2019 MERCEDES-BENZ GLS SUV sensor

Display messages
Possible causes/consequences and
0050
0050Solutions Active Parking Assist is unavailable or faulty.
X Switch off the ignition and restart the engine.
If Active Parking Assist continues to be unavailable (the 005Dsymbol
does not appear on the multifunction display):
X Visit a qualified specialist workshop. Active Parking
Active Parking
Assist Finished Assist Finished The vehicle is parked. A warning tone also sounds.
The display message disappears automatically. Active Distance
Active Distance
Assist Off Assist Off Active Distance Assist DISTRONIC was deactivated.
If a warning tone also sounds, the Active Distance Assist DISTRONIC
has deactivated automatically (Y page 172).Active Distance Active Distance
Assist Assist
Now
NowAvailable
Available Active Distance Assist DISTRONIC is operational again after having
been temporarily unavailable. You can now reactivate Active Distance
Assist DISTRONIC (Y page 172).Active Distance Active Distance
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Active Distance Assist DISTRONIC is temporarily inoperative.
Active Steering Assist is also temporarily inoperative.
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
A warning tone also sounds.
When the causes stated above no longer apply, the display message
disappears.
Active Distance Assist DISTRONIC 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 rolling away (Y page 158).
X Restart the engine. Active Distance Active Distance
Assist Inoperative Assist Inoperative Active Distance Assist 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 Visit a qualified specialist workshop. Act. Distance Act. Distance
Assist Suspended Assist Suspended You have depressed the accelerator pedal. Active Distance Assist
DISTRONIC is no longer controlling the speed of the vehicle.
X Remove your foot from the accelerator pedal. 266
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 0077
Check Tire(s) Check Tire(s) The tire pressure in one or more tires has dropped significantly. The
wheel position is displayed in the multifunction display.
A warning tone also sounds.
G WARNING
Tire pressures that are too low pose the following hazards: R they may burst, especially as the load and vehicle speed increase.
R they may wear excessively and/or unevenly, which may greatly
impair tire 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
maneuvers. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 158).
X Check the tires and, if necessary, follow the instructions for a flat
tire (Y page 335).
X Check the tire pressure (Y page 359).
X If necessary, correct the tire pressure. 0077
Warning Tire Mal‐ Warning Tire Mal‐
function function The tire pressure in one or more tires has dropped suddenly. The wheel
position is shown in the multifunction display.
G WARNING
Driving with a flat tire poses a risk of the following hazards: R a flat tire affects the ability to steer or brake the vehicle
R you could lose control of the vehicle.
R continued driving with a flat tire 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
maneuvers. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 158).
X Check the tires and, if necessary, follow the instructions for a flat
tire (Y page 335). Tire Tire
Press.
Press. Monitor
Monitor
Currently Unavaila‐
Currently Unavaila‐
ble ble Because there is interference from a strong source of radio waves, no
signals from the tire pressure sensors are detected. The tire pressure monitor is temporarily malfunctioning.
X Drive on.
The tire pressure monitor restarts automatically as soon as the
problem has been resolved. 0077
TirePress. Sen‐ TirePress. Sen‐
sor(s) Missing sor(s) Missing There is no signal from the tire pressure sensor of one or several tires.
The pressure of the affected tire is not displayed in the multifunction
display.
X Have the faulty tire pressure sensor replaced at a qualified special-
ist workshop. Display
messages
269On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions Tire Pressure Moni‐
Tire Pressure Moni‐
tor Inoperative No tor Inoperative No
Wheel Sensors Wheel Sensors The wheels mounted do not have a suitable tire pressure sensor. The
tire pressure monitor is deactivated.
X Mount wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving for a few minutes. Tire
Tire
Press.
Press. Monitor
Monitor
Inoperative
Inoperative The tire pressure monitor is faulty.
X Visit a qualified specialist workshop. Vehicle
Display messages
Possible causes/consequences and
0050
0050Solutions Shift
Shift
to
to'P'
'P' or
or'N'
'N'
to Start Engine
to Start Engine You attempted to start the engine with the transmission in position
005E
or 005B.
X Shift the transmission to position 005Dor005C. Apply Brake to
Apply Brake to
Shift from 'P' Shift from 'P' You attempted to shift the transmission to position
005B,005Eor005C
without depressing the brake pedal.
X Depress the brake pedal. To
To
Deselect
Deselect P
Por
or N,
N,
Depress Brake and
Depress Brake and
Start Engine Start Engine You attempted to shift the transmission out of position
005Dor005C into
another transmission position with the engine switched off.
