warning lights MERCEDES-BENZ GL 2012 Service Manual
[x] Cancel search | Manufacturer: MERCEDES-BENZ, Model Year: 2012, Model line: GL, Model: MERCEDES-BENZ GL 2012Pages: 384, PDF Size: 15.71 MB
Page 207 of 384
Activating/deactivating DSR
Activating
DSR can only be activated if you are driving
no faster than 20 mph (30 km/h).
Vehicle without the Off-Road Pro Engineering
package
Vehicle with the Off-Road Pro Engineering package
XPress button :.
Indicator lamp ; lights up.
The DSR symbol and a message, such as the
following, appear in the multifunction display:
If the speed that is being driven is too high,
the DSR symbol and the Max. speed
20 mph (Canada: 30 km/h) message appears
in the multifunction display.
DeactivatingXPress button :.
Indicator lamp ; goes out.
The DSR symbol appears in the
multifunction display with the Off
message.
DSR is deactivated automatically if you are
driving faster than 21 mph (Canada:
35 km/h). The DSR symbol appears in the
multifunction display with the Off message.
You also hear a warning tone.
Changing the set speed while
the vehicle is in motion
When DSR is activated, the control speed can
be changed to a value between 3 mph and
10 mph (Canada: between 4 km/h and
18 km/h) during the journey.
XTo increase or decrease in 1 mph
(Canada: 1 km/h) increments: press the
cruise control lever to the point of
resistance briefly upwards : for a higher
control speed or briefly downwards ; for
a lower control speed.
The set value appears in the multifunction
display.XTo increase or decrease in 5 mph
(Canada: 10 km/h) increments: push the
cruise control lever beyond the point of
resistance briefly upwards : for a higher
control speed or briefly downwards ; for
a lower control speed.
The set value appears in the multifunction
display.Off-road driving systems205Driving and parkingZ
Page 208 of 384
Off-road drive program
i The off-road drive program is available
only in vehicles without the Off-Road Pro
engineering package.
The off-road drive program assists you in
driving off-road. The engine’s performance
characteristics and the gearshifting
characteristics of the automatic transmission
are adapted for this purpose. ABS, ESP ®
and
4 ETS programs especially adapted to off-
road driving are also activated.
Do not use the off-road drive program on
roads that are covered in snow or icy or if you
have installed snow chains on your vehicle.
For information about driving off-road, see
( Y page 174).XTo activate: press off-road button :.
Indicator lamp ; lights up. Off-road
indicator = appears in the multifunction
display.XTo activate: press off-road button :.
Indicator lamp ; and off-road indicator
= go out.LOW RANGE off-road gear
General notes
The LOW RANGE off-road gear assists you in
driving off-road and when fording. When LOW
RANGE is engaged, the engine’s performance
characteristics and the gearshifting
characteristics of the automatic transmission
are adapted for this purpose. ABS, ESP ®
and
4 ETS programs especially adapted to off-
road driving are also activated.
Information on "Off-road driving"; see
( Y page 174) . You will find information about
driving safety systems in conjunction with
LOW RANGE in the "Safety" section
( Y page 67).
Shift ranges
HIGH RANGERoad position for all
normal driving situationsLOW RANGEOff-road position for
driving off-road and
fording
The gear ratio between the
engine and wheels is only
approximately one third of
that in the HIGH RANGE
road position. The drive
torque is correspondingly
higher as a result.
Do not use LOW RANGE:
R on slippery road
surfaces, e.g. in the case
of slush
R on snow or ice-covered
roads
R if you have snow chains
on your vehicleGWARNING
Always wait until the procedure of shifting
from HIGH RANGE to LOW RANGE – and from
LOW RANGE to HIGH RANGE – has been
entirely completed. During this procedure do
206Off-road driving systemsDriving and parking
Page 209 of 384
not turn off the engine or shift the automatic
transmission into another gear.
If you do not wait until the shifting procedure
has been entirely completed then it might not
be correctly performed. The transfer case
might be in neutral, thus interrupting the
transfer of power between the engine and the
drive axle.
