2016 MERCEDES-BENZ GLS SUV brake

Display messages
Possible causes/consequences and
M
MSolutions Radar
Radar
sensors
sensors dirty
dirty
See Owner's Manual
See Owner's Manual The radar sensor system is malfunctioning.
Possible causes:
R Dirt on sensors
R Heavy rain or snow
R Driving on inter-urban roads without traffic or infrastructure, e.g. in
desert-like areas
At least one driving system or driving safety system is malfunctioning
or is temporarily unavailable:
R PRE-SAFE ®
PLUS
R Active Brake Assist
R Active Lane Keeping Assist
R Active Blind Spot Assist
R Distance Pilot DISTRONIC
If the radar sensor system in front is dirty, Active Blind Spot Assist will not perform a course-correcting brake application.
A warning tone also sounds.
Once the cause of the problem is no longer present, the driving and
driving safety systems will be available again. The display message
disappears.
If the display message does not disappear:
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 168).
X Switch off the engine.
X Clean all sensors (Y page 341).
X Restart the engine.
The display message disappears. ü Mercedes-AMG vehicles only:
If this symbol appears in the multifunction display, a seat belt tongue
has been inserted into a rear seat belt buckle.
Further information on the status indicator for the rear seat belts
(Y page 47). ý Mercedes-AMG vehicles only:
If this symbol appears in the multifunction display, a seat belt tongue
has not been inserted in a rear seat belt buckle.
G WARNING
A seat belt which is not worn correctly, or which has not been engaged
in the seat belt buckle correctly, cannot provide the intended level of protection.
This poses an increased risk of injury.
X If necessary, ask the occupants in the rear to fasten their seat belts
(Y page 46).
Further information on the status indicator for the rear seat belts
(Y page 47). 266
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions ACTIVE
ACTIVE
CURVE
CURVESYSTEM
SYSTEM
malfunctioning see
malfunctioning see
Owner's Manual Owner's Manual The ACTIVE CURVE SYSTEM is faulty. The vehicle's handling charac-
teristics are severely impaired. A warning tone also sounds.
G WARNING
There is a risk of an accident.
X Drive on carefully.
X Adjust your driving style to the altered handling characteristics.
X Avoid sudden acceleration in tight corners and quick steering move-
ments.
X Do not drive at speeds above 80 km/h.
X Consult a qualified specialist workshop immediately. 8
Different. lock Different. lock
sys. Malfunction sys. Malfunction The differential lock is faulty.
X Do not drive at speeds above 80 km/h.
X Consult a qualified specialist workshop. 8
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 cancelled. 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.
X Repeat the gearshift process. LOW RANGE Malfunc‐
LOW RANGE Malfunc‐
tion tion
To
Topark,
park, apply
apply
parking brake
parking brake LOW RANGE is malfunctioning.
X Do not drive at speeds above 80 km/h.
X When parking, safeguard the vehicle against rolling away
(Y page 168).
X Consult a qualified specialist workshop. LOW RANGE max. LOW RANGE max.
speed 40 km/h speed 40 km/h 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 70 km/h speed 70 km/h 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 N.
X Briefly shift the automatic transmission to position N. Display
messages
277On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Parking Pilot is unavailable or malfunctioning.
X Switch off the ignition and restart the engine.
If the Parking Pilot continues to be unavailable (the jsymbol does
not appear in the multifunction display):
X Consult a qualified specialist workshop. Parking Pilot ended
Parking Pilot ended The vehicle is parked. A warning tone also sounds.
The display message disappears automatically. Distance Pilot off
Distance Pilot off Distance Pilot DISTRONIC is deactivated.
If a warning tone also sounds, Distance Pilot has deactivated auto-
matically (Y page 184). Distance Pilot
Distance Pilot
available again available again Distance Pilot DISTRONIC is operational again after having been tem-
porarily unavailable. You can now reactivate Distance Pilot
DISTRONIC (Y page 184). Distance Pilot cur‐
Distance Pilot cur‐
rently unavailable rently unavailable
See Owner's Manual See Owner's Manual Distance Pilot DISTRONIC is temporarily inoperative.