X Depress the brake pedal.
X Start the engine. Apply Brake to
Apply Brake to
Select R Select R You have attempted to shift from position
005Bto position 005Ewithout
applying the brakes.
X Depress the brake pedal.
X Shift the transmission to position 005E. Driver's Door Open
Driver's Door Open
& Transmission Not & Transmission Not
in P Risk of Vehi‐ in P Risk of Vehi‐
cle Rolling Away cle Rolling Away The driver's door is open or not fully closed and the transmission is in
position 005E,005Cor005B.
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 005D.
X Secure the vehicle against rolling away (Y page 158).
X Close the driver's door completely. Only Shift to 'P' Only Shift to 'P'
when when
Vehicle
Vehicle is
isSta‐
Sta‐
tionary
tionary 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 005D. 270
Display
messagesOn-board computer and displays

Warning/
indicator
lamp
0051 0051
Signal type
Possible causes/consequences and 0050
0050Solutions 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 gage is at the start of the scale.
The temperature sensor for the coolant temperature gage 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 158).
X Consult a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
283On-board computer and displays Z

Always switch off the windshield wipers and
the ignition before cleaning the windshield or wiper blades.
! Do not pull the wiper blade. Otherwise, the
wiper blade could be damaged.
! Do not clean wiper blades too often and do
not rub them too hard. Otherwise, the graph-
ite coating could be damaged. This could
cause wiper noise.
! Hold the wiper arm securely when folding
back. The windshield could be damaged if the wiper arm smacks against it suddenly.
X Fold the windshield wiper arms away from the
windshield (Y page 123).
X Carefully clean the wiper blades with a damp
cloth.
X Fold the windshield wiper arms back again
before switching on the ignition.
Cleaning the exterior lighting !
Only use cleaning agents or cleaning cloths
which are suitable for plastic light lenses.
Unsuitable cleaning agents or cleaning cloths
could scratch or damage the plastic light len- ses.
X Clean the plastic lenses of the exterior light-
ing using a wet sponge and a mild cleaning
agent, e. g. Mercedes-Benz car shampoo or
cleaning cloths.
Cleaning the mirror turn signals !
Only use cleaning agents or cleaning cloths
that are suitable for plastic lenses. Unsuitable
cleaning agents or cleaning cloths could
scratch or damage the plastic lenses of the
mirror turn signals.
X Clean the plastic lenses of the mirror turn sig-
nals in the exterior mirror housing using a wet sponge and mild cleaning agent, e.g.
Mercedes-Benz car shampoo or cleaning
cloths.
Cleaning the side running board !
Do not clean the aluminum insert of the side
running board with alkaline or acid-based
cleaning agents, such as wheel cleaner. Do
not use acidic wheel cleaners to remove brake dust. The aluminum inserts could oth-
erwise be damaged.
Cleaning the sensors !
If you clean the sensors with a power
washer, make sure that you keep a distance
of at least 11.8 in (30 cm) between the vehicle
and the power washer nozzle. Information
about the correct distance is available from
the equipment manufacturer. X
Clean sensors 0043of the driving systems with
water, car shampoo and a soft cloth.
Cleaning the rear view camera and 360° camera !
Do not clean the camera lens and the area
around the rear view camera or 360° camera with a power washer. 330
CareMaintenance and care

a corresponding warning message will appear in
the multifunction display.
You can recognize the tire pressure loss warning
by the Run Flat Indicator Active Press Run Flat Indicator Active Press
'OK' to Restart
'OK' to Restart message which appears in
the Service
Service menu of the multifunction display.
Information on the message display can be
found in the "Restarting the tire pressure loss
warning system" section (Y page 359).
Important safety notes The tire pressure warning system does not warn
you of an incorrectly set tire pressure. Observe
the notes on the recommended tire pressure
(Y page 355).
The tire pressure loss warning does not replace
the need to regularly check the tire pressure. An even loss of pressure on several tires at the
same time cannot be detected by the tire pres-
sure loss warning system.
The tire pressure monitor is not able to warn you of a sudden loss of pressure, e.g. if the tire is
penetrated by a foreign object. In the event of a
sudden loss of pressure, bring the vehicle to a
halt by braking carefully. Avoid abrupt steering
movements.
The function of the tire pressure loss warning
system is limited or delayed if:
R snow chains are mounted on your vehicle's
tires.
R road conditions are wintry.
R you are driving on sand or gravel.
R you adopt a very sporty driving style (corner-
ing at high speeds or driving with high rates of
acceleration).
