2013 MERCEDES-BENZ GL-Class check engine

R
Secure any objects on the traile rto prevent
the cargo from slipping when the vehicle is
in motion.
R If you couple up a trailer, regularly check
the cargo for secure fastening and make
sure that the trailer lamps and (if
applicable) the trailer brakes are
functioning correctly.
R Bear in mind that the handling will be less
stable when towing a trailer than when
driving without one. Avoid sudden steering
movements.
R The vehicle/trailer combination is heavier,
accelerates more slowly, has a decreased
gradient climbing capability and a longer
braking distance.
It is more susceptible to side winds and
requires more careful steering.
R If possible, avoid abrupt braking. Depress
the brake pedal moderately at first, so that
the trailer can activate its own brakes. Then
increase the pressure on the brake pedal.
R If the automatic transmission continues to
shift back and forth between two gears
when driving up or downhill, restrict the
shift range. Select shift range 4, 3, 2,or1.
Al ower gear and lower speed reduce the
risk of engine failure.
R When driving downhill, shift to a lower gear
to utilize the engine's braking effect.
Avoid continuous brake application as this
may overheat the vehicle brakes and, if
installed, the trailer brakes.
R If the coolant temperature increases
dramatically while the air-conditioning
system is switched on, switch off the air-
conditioning system.
Coolant heat can additionally be dissipated
by opening the windows and by setting the
blower fan and the interior temperature to
maximum.
R When overtaking, pay particular attention
to the extended length of your vehicle/
trailer combination. Due to the length of your vehicle/trailer
combination, you will have to travel an
additional distance beyond the vehicle you
are overtaking before returning to the
previous lane. Decoupling
atrailer G
WARNING
If you uncouple a trailer with the overrun
brake engaged, you could trap your hand
between the vehicle and the trailer drawbar.
There is a risk of injury.
Do not uncouple a trailer if the overru nbrake
is engaged. G
WARNING
Vehicles with level control:
The vehicle is lowered as soon as you
disconnect the trailer cable. This could result
in yourl imbs or those of other people that are
betwee nthe vehicle body and tires or
underneath the vehicle being trapped. There
is a risk of injury.
Make sure that nobody is in the immediate
vicinity of the wheel housings or under the
vehicle when you disconnectt he trailer cable.
! Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could be damaged by the
rebounding of the overrun brake.
X Make sure that the automatic transmission
is set to position P.
X Apply the vehicle's electric parking brake.
X Start the engine.
X Close all doors and the tailgate.
X Apply the trailer's parking brake.
X Detach the trailer cable and decouple the
trailer.
X Switch off the engine. 262
Towing
atrailerDriving an d parking

Engine
Display messages Possible causes/consequences and
0001 Solutions
000F
Check Coolant
Level See
Operator's Manual The coolant level is too low.
!
Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(Y page 369).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop. 000E The fan motor is faulty.
X
At coolant temperatures below 248 ‡ (120 †) drive to the
neares tqualified specialist workshop.
X Avoid subjecting the engin eto heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. 000E
Coolant Too Hot
Stop Vehicle Turn
Engine Off The coolant is too hot.
Aw
arning tone also sounds.
G WARNING
Do no tdrive when youre ngine is overheated. Thi scan cause some
fluids which may have leaked into the engine compartmen tto
catch fire.
Stea mfrom the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 183).
X Waitu ntil the engine has cooled down.
X Make sure tha tthe air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 248 ‡ (120 †).
Otherwise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †). Display messages
303On-board computer and displays Z

Display messages Possible causes/consequences and
0001 Solutions
000B The battery is no
tbeing charged.
Aw arning tone also sounds.
Possible causes are:
R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronics
X Pull ove rand stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Ope nthe hood.
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 a qualified specialist workshop.
If the poly-V-belt is not damaged:
X Visit a qualified specialist workshop. 0013
Check Engine Oil
At Next Refueling The engine oil level has dropped to the minimum level.
