check engine MERCEDES-BENZ GLE 2019 Service Manual

Decoupling a trailer
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 overrun brake is engaged. G
WARNING
Vehicles with level control:
The vehicle is lowered as soon as you discon-
nect the trailer cable. This could result in your limbs or those of other people that are
between the vehicle body and tires or under-
neath 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 disconnect the 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 Shift the transmission to position 005D.
X Apply the vehicle's electric parking brake.
X Start the engine.
X Close the doors and tailgate.
X Apply the trailer's parking brake.
X Detach the trailer cable and decouple the
trailer.
X Switch off the engine. Permissible trailer loads and drawbar
loads
Weight specifications Maximum allowable gross mass
The gross vehicle weight of the trailer is calcu-
lated by adding the weight of the trailer to the
weight of the load and equipment on the trailer.
You will find installing dimensions and loads
under "Technical data" (Y page 394).Permissible noseweight
You will find installing dimensions and loads
under "Technical data" (Y page 394).
Loading a trailer R
When loading the trailer, make sure that nei-
ther the permissible gross weight of the trailer
nor the gross vehicle weight are exceeded.
The permissible gross vehicle weight is indi-
cated on the identification plate located on
the B-pillar on the driver's side of the vehicle.
You can find the maximum permissible values
on the type plates of your vehicle and the
trailer. When calculating how much weight
the vehicle and trailer may carry, pay atten-
tion to the respective lowest values.
R The trailer drawbar load on the ball coupling
must be added to the rear axle load to avoid
exceeding the permissible gross axle weight.
The permissible gross vehicle weight is indi-
cated on the identification plate located on
the B-pillar on the driver's side of the vehicle.
i Mercedes-Benz recommends a trailer load
where the trailer drawbar noseweight
accounts for 8 % to 15 % of the trailer's per-
missible gross weight.
i The weight of additional accessories, pas-
sengers, and cargo reduces the permissible
trailer load and drawbar load for your vehicle.
Checking the vehicle and trailer weight R
To check that the weights of the towing vehi-
cle and the trailer comply with the maximum
permissible values, have the vehicle/trailer
combination (including the driver, passen-
gers, and cargo with a fully laden trailer)
weighed on a calibrated weighbridge.
R Check the gross axle weight rating of the front
and rear axles, the gross weight of the trailer
and the trailer drawbar noseweight. Removing the ball coupling
X Remove the spring cotter.
X Remove the bolt from the ball coupling
recess.
X Remove the ball coupling from the ball cou-
pling recess. Towing a trailer
225Driving and parking Z

Display messages
Possible causes/consequences and
0050
0050Solutions The yellow
0024warning lamp lights up and the red 0049(USA only)
or 0024 (Canada only) indicator lamp flashes.
It is not possible to apply the electric parking brake manually.
X Shift the transmission to position 005D.
X Visit a qualified specialist workshop. 0027
(USA only)
004D (Canada only)
Check Brake Fluid
Check Brake Fluid
Level
Level There is not enough brake fluid in the brake fluid reservoir. In addition,
the 0027 (USA only) or 004D(Canada only) warning lamp lights up in
the instrument cluster and a warning tone sounds.
G WARNING
The braking effect may be impaired.
There is a risk 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 156).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. 0026
Check Check
Brake
Brake Pad
PadWear
Wear The brake pads/linings have reached their wear limit.
USA only: the red
0027brake system warning lamp is lit while the
engine is running.
X Visit a qualified specialist workshop. 0053
Inoperative Inoperative One or more main features of the mbrace system are malfunctioning.
X Visit a qualified specialist workshop. Active
Active
Brake
Brake Assist
Assist
Functions
Functions Currently
Currently
Limited See Opera‐
Limited See Opera‐
tor's Manual tor's Manual Active Brake Assist with cross-traffic function is temporarily inopera-
tive.
Possible causes are:
R the radar sensor system is temporarily inoperative, e.g. due to elec-
tromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation
R the system is outside the operating temperature range
R the on-board voltage is too low
When the causes stated above no longer apply, the display message
disappears.
Active Brake Assist with cross-traffic function or PRE ‑SAFE®
PLUS is
functional 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 rolling away (Y page 156).
X Restart the engine. 250
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 0049
Switch Off Lights Switch Off Lights You leave the vehicle and the lights are switched on. A warning tone
also sounds.
X Turn the light switch to the 0058position. 0049
Switch On Headlamps Switch On Headlamps You are driving with low-beam headlamps switched off.