The vehicle is then freely movable, even if a
gear has been selected, and could
unintentionally be set into motion –
particularly on up – or downhill grades. This
could lead to an accident and cause injury to
yourself and others.
Please observe related messages appearing
in the multifunction display.
From HIGH RANGE to LOW RANGE
! Only carry out the gear change process if:
R the engine is running
R the transmission is in position N
R you are not driving faster than
25 mph (40 km/h)
XPress LOW RANGE button :.
Indicator lamp ; flashes. LOW RANGE
indicator = appears in the multifunction
display.When the gear change is complete,
indicator lamp ; lights up.
While indicator lamp ; is flashing, you can
cancel the gear change by pressing LOW
RANGE button : again.
From LOW RANGE to HIGH RANGE
! Only carry out the gear change process if:
R the engine is running
R the transmission is in position N
R you are not driving faster than 43 mph
(70 km/h)
XPress LOW RANGE button :.
Indicator lamp ; flashes.
If the gear change process has taken place,
indicator lamp ; and LOW RANGE
indicator = in the multifunction display go
out.
While indicator lamp ; is flashing, you can
cancel the gear change by pressing LOW
RANGE button : again.
Messages in the multifunction display
If a gear change process has not been
successful, the following messages may be
displayed in the multifunction display:
Drive max. 25 mph (Canada: 40 km/h): You
have driven faster than 25 mph (40 km/h).
Indicator lamp ; also flashes.
XDrive more slowly to carry out the gear
change process.
Briefly engage gear N : The transmission
is in position D and you are now driving below
25 mph (40 km/h).
XShift the transmission to N to complete the
gear change process.
Shifting process canceled
Reactivate : The shifting process has not
been completed.
XMaintain all gear change conditions and
carry out the gear change process again.
Stop vehicle Apply parking brake : A
warning tone is also heard. The gear change
Off-road driving systems207Driving and parkingZ
Page 211 of 384
lost and steering would no longer be possible.
The differential locks must therefore only be
activated off-road and only if activating the
other driving systems (4ETS, ESP ®
and LOW
Range off-road gear) is no longer sufficient.
Engaging the differential locks
! Pull away slowly when the differential
locks are activated.
Function or performance tests may only be
performed on a 2-axle dynamometer. If you
wish to operate the vehicle on such a
dynamometer, please consult an
authorized Mercedes-Benz Center
beforehand. You could otherwise damage
the drive train or the brake system.
Automatic mode
Use automatic mode ; for all driving
situations, including driving off-road or when
fording.
In automatic mode, the differential locks are
engaged and disengaged according to driving
requirements. This guarantees sufficient
traction for most driving situations with
unrestricted vehicle steerability.
XStart the engine.
The differential locks are in automatic
mode. The indicator lamp in selector
wheel : lights up above symbol for
automatic mode ;.Engaging manuallyGWARNING
Never drive on a paved surface with the center
and rear axle differential locks manually
engaged. Ability to steer the vehicle is greatly
reduced when the differential locks are
manually engaged, increasing the risk of an
accident.
For safety reasons, the locks are
automatically released at a vehicle speed
above 31 mph (50 km/h). Nevertheless, you
should only manually lock the differential if
absolutely necessary because engaged locks
will restrict the vehicle drivetrain while
cornering and cause the vehicle to chatter.
This could cause you to lose control of the
vehicle and cause an accident.
! The differential locks must not be
activated when the vehicle is being towed
or while the wheels are spinning.
Only engage the differential locks manually if
traction in automatic mode is insufficient.
The differential locks can be activated
manually up to a speed of 19 mph
(30 km/h).
XStart the engine.XTurn selector wheel : to desired position
= or ?.
The indicator lamp in selector wheel :
lights up at the corresponding symbol.
The engaged differential appears in the
multifunction display:
AThe differential lock for the transfer case
is locked.