R you are driving with a heavy load (in the vehi-
cle or on the roof).
Restarting the tire pressure loss warn-
ing system Restart the tire pressure loss warning system if
you have:
R changed the tire pressure
R changed the wheels or tires
R mounted new wheels or tires
X Before restarting, make sure that the tire
pressures are set properly on all four tires for
the respective operating conditions.
The recommended tire pressure can be found on the Tire and Loading Information placard on the B-pillar. Additionally, a tire pressure
table is attached to the fuel filler flap. The tire
pressure loss warning system can only give
reliable warnings if you have set the correct
tire pressure. If an incorrect tire pressure is
set, these incorrect values will be monitored.
X Also observe the notes in the section on tire
pressures (Y page 355).
X Make sure that the SmartKey is in position 0048
in the ignition lock (Y page 140).
X Press the 0059or0065 button on the steering
wheel to select the Service
Service menu.
X Press the 0063or0064 button to select
Tire Pressure Tire Pressure.
X Press the 0076button.
The Run Flat Indicator Active Press
Run Flat Indicator Active Press
'OK' to Restart
'OK' to Restart message appears in the
multifunction display.
If you wish to confirm the restart:
X Press the 0076button.
The Tire Pressure Now OK?
Tire Pressure Now OK? message
appears in the multifunction display.
X Press the 0063or0064 button to select Yes
Yes.
X Press the 0076button.
The Run Flat Indicator Restarted
Run Flat Indicator Restarted mes-
sage appears in the multifunction display.
After a teach-in period, the tire pressure loss
warning system will monitor the set tire pres-
sures of all four tires.
If you wish to cancel the restart: X Press the 0038button.
or
X When the Tire TirePressure
Pressure Now
NowOK?
OK?message
appears, press the 0063or0064 button to
select Cancel
Cancel .
X Press the 0076button.
The tire pressure values stored at the last
restart will continue to be monitored. Tire pressure monitor
General notes If a tire pressure monitor is installed, the vehi-
cle's wheels have sensors that monitor the tire
pressures in all four tires. The tire pressure mon-
itor warns you if the pressure drops in one or
more of the tires. The tire pressure monitor only functions if the corresponding sensors are
installed in all wheels. Tire pressure
359Wheels and tires Z

sudden loss of pressure, bring the vehicle to a
halt by braking carefully. Avoid abrupt steering
movements.
The tire pressure monitor has a yellow warning
lamp in the instrument cluster for indicating
pressure loss or a malfunction. Whether the
warning lamp flashes or lights up indicates
whether a tire pressure is too low or the tire
pressure monitor is malfunctioning:
R if the warning lamp is lit continuously, the tire
pressure on one or more tires is significantly
too low. The tire pressure monitor is not mal- functioning.
R if the warning lamp flashes for approximately
a minute and then remains lit constantly, the
tire pressure monitor is malfunctioning.
In addition to the warning lamp, a message
appears in the multifunction display. Observe
the information on display messages
(Y page 268).
It may take up to ten minutes for a malfunction
of the tire pressure monitor to be indicated. A
malfunction will be indicated by the tire pres-
sure warning lamp flashing for approximately
one minute and then remaining lit. When the
malfunction has been rectified, the tire pressure warning lamp goes out after a few minutes of
driving.
The tire pressure values indicated by the on-
board computer may differ from those meas-
ured at a gas station with a pressure gauge. The
tire pressures shown by the on-board computer
refer to those measured at sea level. At high
altitudes, the tire pressure values indicated by a pressure gauge are higher than those shown by
the on-board computer. In this case, do not
reduce the tire pressures.
The operation of the tire pressure monitor can
be affected by interference from radio transmit- ting equipment (e.g. radio headphones, two-wayradios) that may be being operated in or near the
vehicle.
Checking the tire pressure electroni-
cally X
Make sure that the SmartKey is in position 0048
(Y page 140) in the ignition lock.
X Press the 0059or0065 button on the steering
wheel to select the Serv.
Serv. menu. X
Press the 0063or0064 button to select
Tire Pressure Tire Pressure.
X Press 0076.
The current tire pressure of each tire is shown in the multifunction display.
If the vehicle has been parked for longer than
20 minutes, the Tire pressure will be Tire pressure will be
displayed after driving a few minutes
displayed after driving a few minutes
message appears.
After a teach-in process, the tire pressure mon-
itor automatically detects new wheels or new
sensors. As long as a clear allocation of the tire
pressure value to the individual wheels is not
possible, the Tire
Tire Pressure Pressure Monitor
MonitorActive
Active
display message is shown instead of the tire
pressure display. The tire pressures are already being monitored.
