2011 MERCEDES-BENZ GL TPMS

Display messagesPossible causes/consequences and M SolutionsTire Pressure
Monitor
InoperativeThe TPMS is faulty.XVisit a qualified specialist workshop.Tire Pressure
Monitor
Inoperative No
Wheel SensorsThe wheels mounted do not have a suitable tire pressure sensor.
The tire pressure monitor is deactivated.XMount wheels with suitable tire pressure sensors.
The TPMS is activated automatically after driving for a few
minutes.Check
Tire(s)GRisk of accident
The tire pressure in one or more tires has dropped significantly.
The wheel position is displayed in the multifunction display.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XCorrect the tire pressure ( Y page 341).XIf necessary, change the wheel ( Y page 350).Caution:
Tire DefectGRisk of accident
The tire pressure in one or more tires has dropped suddenly. The
wheel position is displayed in the multifunction display.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XIf necessary, change the wheel ( Y page 350).Tire pressure(s)
Please CorrectThe tire pressure is insufficient in at least one of the tires or the
tire pressure difference between the wheels is too great. The
wheel position is displayed in the multifunction display.XCheck the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 341).XRestart the tire pressure monitor ( Y page 343).Tire Pressure
Monitor
Wheel Sensor
MissingThere is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire is not displayed in the
multifunction display.XHave the faulty tire pressure sensor replaced at a qualified
specialist workshop.Display messages249On-board computer and displaysBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 249Z

Display messagesPossible causes/consequences and M SolutionsTire Pressure
Monitor
Currently
UnavailableDue to a source of radio interference no signals can be received
from the wheel sensors. The tire pressure monitor is temporarily
malfunctioning.XDrive on.
The TPMS restarts automatically as soon as the problem has
been solved.h
Tire Pressure
Caution: Tire
DefectGRisk of accident
The tire pressure in one or more tires has dropped suddenly.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XIf necessary, change the wheel ( Y page 350).h
Tire Pressure
Check TiresGRisk of accident
The tire pressure in one or more tires has dropped significantly.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XIf necessary, change the wheel ( Y page 350).XCheck the tire pressure. If necessary, correct the tire pressure
( Y page 341).h
Please correct the
tire pressuresThe tire pressure is insufficient in at least one of the tires or the
tire pressure difference between the wheels is too great.XCheck the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 341).
Vehicle
Display messagesPossible causes/consequences and M SolutionsShift to P or N
to start engineYou have attempted to start the engine with the transmission in
position R or D. XShift the transmission to position P or N.Auxiliary Battery
MalfunctionThe auxiliary battery for the automatic transmission is no longer
being charged.XVisit a qualified specialist workshop.Depress brake
to shift out of PYou have attempted to move the transmission selector lever to
position D, R or N without depressing the brake pedal.XDepress the brake pedal.250Display messagesOn-board computer and displays
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Driving systemsProblemPossible causes/consequences and M Solutions·
The red DTR distance
warning lamp lights up
while the vehicle is in
motion. A warning tone
also sounds.GRisk of accident
A warning is issued if:
R you are approaching a vehicle in front at too great a speed
R DISTRONIC has detected a stationary obstacle in your line of
travel
XBe prepared to brake immediately.XPay careful attention to the traffic situation. You may have to
brake or take evasive action.
Tires
ProblemPossible causes/consequences and M Solutionsh
USA only:
The yellow combination
low tire pressure
telltale/TPMS
malfunction telltale for
the TPMS is on.GRisk of accident
The TPMS 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 341).XIf necessary, change a wheel ( Y page 350).h
USA only:
The yellow combination
low tire pressure
telltale/TPMS
malfunction telltale for
the TPMS flashes for 60
seconds and then
remains illuminated.The TPMS is faulty.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
260Warning and indicator lamps in the instrument clusterOn-board computer and displays
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indicated on the Tire and Loading Information placard or, if available, the tire inflation pressure
label, you should determine the proper tire inflation pressure for those tires.
As an added safety feature, your vehicle has been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pressure warning lamp when one or more of your tires
are significantly underinflated. Accordingly, when the low tire pressure warning lamp illuminates,
you should stop and check your tires as soon as possible, and inflate them to the proper pressure.
Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure.
Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling
and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance,
and it is the driver’s responsibility to maintain correct tire pressure, even if underinflation has
not reached the level to trigger illumination of the TPMS low tire pressure warning lamp.
Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS malfunction indicator is combined with the low tire
pressure warning lamp. When the system detects a malfunction, the warning lamp will flash for
approximately one minute and then remain continuously illuminated. This sequence will continue
upon subsequent vehicle start-ups as long as the malfunction exists. When the malfunction
indicator is lit, the system may not be able to detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of reasons, including the installation of incompatible
replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction warning lamp after replacing one or more tires or
wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the
TPMS to continue to function properly.Warning and indicator lamps in the instrument cluster261On-board computer and displaysBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 261Z