If you have not previously selected the off-
road menu ( Y page 222) in the on-board
Off-road driving systems209Driving and parkingZ
Page 238 of 384
Display messagesPossible causes/consequences and M Solutions$ (USA
only) ! (Canada
only)
Release Parking
BrakeYou are driving with the parking brake applied. A warning tone also
sounds.XRelease the parking brake$ (USA
only) J (Canada
only)
Check Brake Fluid
LevelGRisk of accident
There is not enough brake fluid in the brake fluid reservoir.
Additionally, the red $ (USA only)/ J (Canada only)
warning lamp lights up in the instrument cluster and a warning
tone sounds.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XEngage the parking brake.XConsult a qualified specialist workshop.XDo not add brake fluid. This will not correct the malfunction.GWARNING
Driving with the message Check Brake Fluid Level displayed can result in an accident. Have
your brake system checked immediately.
Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be
seriously burned.
Display messagesPossible causes/consequences and M SolutionsG
Tele Aid
InoperativeUSA only: one or more of the main functions in the mbrace system
are malfunctioning.
Canada only: one or more of the main functions of the TELEAID
system are malfunctioning.XUSA only: have the mbrace system checked at a qualified
specialist workshop.XCanada only: have the TELEAID system checked at a qualified
specialist workshop.PRE-SAFE
Inoperative See
Operator's ManualGRisk of injury
Important functions of PRE-SAFE ®
have failed. All other occupant
safety systems, e.g. air bags, remain available.
XVisit a qualified specialist workshop immediately.236Display messagesOn-board computer and displays
Page 243 of 384
GWARNING
If the 42 indicator lamp remains lit with an adult occupant on the front-passenger
seat even after performing the above corrective steps, do not have any passenger use the front-
passenger seat until the system has been repaired.
Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed.
Display messagesPossible causes/consequences and M Solutionsb
Cornering Lamp
Left or Cornering
Lamp RightThe left or right-hand cornering light is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 123).
or
XVisit a qualified specialist workshop.b
Low Beam Left
or Low Beam RightThe left or right-hand low-beam headlamp is defective.b
Trailer Tail Lamp
Left or Trailer
Tail Lamp RightThe left or right-hand trailer tail lamp is faulty.XCheck whether you are permitted to change the bulb yourself.
or
XVisit a qualified specialist workshop.b
Trailer Turn
Signal Left or
Trailer Turn
Signal RightThe left or right-hand trailer turn signal lamp is defective.XCheck whether you are permitted to change the bulb yourself.
or
XVisit a qualified specialist workshop.b
Trailer Brake LampThe trailer brake lamp is defective.XCheck whether you are permitted to change the bulb yourself.
or
XVisit a qualified specialist workshop.b
Turn Signal Rear
Left or Turn Signal
Rear RightThe rear left-hand or rear right-hand turn signal is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 123).
or
XVisit a qualified specialist workshop.Display messages241On-board computer and displaysZ
Page 246 of 384
Display messagesPossible causes/consequences and M Solutionsb
AUTO Light
InoperativeThe light sensor is defective.XVisit a qualified specialist workshop.
USA only:
XSwitch off the daytime running lamps in the on-board computer
( Y page 224).XSwitch the lights on and off using the light switch.b
Switch Off LightsThe lights are still switched on when you leave the vehicle. A
warning tone also sounds.XTurn the light switch to $ or Ăƒ .
or
XIf the rear fog lamp is switched on: press the light switch in to
the stop.
Engine
Display messagesPossible causes/consequences and M Solutions+
Top Up Coolant See
Operator's ManualThe coolant level is too low.XAdd coolant, observing the warning notes when doing so
( Y page 303).XIf the coolant needs to be refilled more often than usual, have
the engine coolant system checked at a qualified specialist
workshop.GWARNING
Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn
if it comes into contact with hot engine parts. You could be seriously burned.
! The coolant level is too low. Avoid making long journeys with too little coolant in the cooling
system. The engine will otherwise be damaged.
The display messages and the corresponding symbol that indicate that the coolant level is
too low must not be ignored.
