Mercedes-Benz G 550 2015 Operator's Manual page 239

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 val-
ues 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 trans-
mitting equipment (e.g. radio headphones,
two-way radios) that may be being operated
in or near the vehicle.
USA only:
i
This device complies with part 15 of the
FCC Rules. Operation is subject to the fol-
lowing two conditions:
1. This device may not cause harmful inter-
ference, and
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Canada only:
i
This device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause harmful inter-
ference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Checking the tire pressure electroni-
cally
Make sure that the SmartKey is in posi-
X
tion 2 in the ignition lock (
Press the = or ; button on the steer-
X
ing wheel to select the
Press the 9 or : button to select
X
Tire
Press the a button.
X
The current tire pressure of each tire is
shown in the multifunction display.
If the vehicle has been parked for over
20 minutes, the
displayed after driving a few
minutes
After a teach-in process, the tire pressure
monitor 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
Monitor Active
instead of the tire pressure display. The tire
pressures are already being monitored.
i
may continue to show the tire pressure of
the wheel that has been removed for a few
minutes. Observe that the displayed value
is not the same as the current tire pressure
of the emergency spare wheel.
Tire pressure monitor warning mes-
sages
If the tire pressure monitor detects a signifi-
cant pressure loss on one or more tires, a
warning message is shown in the multifunc-
tion display. A warning tone also sounds and
the tire pressure warning lamp lights up in the
instrument cluster.
Each tire that is affected by a significant loss
of pressure is highlighted in the pressure dis-
play.
If the
X
appears in the multifunction display, check
the tire pressure on all four wheels and cor-
rect it if necessary.
If the
X
multifunction display, the tire pressure in
page 103).
Y
one or more tires has dropped significantly
and the tires must be checked.
Serv.
menu.
If the
X
Tire Malfunction
Tire pressure
Pressure.
Tire pressure will be
message appears.
Tire Pressure
display message is shown
If a spare wheel is mounted, the system
Correct Tire Pressure
Check Tires
message appears in the
Tire Press. Warning Caution
message appears in
237
message
Z