XMake sure that the key is in position 2
( Y page 147) in the ignition lock.XPress and hold the V or U button on
the multifunction steering wheel until the
standard display appears in the
multifunction display ( Y page 218).XPress the * or & button until the
Run Flat Indicator Active Menu: R-
Button message appears in the
multifunction display.XPress the reset button ( Y page 28) on the
instrument cluster.
The Restart Run Flat Indicator?
Yes Cancel message appears in the
multifunction display.
If you wish to confirm the restart:
XPress the W button.
The Run Flat Indicator Restarted
message appears in the multifunction
display.
After a teach-in period, the tire pressure
loss warning system will monitor the set
tire pressures of all four tires.
If you wish to cancel the restart:
XPress the X button.
or
XWait until the Restart Run Flat
Indicator? Yes Cancel message
disappears.
The tire pressure values stored at the last
restart will continue to be monitored.
Tire pressure monitoring system
(USA only)
Important safety information
The tire pressure monitoring system consists
of sensors installed in the vehicle wheels that
monitor the air pressure in all four tires. The
tire pressure monitoring system warns you
when the pressure in one or more tires
decreases. It only works when the
corresponding sensors are installed on all the
wheels.
The tire pressure monitor informs you via a
yellow warning lamp in the instrument cluster
about pressure loss or if the system is
malfunctioning. 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 up constantly, one
or more of your tires are significantly
underinflated. The tire pressure monitor is
not malfunctioning.
R If the warning lamp flashes for 60 seconds
and is then lit constantly, the tire pressure
monitor is malfunctioning.GWarning!
Each tire, including the spare (if provided),
should be checked at least once a month
when cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the tire and loading
information table on the driver's door B-pillar
or the tire inflation pressure table on the
inside of the fuel filler flap. If your vehicle has
tires of a different size than the size indicated
on the tire and loading information table or
the tire inflation pressure table, you should
determine the proper tire inflation pressure
for those tires.
As an added safety feature, your vehicle has
been equipped with a tire pressure monitor
(TPMS). An indicator lamp lights up if one or
more of your tires are significantly
underinflated. Accordingly, when the low tire
pressure indicator lamp lights up, you should
stop and check your tires as soon as possible,
and inflate them to the proper pressure.
Driving on a significantly underinflated tire
causes the tire to overheat and can lead to
tire failure.
Underinflation also reduces fuel efficiency
and tire tread life and may affect the vehicle's
handling and stopping ability. Please note that
the TPMS is not a substitute for proper tire
maintenance and it is the driver's
Tire pressures341Tires and wheelsBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 341Z