X Turn the light switch to the 0058or0058 position. Adaptive Highbeam
Adaptive Highbeam
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Adaptive Highbeam Assist is deactivated and temporarily inoperative.
Possible causes are:
R The windshield in the camera's field of vision is dirty.
R Visibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational, the Adap‐
Adap‐
tive Highbeam Assist Now Available
tive Highbeam Assist Now Available message is displayed.
Adaptive Highbeam Assist is operational again. Adaptive Highbeam
Adaptive Highbeam
Assist Inoperative
Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Engine
Display messages
Possible causes/consequences and
0050 0050Solutions 00BD
Check Check
Coolant Coolant Level
Level
See Operator's Man‐
See Operator's Man‐
ual ual 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 324).
If you have to add coolant frequently: X Contact a qualified specialist workshop and have the engine cooling
system checked. 00AC The fan motor is malfunctioning.
X At coolant temperatures below 248 ‡(120 †), drive to the nearest
qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-and-go traffic. Display messages
257On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions 003D
Stop Vehicle See Stop Vehicle See
Operator's Manual Operator's Manual The battery is no longer being charged and the condition of charge is
too low.
A warning tone also sounds.
X Pull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 156).
X Observe the instructions in the 003DSee Operator's Manual See Operator's Manual
display message.
X Consult a qualified specialist workshop. 00B2
Check Check
Engine
Engine Oil
OilAt
At
Next Refueling
Next Refueling The engine oil level has dropped to the minimum level.
A warning tone also sounds.
! Avoid long journeys with too little engine oil. The engine will oth-
erwise be damaged.
X Check the oil level when next refueling, at the latest (Y page 323).
X If necessary, add engine oil (Y page 323).
If the engine oil needs topping up more often: X Contact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at http://bevo.mercedes- benz.com. 00B2
Check Engine Oil Check Engine Oil
Level (Add 1 quart) Level (Add 1 quart) Mercedes-AMG vehicles: the engine oil level is too low.
! Avoid long journeys with too little engine oil. The engine will oth-
erwise be damaged.
X Check the oil level when next refueling, at the latest (Y page 323).
X If necessary, add engine oil (Y page 323).
If the engine oil needs topping up more often: X Contact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at http://bevo.mercedes- benz.com. 00B2
Engine Oil Level Engine Oil Level
Low Stop Vehicle Low Stop Vehicle
Turn Engine Off Turn Engine Off Mercedes-AMG vehicles: the engine oil level is too low.
There is a risk of engine damage.
X Pull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 156).
X Check the engine oil level (Y page 323).
X If necessary, add engine oil (Y page 323).00B6
Fuel Level Low Fuel Level Low The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. Display
messages
259On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions 00A8 There is only a very small amount of fuel in the fuel tank.
X Refuel at the nearest gas station without fail. 00B6
Gas Cap Loose Gas Cap Loose 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. 00B6
Ultra Low-sulfur Ultra Low-sulfur
Diesel Fuel Only 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, 15 ppm SULFUR MAXIMUM). 009E
Replace Air Filter Replace Air Filter Vehicles with a diesel engine: the engine air filter is dirty and must be
replaced.
X Visit a qualified specialist workshop. 003A
Check Fuel Filter 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. 00C8
Check Additive See Check Additive See
Operator's Manual Operator's Manual The DEF tank is almost empty.
X
Have the DEF tank filled immediately at a qualified specialist work-
shop (Y page 153). The DEF system is malfunctioning.
X Visit a qualified specialist workshop. 00C8
Remaining Remaining
Starts:
Starts:16
16 The DEF level has fallen to a minimum. You can start the engine a
further 16 times.
X Have the DEF tank filled immediately at a qualified specialist work-
shop (Y page 153).
i You can start the engine a further 16 times. If DEF is not added, it
will then not be possible to restart the engine. Refill the DEF tank
with approximately 2 gal (7.5 l) of DEF (Y page 153). If the 'ten starts' message appears in the display and a warning tone
sounds, the DEF system is malfunctioning.
X Visit a qualified specialist workshop. 260
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 00F6
Different. Lock Different. Lock
Sys. Malfunction Sys. Malfunction The differential lock is faulty.
X Do not drive at speeds above 50 mph (80 km/h).
X Visit a qualified specialist workshop. 00F6
Different. Locking Different. Locking
Sys. Cooling Down Sys. Cooling Down
Please Wait 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 re-engages as soon as it has cooled down. LOW RANGE Stop LOW RANGE Stop
Apply Parking Brake Apply Parking Brake A gearshift 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 Repeat the gearshift process. LOW RANGE Malfunc‐
LOW RANGE Malfunc‐
tion tion
To
ToPark,
Park, Apply
Apply
Brake
Brake LOW RANGE is malfunctioning.