Aw
arning tone also sounds.
X Chec kthe oil level when next refueling, at the latest
(Y page 368).
X If necessary, add engine oil (Y page 368).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 304
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
0001 Solutions
0013
Check Engine Oil
Level (Add 1 quart) AMG vehicles: the engine oil level is too low.
X
Chec kthe oil level when next refueling, at the latest
(Y page 368).
X If necessary, add engine oil (Y page 368).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 0012
Fuel Level Low The fuel level has dropped into the reserve range.
X
Refuel at the nearest gas station. 000A There is only a very small amount of fuel in the fuel tank.
X
Refuel at the nearest gas station without fail. 0012
Gas Cap Loose The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X
Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed:
X Close the fuel filler cap.
If the fuel filler cap is correctly closed:
X Visit a qualified specialist workshop. 0012
Ultra Low-sulfur
Diesel Fuel Only Vehicles with a diesel engine: the fuel level has fallen below the
reserve range.
X Refuel at the nearest gas station.
X Only use commercially available vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL (ULSD, 15ppm SULFUR MAXIMUM). 0004
Replace Air Filter Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X
Visit a qualified specialist workshop. 0001
Check Fuel Filter Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
X
Visit a qualified specialist workshop. Display messages
305On-board computer and displays Z

Display messages Possible causes/consequences and
0001 Solutions
0002
Check
Additive See
Operator's Manual The DEF tank is almost empty.
X
Have the DE Ftank filled as soon as possible at aqualified
specialist workshop (Y page 181).0002
Remaining Starts:
16 The DE
Flevel has fallen to a minimum. You can start the engine a
further 16 times.
X Have the DEFt ank filled immediately at a qualified specialist
workshop (Y page 181).
i You can start the engine a further 16 times. If DE Fis not added,
it will then not be possible to restart the engine. Refill the DEF
tank with approximately 1 gal (3.8 l) DEF (Y page 181).Driving systems
Display messages Possible causes/consequences and
0001 Solutions
0003
Attention Assist:
Take a Break! Based on certain criteria, ATTENTION ASSIST has detected fatigue
or
alack of concentration on th epart of th edriver. A warning tone
also sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so you get
enough rest. 0003
Attention Assist
Inoperative ATTENTION ASSIST is inoperative.
X
Visi taqualified specialist workshop. 0002
Drive More Slowly You cannot change the vehicle level. Possible causes are:
R
you are driving too fast for the selected vehicle level.
R you are towing a trailer.
R the trailer-coupling socket is being used, e.g. for a bicycle rack.
X Drive more slowly and then select the desired vehicle level
again.
R
Vehicles with the ON&OFFROA Dpackage (Y page 207)
R Vehicles with the AIRMATIC package (Y page 213)
X Observe the notes on towing a trailer (Y page 257).306
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
0001 Solutions
ACTIVE CURVE
SYSTEM Malfunction
See Operator's
Manual The Active Curve Syste
mis faulty. The vehicle's handling
characteristics are severely impaired.Aw arning tone also sounds.
G WARNING
There is a ris kofanaccident.
X Drive on carefully.
X Adjust your driving style to the altered handling characteristics.
X Avoid sudde nacceleration in tigh tbends and fast steering
movements.
X Do not drive faster than 50 mph (80km/h).
X Visit a qualified specialist workshop immediately. 000C
Lowering
Max.
Speed 12 mph The vehicle is being lowered from off-road level
3to off-road level
2. The display message informs you of the maximum speed
permissible for off-road level 3.
X Do not drive faster than 12 mph (20 km/h) until off-road level 2
has been reached. 0013
Different. Lock
Sys. Malfunction The differential loc
kis malfunctioning.
X Do not drive faster than 50 mph (80km/h).
X Have the vehicle checked at a qualified specialist workshop. 0013
Different.