Steering Pilot is also temporarily inoperative.
Possible causes:
R The radar sensor system is temporarily inoperative, e.g. due to
electromagnetic 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.
A warning tone also sounds.
Once the causes listed above no longer apply, the display message
goes out.
Distance Pilot DISTRONIC is operational again.
If the display message does not disappear:
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 168).
X Restart the engine. Distance Distance
Pilot
Pilotinop‐
inop‐
erative
erative Distance Pilot DISTRONIC is faulty.
The following may have also failed:
R Active Brake Assist
R Active Brake Assist with cross-traffic function
A warning tone also sounds.
X Consult a qualified specialist workshop. Distance Pilot pas‐ Distance Pilot pas‐
sive sive You have depressed the accelerator pedal. Distance Pilot DISTRONIC
is no longer controlling the speed of the vehicle.
X Remove your foot from the accelerator pedal. 280
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Check tyre(s)
Check tyre(s) The tyre pressure in one or more tyres has dropped significantly. The
wheel position is displayed in the multifunction display.
A warning tone also sounds.
G WARNING
Underinflated tyres pose the following risks:
R the tyres may burst, especially as the load and vehicle speed
increase
R the tyres may wear excessively and/or unevenly, which may greatly
impair tyre traction
R the driving characteristics, as well as steering and braking, may be
greatly impaired
There is a risk of an accident.
X Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 168).
X Check the tyres and, if necessary, follow the instructions for a flat
tyre (Y page 346).
X Check the tyre pressure (Y page 367).
X If necessary, correct the tyre pressure. Warning tyre defect Warning tyre defect The tyre pressure in one or more tyres has dropped suddenly. The
wheel position is displayed in the multifunction display.
G WARNING
If you drive with a flat tyre, there is a risk of the following hazards: R a flat tyre affects the ability to steer or brake the vehicle
R you could lose control of the vehicle
R continued driving with a flat tyre will cause excessive heat build-up
and possibly a fire
There is a risk of an accident.
X Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 168).
X Check the tyres and, if necessary, follow the instructions for a flat
tyre (Y page 346). Tyre Tyre
press.
press. monitor
monitor
currently unavaila‐
currently unavaila‐
ble ble No signals can be received from the tyre pressure sensors due to
strong RF interference. The tyre pressure monitor is temporarily mal-
functioning.
X Drive on.
The tyre pressure monitor restarts automatically as soon as the
cause has been rectified. 284
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Wheel sensor(s)
Wheel sensor(s)
missing missing There is no signal from the tyre pressure sensor of one or several
wheels. The pressure of the affected tyre is not displayed in the mul-
tifunction display.
X Have the faulty tyre pressure sensor replaced at a qualified spe-
cialist workshop. Tyre Tyre
press.
press. monitor
monitor
inoperative No
inoperative No
wheel sensors wheel sensors The wheels fitted do not have suitable tyre pressure sensors. The tyre
pressure monitor is deactivated.
X Fit wheels with suitable tyre pressure sensors.
The tyre pressure monitor is activated automatically after driving for
a few minutes. Tyre Tyre
press.
press. monitor
monitor
inoperative
inoperative The tyre pressure monitor is faulty.
X Consult a qualified specialist workshop. Vehicle
Display messages
Possible causes/consequences and
M
MSolutions To start engine,
To start engine,
shift to either P shift to either P
or N or N You have attempted to start the engine with the transmission in posi-
tion Ror D.
X Shift the transmission to position Por N. Apply
Apply
brake
braketo
todese‐
dese‐
lect Park (P) posi‐
lect Park (P) posi‐
tion tion You have attempted to shift the transmission to position
D,Ror N
without depressing the brake pedal.
X Depress the brake pedal. To shift out of P
To shift out of P
or or
N,
N,depress
depress brake
brake
and start engine
and start engine With the engine switched off, you have attempted to shift the trans-
mission out of position Por Ninto another transmission position.
X Depress the brake pedal.