X Do not drive at speeds above 31 mph (50 km/h).
X When parking, secure the vehicle against rolling away (Y page 156).
X Visit a qualified specialist workshop. LOW RANGE Max.
LOW RANGE Max.
Speed 25 mph Speed 25 mph You have exceeded the maximum speed for the gearshift process.
X Drive more slowly.
The gear change is made. LOW RANGE Max. LOW RANGE Max.
Speed 31 mph Speed 31 mph You have exceeded the maximum speed for the gearshift process.
X Drive more slowly.
The gear change is made. LOW RANGE Shift to LOW RANGE Shift to
Position N Briefly Position N Briefly You have reduced the vehicle speed, but the automatic transmission
is not in position 005C.
X Briefly shift the automatic transmission to 005C.LOW RANGE Shifting LOW RANGE Shifting
Canceled Please Canceled Please
Reactivate Reactivate The gearshift process has been canceled.
X Repeat the gearshift process. 00C6
Inoperative Inoperative DSR (Downhill Speed Regulation) is deactivated due to a malfunction.
X Have DSR checked at a qualified specialist workshop. Display
messages
263On-board computer and displays Z

Warning/
indicator
lamp
0051
0051 Signal type
Possible causes/consequences and 0050 0050Solutions 00E5
0051
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 Active Distance Assist DISTRONIC 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 ®
.
Observe the important safety notes on ESP ®
(Y page 70). 00BB
0051
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.
Further driving systems or driving safety systems are thus restricted, e.g. Active
Blind Spot Assist. The system does not perform course-correcting brake applica- tions.
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 ®
.
Observe the important safety notes on ESP ®
(Y page 70).
X Adapt your driving style to suit the road and weather conditions.
If ESP ®
cannot be activated:
X Drive on carefully.
X Contact a qualified specialist workshop and have ESP ®
checked. 280
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
0051
0051 Signal type
Possible causes/consequences and 0050 0050Solutions 00490024
0051
0049 (USA only), 0024(Canada only): the red indicator lamp for the electric
parking brake flashes or is lit and/or the yellow warning lamp for the electric
parking brake is lit.
X Observe the additional display messages in the multifunction display. 0075
0051
The red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Observe the additional display messages in the multifunction display.
X Drive on carefully.
X Contact a qualified specialist workshop and have the restraint system checked.
For further information about the restraint system, see (Y page 44).282
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Engine
Warning/
indicator
lamp
0051 0051
Signal type
Possible causes/consequences and 0050
0050Solutions 00B9
0051
The yellow Check Engine warning lamp lights up while the engine is 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 gasoline engines)
R in the fuel system
The emission limit values may be exceeded and the engine may be in emergency mode.
X Visit a qualified specialist workshop immediately.
Vehicles with a diesel engine: the fuel tank has been run dry (Y page 153).
X Start 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.
In some states, you must immediately visit a qualified specialist workshop as soon
as the yellow Check Engine warning lamp lights up. This is due to the legal require- ments in effect in these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving. 00B6
0051
The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. 00B6
0051
The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the 00B9Check Engine warning lamp may light up.
The fuel filler cap is not closed correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed: close the fuel filler cap.
X If the fuel filler cap is closed: visit a qualified specialist workshop.00AC
0051
The red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
The temperature sensor for the coolant temperature gauge is malfunctioning.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
X Secure the vehicle against rolling away (Y page 156).
X Consult a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
283On-board computer and displays Z

Warning/
indicator
lamp
0051
0051 Signal type
Possible causes/consequences and 0050 0050Solutions 00AC
0051
The red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked or the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooled sufficiently.
X Observe the additional display messages in the multifunction display.
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 156).
X Leave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page 324).
X If you have to add coolant frequently, have the engine cooling system checked.
X Make sure that the 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 coolant temperature is below 248 ‡
(120 †). Otherwise, the engine could be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic. 00AC
0051
The red coolant warning lamp comes on while the engine is running.
The coolant temperature has exceeded 248 ‡ (120 †). The airflow to the engine radiator may be blocked or the coolant level may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur just by opening the hood.
There is a risk of injury.
X Observe the additional display messages in the multifunction display.
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 156).
X Leave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page 324).
X If you have to add coolant frequently, have the engine cooling system checked.
X Make sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice. 284
Warning and indicator lamps in the instrument clusterOn-board computer and displays