244Display messagesOn-board computer and displays
Page 260 of 384
Warning and indicator lamps in the instrument cluster
Seat belts
ProblemPossible causes/consequences and M Solutions7
After starting the
engine, the red seat
belt warning lamp lights
up for six seconds.The seat belt warning lamp reminds the driver and front passenger
to fasten their seat belts.XFasten your seat belt ( Y page 55).7
After starting the
engine, the red seat
belt warning lamp lights
up. In addition, a
warning tone sounds
for up to six seconds.GRisk of injury
The driver's seat belt is not fastened.
XFasten your seat belt ( Y page 55).
The warning tone ceases.7
The red seat belt
warning lamp lights up
after the engine starts,
as soon as the driver's
or the front-passenger
door is closed.GRisk of injury
The driver or front passenger has not fastened their seat belt.
XFasten your seat belt ( Y page 55).
The warning lamp goes out.GRisk of injury
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seat and stow
them in a secure place.
The warning lamp goes out.258Warning and indicator lamps in the instrument clusterOn-board computer and displays
Page 266 of 384
EngineProblemPossible causes/consequences and M Solutions! (USA only)
; (Canada only)
The yellow Check
Engine warning lamp
lights up while the
ignition is switched on
with the engine
running.There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system (for vehicles with a gasoline engine)
R in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.XHave the vehicle checked as soon as possible at a qualified
specialist workshop.
i In some states, you are required by law to immediately visit a
qualified specialist workshop as soon as the yellow Check
Engine warning lamp lights up. If in doubt, check whether such
legal regulations apply in the state/province in which you are
currently driving.
Vehicles with a diesel engine: the fuel tank has been run dry
( Y page 163).XStart the engine three to four times after refueling.
If the yellow Check Engine warning lamp goes out, emergency
running mode is canceled. The vehicle need not be checked.The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the !
(USA only)/ ;
(Canada only) yellow
Check Engine warning
lamp may light up.The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.XObserve the additional display messages in the multifunction
display.XCheck that the fuel filler cap is correctly closed.XIf the fuel filler cap is not correctly closed: close the fuel filler
cap.XIf the fuel filler cap is closed: visit a qualified specialist
workshop.The yellow reserve fuel
warning lamp lights up
while the engine is
running.The fuel level has dropped into the reserve range.XRefuel at the nearest gas station.264Warning and indicator lamps in the instrument clusterOn-board computer and displays
Page 267 of 384
Driving systemsProblemPossible causes/consequences and M Solutions·
The red distance
warning lamp lights up
while the vehicle is in
motion. A warning tone
also sounds.GRisk of accident
The warning is issued if you approach a stationary vehicle or a
vehicle driving ahead of you at too high a speed.
XBe prepared to brake immediately.XPay careful attention to the traffic situation. You may have to
brake or take evasive action.
More information about DISTRONIC (Y page 182) and the distance
warning signal ( Y page 72).
Tires
ProblemPossible causes/consequences and M Solutionsh
USA only:
The yellow tire pressure
monitor warning lamp
(pressure loss/
malfunction) is lit.GRisk of accident
The tire pressure monitor has detected a loss of pressure in at
least one of the tires.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XObserve the additional display messages in the multifunction
display.XCheck the tire pressure. If necessary, correct the tire pressure
( Y page 347).XIf necessary, change a wheel ( Y page 362).h
USA only:
The yellow tire pressure
monitor warning lamp
(pressure loss/
malfunction) flashes for
60 seconds and then
remains lit.The tire pressure monitor is defective.XObserve the additional display messages in the multifunction
display.XVisit a qualified specialist workshop.GWARNING
Each tire, including the spare (if provided), should be checked every other week when cold and
inflated to the inflation pressure recommended by the vehicle manufacturer on the Tire and
Loading Information placard on the driver's door B-pillar or, if available, the tire inflation pressure
label on the inside of the fuel filler flap. If your vehicle has tires of a different size than the size
Warning and indicator lamps in the instrument cluster265On-board computer and displaysZ