X Start the engine. Risk of vehicle
Risk of vehicle
rolling Transmis‐ rolling Transmis‐
sion not in P sion not in P The driver's door is open/not fully closed and the transmission is in
position R,Nor D.
A warning tone also sounds.
G WARNING
The vehicle may roll away.
There is a risk of an accident.
X Shift the transmission to position P.
X Secure the vehicle against rolling away (Y page 168).
X Close the driver's door fully. Only select Park Only select Park
(P) (P)
when
when vehicle
vehicle is
is
stationary
stationary The vehicle is moving.
X
Stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions.
X Shift the transmission to position P. Display
messages
285On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Without changing
Without changing
gear, consult work‐ gear, consult work‐
shop shop You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position
Dis selected:
X Drive to a qualified specialist workshop without shifting the trans-
mission from position D.
If transmission position R,Nor Pis selected:
X Secure the vehicle against rolling away (Y page 168).
X Consult a qualified specialist workshop. Reversing Reversing
not
not poss.
poss.
Consult workshop
Consult workshop You cannot shift to transmission position
Rdue to a malfunction.
The transmission positions P,Nor Dcontinue to be available.
A warning tone also sounds.
X Consult a qualified specialist workshop. Transmission Mal‐
Transmission Mal‐
function Stop function Stop A malfunction has occurred in the mechanical transmission compo-
nents.
A warning tone also sounds. The transmission shifts automatically to position N.
X Stop the vehicle, paying attention to road and traffic conditions.
X Shift the transmission to position P.
X Safeguard the vehicle against rolling away (Y page 168).
X Consult a qualified specialist workshop. Auxiliary battery Auxiliary battery
malfunction malfunction The auxiliary battery for the automatic transmission is no longer being
charged.
X Consult a qualified specialist workshop.
X Until then, set the automatic transmission to position Pbefore you
switch off the engine.
X Before leaving the vehicle, apply the electric parking brake. A The tailgate is open.
G WARNING
When the engine is running, exhaust gases can enter the vehicle inte- rior if the tailgate is open.
There is a risk of poisoning.
X Close the tailgate. 286
Display
messagesOn-board computer and displays

Safety systems
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions J
N
The red brake system warning lamp lights up while the engine is running.
A warning tone also sounds.
G WARNING
The brake boosting effect is malfunctioning and the braking characteristics may be
affected.
There is a risk of an accident.
X Stop the vehicle immediately, paying attention to road and traffic conditions. Do
not continue driving.
X Secure the vehicle against rolling away (Y page 168).
X Consult a qualified specialist workshop.
X Observe the additional display messages in the multifunction display. J
N
The red brake system warning lamp lights up while the engine is running.
A warning tone also sounds.
G WARNING
There is insufficient brake fluid in the brake fluid reservoir.
There is a risk of an accident.
X Stop the vehicle immediately, paying attention to road and traffic conditions. Do
not continue driving.
X Secure the vehicle against rolling away (Y page 168).
X Do not top up the brake fluid. Topping up will not correct the fault.
X Consult a qualified specialist workshop.
X Observe the additional display messages in the multifunction display. J
N
The yellow brake system warning lamp lights up while the engine is running.
A warning tone also sounds.
G WARNING
The brake system is malfunctioning and the braking characteristics may be affec- ted.
There is a risk of an accident.
X If the multifunction display shows a display message, please observe this.
X Drive on carefully.
X Consult a qualified specialist workshop immediately. 292
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions !
N
The yellow ABS warning lamp lights up while the engine is running.
ABS (Anti-lock Braking System) has been deactivated due to a fault.
Other driving and driving safety systems may also be malfunctioning.
In addition, the ÷andå warning lamps may light up in the instrument
cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.
The steerability and braking characteristics may be severely affected. The braking
distance may increase in an emergency braking situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Observe the additional display messages in the multifunction display.
X Drive on carefully.
X Consult a qualified specialist workshop immediately.
If the ABS control unit is faulty, there is also a possibility that other systems, such as the navigation system or the automatic transmission, will be unavailable. Warning and indicator lamps in the instrument cluster
293On-board computer and displays Z