ESP inoperative MERCEDES-BENZ GL SUV 2012 Owners Manual

Important safety notes
If you fail to adapt your driving style or
become distracted, th edriving sa fetysys-
tems ca nneith er reduce th erisk of accident
no ro verri dethe law sofphysics. Driving
safety system sare mere ly aids desig nedto
assis tdrivi ng.You ar eresponsible for the dis-
tance to the vehicle in fr ont, forvehicle speed
and for braking in good time. Alway sadapt
your drivin gstyle to suit the prevailing road
and weather condition sand maintain asafe
distance from the vehicle in front .Drive care-
fully.
i Thed riving safet ysystems described only
work as effectively as possibl ewhen there
is adequate con tact betwee nthe tyres and
the roa dsurface. Pleas epay special atten-
tion to the notes on tyres, recommended
minimum tyre tread depths ,etc.
(Y page 396).
In wintry driving conditions, always use
winter tyres (M+S tyres) and if necessary,
snow chains .Only in this way will the driv-
ing safety systems described in this section
work as effectively as possible. ABS (Anti-lock Braking System)
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page61). G
WARNING
If ABS is faulty, the wheels could lock when
braking .The steerability and brakin gcharac-
teristics ma ybeseverely impaired. Addition-
ally, further driving safet ysystems are deac-
tivated. There is an increased danger of skid-
ding and accidents.
Drive on carefully. Have ABS checked imme-
diatel yata qualified specialist workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the infor mation on the ABS warning lamp (Y
page 326) and
display messages which may be shown in the
instrument cluster (Y page 291).
ABS regulate sbrake pressure in such away
that the wheels do not lock when you brake.
This allows you to continue steering the vehi-
cle when braking.
ABS works from aspeed of about 8km/h
upwards, regardless of road-surfac econdi-
tions. AB Sworksons lippery surfaces, even
when you only brake gently.
The yellow !ABS warnin glamp in the
instrument cluster lights up when the ignition
is switched on. It goes out when the engine is
running.
Brakes X
If ABS intervenes: continue to depress the
brake pedal with force until the braking sit-
uation is over.
X To mak eafull brake application:
depress th ebrake peda lwith full force.
If ABS intervenes when braking, you will feel
ap ulsing in the brake pedal.
The pulsating brake pedal can be an indica-
tion of hazardous road conditions, and func-
tions as areminder to take extr acare while
driving.
Off-road ABS An ABS system specifically suited to off-road
terrain is activated automatically once the off-
road program is activated on:
R
Vehicles without the ON&OFFROAD pack-
age (Y page 252)
R Vehicles with the ON&OFFROAD package
(Y page 253)
At speeds below 30 km/h, the front wheels
lock cyclically during braking. The digging-in
effect achieved in the process reduces the
stopping distance when driving off-road. This
limits steering capability. Driving safety systems
61Safety Z

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

Displa
ymessages Possible causes/consequences and
M Solutions
Blind Spot Assis
torActive Blind Spo tAssist is temporarily inop-
erative. Possible causes:
R the sensors are dirty.
R the function is impaired due to heavy rain or snow.
R the radar senso rsystem is outside the operating temperature
range.
R the radar sensor syste mistemporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
The yellow 9indicator lamps also light up in the exterior mir-
rors.
When the causes listed above no longer apply ,the displa ymes-
sage goes out.
Blin dSpot Assist or Active Blin dSpot Assist is operational 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 sensors (Y page 370).
X Restart the engine. Blin
dSpot Assist inoperative
Active Blind Spot
Assist inoperative Blind Spot Assist or Active Blind Spot Assist is faulty.
Th
ey ellow 9indicator lamps also light up in the exterior mir-
rors.
X Visit aqualified specialist workshop. Park Assist cancel‐
led The driver'
sdoor is open and the driver's seat belt has not been
fastened.
X Repeat the parkin gprocess wit hthe seat belt fastened and the
driver's door closed. You hav
einadvertently touched the multifunction steerin gwheel
while steerin gintervention was active.
X While steerin gintervention is active, make sure not to touch the
multifunction steerin gwheel. The vehicle has star
tedtos kid and ESP ®
has intervened.
X Use Active Parking Assist again later (Y page 219).312
Display messagesOn-board computer and displays

Tyres
Display messages Possible caus
es/consequences andM Solutions
Tyre pressure
Check tyres Th
et yre pressure loss warning system ha sdetected asignif icant
loss in pressure.
Aw arning ton ealso sounds.
G WARNING
Wit htyrep ressures which are too low, there is arisk of the fol-
lowing hazards:
R they ma yburst, especiall yasthe load and vehicle speed
increase.
R they ma ywear excessively and/or unevenly, which may greatly
impair tyr etraction.
R thed riving characteristics, as well as steering and braking, may
be greatl yimpaired.
There is arisk of an accident.
X Stop the vehicle without makin gany sudden steering or braking
manoeuvres .Pay attention to the traffic conditions as you do
so.
X Secure the vehicle against rolling away (Y page 181).
X If there is aflat tyre, inspect the tyres (Y page 378).
X Check the tyre pressures and, if necessary, correct the tyre
pressure.
X Restart the tyre pressure loss warnin gsystem when the tyre
pressure is correct (Y page 401).Check tyr
epres‐ sures then restart
Run Flat Indicator Th
et yre pressure los swarning system generated adispla ymes-
sage and has not been restarted since.
X Set the cor rect tyre pressure in all four tyres.
X Restart the tyre pressure los swarning system (Y page 401). Run Flat Indica
tor inoperative Th
et yre pressure los swarning system is faulty.
X Visit aqualified specialist workshop. Tyre pressu
re will
be displayed after
driving
afew minutes Th
et yre pressure monitor is measuring the tyre pressure.
X Driv eon.
The tyre pressures appear in the multifunction display after you
have bee ndriving for afew minutes. Tyre press. moni‐
to
ri noperative Th
et yre pressure monitor is faulty.
X Visit aqualified specialist workshop. Display messages
315On-board computer and displ ays Z

Displa
ymessages Possible causes/consequences and
M Solutions
Ty
re press. moni‐ tor inoperative No
wheel sensors Th
ew heels fitte ddonot have asuitable tyr epressure se nsor.T he
tyr ep ressure monito risd eactivated.
X Fit wheels with suitable tyr epressure sensors.
Th et yre pressure monitor is activated automatically after driv-
ing for afew minutes. Chec
ktyre(s) Th
et yre pressure in one or more tyres has droppe dsignificantly.
The wheel position is displayed in the multifunction display.
Aw arning ton ealso sounds.
G WARNING
Wit htyrep ressures which are too low, there is arisk of the fol-
lowing hazards:
R they ma yburst, especiall yasthe load and vehicle speed
increase.
R they ma ywear excessively and/or unevenly, which may greatly
impair tyr etraction.
R thed riving characteristics, as well as steering and braking, may
be greatl yimpaired.
There is arisk of an accident.
X Stop the vehicle without makin gany sudden steering or braking
manoeuvres .Pay attention to the traffic conditions as you do
so.
X Secure the vehicle against rolling away (Y page 181).
X If there is aflat tyre, inspect the tyres (Y page 378).
X Check the tyre pressure (Y page 402).
X If necessary, correct the tyre pressure. 316
Display messagesOn-board computer and displays