Locking
Sys. Cooling Down
Please Wait The differential lock is too 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. LOW RANGE Stop
Apply Parking Brake Ag
earshift process has been canceled. LOW RANGE is in the
neutral position .There is no connection between the engine and
the drive wheels.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Apply the electric parking brake. Do not continue driving under
any circumstances.
X Repeatt he gearshift process. LOW RANGE
Malfunction To
Park, Apply Brake LOW RANGE is malfunctioning.
X
Do not drive faster than 50 mph (80km/h).
X When parking, secure the vehicle against rolling away
(Y page 183).
X Have the vehicle checked at a qualified specialist workshop. 308
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
0001 Solutions
0002
Key Not Detected
(white display
message) The KEYLESS-GO key cannot be detected at present.
X
Change the location of the SmartKey wit hthe KEYLESS-GO
functions in the vehicle.
If the KEYLESS-GO key is still not detected:
X Operate the vehicle with the SmartKey in the ignition lock. 0002
Key Detected in
Vehicle The KEYLESS-GO key has been detected inside the vehicle during
locking.
X
Remove the KEYLESS-GO key from the vehicle. 0002
Remove 'Start'
Button and Insert
Key KEYLESS-GO is temporarily malfunctioning or is defective. A
warning tone also sounds.
X
Insert the SmartKey into the ignition lock and turn it to the
desired position.
X Visit a qualified specialist workshop. 0002
Close Doors to
Lock Vehicle At least one door is open.
Awarning tone also sounds.
X Close all doors and loc kthe vehicle again. Warning and indicator lamps in the
instrument cluster
Overview
000D Low-beam headlamps
(Ypage 125)
0016 Parking lamps (Y page 126)
000C High-beam headlamps
(Ypage 128)
00070006 Turn signal (Ypage 127)
0014 Seat belts (Ypage 321)
0012 (USA) Brakes (Y page 322)
0009 (Canada)B rakes (Ypage 322)
0019 ABS (Ypage 323)
000F ESP®
(Y page 325)
0017 ESP®
OFF (Y page 325)
0008 (USA) Electric parking brake (red)
(Ypage 328)
000D (Canada )Electric parking brake (red)
(Y page 328) 000D
Electric parking brake
(yellow) (Ypage 328)
001F SRS (Ypage 328)
0010 Check Engine (Y page 329)
0012 Reserve fuel (Ypage 329)
000E Coolant (Ypage 330)
000F Distance warning function
(Ypage 332)
0010 Diesel engine: preglow
(Ypage 165)
0013 Tire pressure monitor
(Ypage 333) 320
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
0001 Solutions
000F
The yellow ESP
®
warning lamp flashes
while the vehicle is in
motion. ESP
®
or traction control has intervened because there is a risk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
X When pulling away, only depress the accelerator pedal as far as
necessary.
X Ease off the accelerator pedal while the vehicle is in motion.
X Adapt your driving style to suit the road and weather conditions.
X Do not deactivate ESP ®
.
In rare cases (Y page 71), it may be best to deactivate ESP ®
. 0017
The yellow ESP
®
OFF
warning lamp is lit while
the engine is running. ESP
®
is deactivated.
G WARNING
If ESP ®
is switched off, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Reactivate ESP ®
.
In rare cases (Y page 71), it may be best to deactivate ESP ®
.
X Adapt your driving style to suit the road and weather conditions.
If ESP ®
cannot be activated:
X Have ESP ®
checked at a qualified specialist workshop. 000F0017
The yellow ESP
®
and
ESP ®
OFF warning
lamps are lit while the
engine is running. ESP
®
,B AS, BAS PLUS, PRE-SAFE ®
,P RE-SAFE ®
Brake ,COLLISION
PREVENTION ASSIST, the HOLD function, hill start assist,
crosswind driving assistance and ESP ®
trailer stabilization are not
available due to a malfunction.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit a qualified specialist workshop. 326
Warning and indicator lamps in the instrument clusterOn-board computer and displays