If an emergency spare wheel is mounted, the
system may continue to show the tire pressure
of the wheel that has been removed for a few
minutes. Therefore, remember that the dis-
played tire pressure may not be the same as the
emergency spare wheel's current tire pressure.
Tire pressure monitor warning mes-
sages If the tire pressure monitor detects a pressure
loss in one or more tires, a warning message is
shown in the multifunction display. The yellow
tire pressure warning lamp then lights up.
R If the Please Correct Tire Pressure Please Correct Tire Pressure
message appears in the multifunction display, the tire pressure in at least one tire is too low.
The tire pressure must be corrected when the
opportunity arises.
R If the Check Tires Check Tires message appears in the
multifunction display, the tire pressure in at
least one tire has dropped significantly. The
tires must be checked.
R If the Warning Warning Tire
TireMalfunction
Malfunction message
appears in the multifunction display, the tire
pressure in at least one tire has dropped sud-
denly. The tires must be checked.
Be sure to observe the instructions and safety
notes in the display messages in the "Tires" sec-
tion (Y page 268).
If the positions of the wheels on the vehicle are changed, the tire pressures may be displayed in
the wrong positions for a short time. This is rec-
tified after a few minutes of driving, and the tire pressures are displayed for the correct posi-
tions. Tire pressure
361Wheels and tires Z

Lowering the vehicle
G
WARNING
The wheels could come loose if the wheel
bolts or wheel nuts are not tightened to the
prescribed tightening torque. There is a risk of an accident.
Ensure that the wheel bolts or wheel nuts are tightened to the prescribed tightening torque.
If you are not sure, do not move the vehicle.
Contact a qualified specialist workshop and
have the tightening torque checked immedi-
ately.
! Mercedes-AMG vehicles with a collapsi-
ble spare wheel: before lowering the vehicle,
inflate the collapsible spare wheel with the
tire inflation compressor. The wheel rim could
otherwise be damaged.
X Place the ratchet wrench onto the hexagon
nut of the jack so that the letters ABare visi-
ble.
X Turn the ratchet wrench until the vehicle is
once again standing firmly on the ground.
X Place the jack to one side. X
Tighten the wheel bolts evenly in a crosswise
pattern in the sequence indicated (0043 to0083).
The tightening torque must be 110 lb-ft
(150 Nm) .
X Turn the jack back to its initial position.
X Stow the jack and the rest of the tire-change
tool kit in the stowage well under the cargo
compartment floor again.
X Check the tire pressure of the newly mounted
wheel and adjust it if necessary.
Observe the recommended tire pressure
(Y page 355). When you are driving with the collapsible spare
wheel mounted, the tire pressure loss warning
system or the tire pressure monitor cannot func- tion reliably. Only restart the tire pressure loss
warning system or tire pressure monitor when
the defective wheel has been replaced with a
new wheel.
Vehicles with a tire pressure control sys-
tem: all installed wheels must be equipped with
functioning sensors. Wheel and tire combinations
Information regarding permitted wheel/tire
combinations can be found at an authorized
Mercedes-Benz Center.
! For safety reasons, Mercedes-Benz recom-
mends that you only use tires and wheels
which have been approved by Mercedes-Benz specifically for your vehicle.
These tires have been specially adapted for
use with the control systems, such as ABS or
ESP ®
, and are marked as follows:
R MO = Mercedes-Benz Original
R MOE = Mercedes-Benz Original Extended
(tires featuring run-flat characteristics)
R MO1 = Mercedes-Benz Original (only cer-
tain AMG tires)
Mercedes-Benz Original Extended tires may
only be used on wheels that have been spe-
cifically approved by Mercedes-Benz.
Only use tires, wheels or accessories tested
and approved by Mercedes-Benz. Certain
characteristics, e.g. handling, vehicle noise
emissions or fuel consumption, may other-
wise be adversely affected. In addition, when
driving with a load, tire dimension variations
could cause the tires to come into contact
with the bodywork and axle components. This
could result in damage to the tires or the vehi- cle.
Mercedes-Benz accepts no liability for dam-
age resulting from the use of tires, wheels or
accessories other than those tested and
approved.
Information on tires, wheels and approved
combinations can be obtained from any quali-fied specialist workshop.
! Retreaded tires are neither tested nor rec-
ommended by Mercedes-Benz, since previ- Wheel and tire combinations
377Wheels and tires Z