secure the vehicle agai nstrolling away ( Ypage 405).
X Mov ethe transmissio nselecto rlever to P.
X Turn the fron twheels towards the kerb.
X Consult aqualified specialist workshop. The yellow
!warning lamp lights up. The red !indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released .Itthen goes out or remain slit.
The electric parkin gbrake is malfunctioning.
X Switch off th eignition and tur nitback on.
X Engage the electric parking brake.
If it is not possible to apply the electric parking brake:
X Move the transmission selector lever to P.
X Visit aqualified specialist workshop.
If it is not possible to release the electric parking brake:
X Release the electric parking brake automatically (Y page 182).
If the electric parking brake can still not be released:
X Consult aqualified specialist workshop. The yellow
!warning lamp lights up. If you manually apply or
release the electric parking brake, the red !indicator lamp
flashes.
The electric parking brake is malfunctioning. It is not possible to
apply the electric parking brake manually.
X Move the transmission selector lever to P.
X Visit aqualified specialist workshop. Display messages
295On-board computer and displays Z

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