responsibility to maintain correct tire
pressure, even if underinflation has not
reached the level at which the low tire
pressure indicator lamp of the TPMS lights up.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined with
the low tire pressure indicator lamp. When the
system detects a malfunction, the indicator
lamp will flash for approximately 1 minute and
then remain illuminated. This sequence will
continue upon subsequent vehicle start-ups
as long as the malfunction exists. When the
malfunction indicator is lit, the system may
not be able to detect or signal low tire
pressure as intended.
TPMS malfunctions may occur for a variety of
reasons, including the installation of
incompatible replacement or alternate tires
or wheels on the vehicle that prevent the
TPMS from functioning properly. Always
check the TPMS malfunction indicator after
replacing one or more tires or wheels on your
vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS to
continue to function properly.
i If the tire pressure monitoring system
malfunctions, it may take up to 10 minutes
before the malfunction is displayed to you
by the tire pressure warning lamp flashing
for 60 seconds and then remaining lit.
When the error has been rectified, the tire
pressure warning lamp goes out after a few
minutes of driving.
Information on tire pressures is displayed in
the multifunction display. After a few minutes
of driving, the current tire pressure of each
tire is shown in the multifunction display.
i The tire pressure values in the on-board
computer may deviate from the inflation
pressure as measured using a tire pressure
checker at the filling station. The tire
pressures shown in the on-board computer
refer to pressures at sea level. At highaltitudes, a tire pressure checker will
display a higher tire pressure than the on-
board computer. In this case do not reduce
the tire pressure.
i If radio transmitting equipment (e.g. radio
headphones, a two-way radio) is operated
in or near the vehicle, this can lead to the
function of the tire pressure monitor being
impaired.
i This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful
interference, and
2. This device must withstand any
interference received, including
interference that may cause undesired
operation.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Checking the tire pressure
electronicallyXMake sure that the key is in position
2 (Y page 147) in the ignition lock.XPress and hold the V or U button on
the multifunction steering wheel until the
standard display appears in the
multifunction display ( Y page 218).XPress and hold the & or * button
until the current tire pressure of each tire
is shown in the multifunction display.
If the vehicle has been parked for longer than
20 minutes and subsequently you have not
driven faster than 15 mph (25 km/h), the
Tire pressure displayed after
driving for a few minutes message is
shown.
After a teach-in process, the tire pressure
monitor automatically detects new wheels or
new sensors. As long as it is not possible to
allocate tire pressure values to individual
wheel positions, the Tire Pressure
342Tire pressuresTires and wheels
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Monitor Active message appears instead
of the tire pressure display. The tire pressures
are already being monitored.
i If a spare wheel is installed, the system
may continue to show the tire pressure of
the wheel that has been removed for a few
minutes. If this occurs, note that the value
displayed for the position where the
emergency spare wheel/spare wheel is
installed is not the same as the current tire
pressure for the spare wheel.
TPMS warning messages
If the TPMS detects a significant pressure
loss on one or more tires, a warning message
is shown in the multifunction display. In
addition, a warning tone sounds and the tire
pressure warning lamp lights up in the
instrument cluster.
Each tire in which a significant pressure loss
has been detected is highlighted with a red
triangle.
Restarting the tire pressure monitoring
system
GWarning
It is the driver's responsibility to set the tire
inflation pressure to the recommended cold
tire inflation pressure. Underinflated tires
affect the ability to steer or brake the vehicle.
You might lose control over the vehicle.
When you restart the TPMS, all existing
warning messages are deleted and the
warning lamps go out. The currently set tire
pressures are adopted as the specified values
for monitoring.
The TPMS must be restarted when you set the
tire pressure to a new value (as a result of
changed handling or load characteristics, for
example). The TPMS then monitors the new
tire pressure values.
Restart the TPMS after the tire pressure has
been set, as desired, according to the
recommended values for the driving
conditions ( Y page 336). Only correct tire
pressures on cold tires. Comply with the tire
pressures recommended on the Tire and
Loading Information placard on the B-pillar on
the driver's side. Additional tire pressure
values for driving at high speeds or with heavy
loads can be found in the tire pressure table
on the inside of the fuel filler flap.XMake sure that the tire pressure is set
properly in all four tires.XMake sure that the key is in position 2 in
the ignition lock.XPress and hold the V or U button on
the multifunction steering wheel until the
standard display appears in the
multifunction display ( Y page 218).XPress and hold the & or * button
until the tire pressure of all tires or the
Tire pressure displayed after
driving for a few minutes. message
is shown.XPress the reset button on the instrument
cluster ( Y page 28).
The Restart tire pressure monitor?
Yes Cancel message appears in the
multifunction display.XTo confirm selection: press the W
button.
The Tire Pressure Monitor
Restarted message appears in the
multifunction display.
After driving for a few minutes, the system
confirms that the current tire pressure
values are within the specified range. The
new tire pressure values are then accepted
as reference values and monitored.XTo cancel restart: press the X button.
i
If the positions of the wheels on the
vehicle have been changed, the tire
pressure may be shown in the wrong
position briefly. This will be corrected after
driving for a few minutes and the tire
pressure will be displayed in the correct
position.
Tire pressures343Tires and wheelsBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 343Z

Tires of the same dimensions
i BA: Both axlesGL 350 BlueTEC
GL 450GL 550R19BAAlloy wheels
Offset8.5 J x 19 H2
2.20 in (56 mm)8.5 J x 19 H2
2.20 in (56 mm)All-weather
tires 46,
47275/55 R19 111 H M+S275/55 R19 111 H M+SWinter tires265/55 R19 109 H
M+S i 48265/55 R19 109 H
M+S iAll-terrain tires 46275/55 R19 111 H
M+S48275/55 R19 111 H M+SGL 350 BlueTEC 49
GL 450GL 550R20BAAlloy wheels
Offset8.5 J x 20 H2
2.20 in (56 mm)8.5 J x 20 H2
2.20 in (56 mm)All-weather
tires 46, 50275/50 R20 109 H M+S
MOExtended275/50 R20 109 H M+S
MOExtendedGL 350 BlueTEC
GL 450GL 550R21BA AMG alloy wheels
Offset—10 J x 21 H2
1.46 in (37 mm)All-weather tires 46—295/40 R21 111 V XL
M+S
Spare wheel
i Vehicles with MOExtended tires (tires with run-flat characteristics) are not equipped with
TIREFIT at the factory.
i The GL 350 BlueTEC is not equipped with an emergency spare wheel.
46
Use of snow chains not permitted.
47 GL 350 BlueTEC: Canada only.
48 GL 350 BlueTEC (USA only): standard tires without run-flat characteristics. Retrofitting a TIREFIT kit is
recommended.
49 USA only.
50 Tires with run-flat characteristics must only be used in conjunction with an activated tire pressure loss
warning system or TPMS.Wheel/tire combinations359Tires and wheelsBA 164.8 USA, CA Edition B 2011; 1; 2, en-USd2sboikeVersion: 3.0.3.52010-04-21T15:08:44+02:00 - Seite 359Z