2017 MERCEDES-BENZ G-Class TPMS

Checking thetirep ressures
Important safety notes
Observ ethe note sont irep ressure
(Ypage 254).
Information on air pressure for th etires on your
vehicle can be found:
Ron th evehicle's Tire and Loading Information
placard on th eB-pillar
Rin th etirep ressure table in th efuel fille rflap
(Ypage 119)
Runde r"Tire pressure "(Ypage 254)
Checking tir epressures manually
To determine and set th ecorrec ttirep ressure,
procee dasfollows:
XRemove th evalvec ap of th etiret hatistob e
checked.
XPress th etirep ressure gage securely onto the
valve.
XRead th etirep ressure and compare it to the
recommended value on th eTire and Loading
Information placard or th etirep ressure table
(
Ypage 254).
XIf th etirep ressure is to olow, increas ethe tire
pressure to th erecommended value.
XIf th etirep ressure is to ohigh,r elease air. To
do so, pres sdown th emetal pin in th evalve,
usingt hetip of apen for example .Then check
th et irep ressure again usingt hetirep ressure
checker.
XScrew th evalvec ap onto th evalve.
XRepeat these steps for th eother tires.
Tir ep ressure monitor
General notes
If at irep ressure monito risinstalled, th evehi-
cle's wheelsh ave sensorsthatm onito rthe tire
pressure sinall four tires. The tir epressure mon-
ito rw arn syou if th epressure drops in oneo r
mor eoft hetires. The tir epressure monito ronly
functionsift hecorrespondings ensorsare
installed in all wheels.
Information on tir epressure sisdisplayed in the
multifunction display. The curren ttirep ressure
of each wheel is shown in the Serv.
menuafter
driving for afew minutes.
Information on th emessage display can be
foun dint he"Checkin gthe tirep ressure elec-
tronically" sectio n(
Ypage 258).
Important safety notes
GWARNING
Eac htire, includingt hespare( if provided),
should be checked at least once amonth
when col dand inflate dtothepressure rec-
ommended by th evehicle manufacturer on
th eT ire and Loading Information placard on
th ed river'sd oor B-pillar or th etirep ressure
label on th einside of th efuel fille rflap. If your
vehicle has tires of adifferent sizet hant he
sizei ndicated on th eTire and Loading Infor-
mation placard or th etirep ressure label, you
should determine th eproper tir epressure for
those tires.
As an added safety feature, your vehicle has
been equipped withat irep ressure monitoring
system (TPMS) that illuminate salow tir epres-
sure telltale when oneorm oreofy our tires
are significantly underinflated. Accordingly,
when th elow tir epressure telltale illuminates,
you should stop and check your tires as soon
as possible, and inflate them to th eproper
pressure .Drivin gonas ignificantly underin-
flated tir ecauses th etiretoo verheat and can
lead to tir efailure. Underinflation also
reduces fuel efficienc yand tir etread life ,and
may affect th evehicle's handlinga nd stop-
pinga bility.
Pleasen otet hatthe TPMS is no tasubstitute
for proper tir emaintenance, and it is th edriv-
er'sr esponsibility to maintain correc ttire
pressure ,evenifu nderinflation has not
reached thel evelt otrigger illuminat
ionoft he
TPMS low tir epressure telltale.
USAo nly:
Tir ep ressure257
Wheels and tires
Z

Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate if the
systemisn ot operating properly. The TPMS
malfunction indicator is combined with the
low tir epressure telltale. When the system
detects amalfunction, the warnin glamp will
flash for approximately aminut eand then
remain continuously illuminated. This
sequence will be repeated every tim ethe vehi-
cle is started as long as the malfunction
exists.
When the malfunction indicator is illuminated,
the syste mmay not be able to detec torsignal
low tir epressure as intended .TPMS malfunc-
tion smay occur for avarietyofr easons,
including the mountin gofincompatible
replacementora lternatetires or wheels on
the vehicle that prevent the TPMS from func-
tioning properly. Always chec kthe TPMS mal-
function telltale afte rreplacing one or more
tires or wheels on your vehicle to ensur ethat
the replacementora lternatetires and wheels
allow the TPMS to continue to function prop-
erly.
It is the driver's responsibility to set the tire
pressure to that recommended for cold tires
which is suitable for the operating situation
(
Ypage 254). Notet hat the correcttirep ressure
for the current operating situation must firstb e
taught-in to the tir epressure monitor .Ifasub-
stantial loss of pressure occurs, the warning
threshold for the warnin gmessageisa ligned to
the taught-in reference values. Restar tthe tire
pressure monitor afte radjusting the pressure of
the cold tires (
Ypage 259). The current pres-
sures are saved as new reference values. As a
result,aw arningmessagew ill appear if the tire
pressure drops significan tly.
The t

ir ep ressure monitor does not warn you of
an incorrectly set tir epressure. Observe the
notes on the recommended tir epressure
(
Ypage 254).
The tir epressure monitor is not able to warn you
of as udden loss of pressure, e.g. if the tir eis
penetrate dbyaforeign object .Inthe eventofa
sudden loss of pressure, bringt he vehicle to a
halt by braking carefully. Avoid abrupt steering
movements.
The tir epressure monitor has ayellow h
warnin glamp on the instrumentc luster for indi-cating
apressure loss or malfunction. The way
that the warnin glamp flashes or lightsupi ndi-
cates whether atirep ressure is too low or
whether the tir epressure monitor is malfunc-
tioning:
Rif the h warnin glamp is lit continuously,
the tir epressure in one or more tires is sig-
nificantly too low. The tir epressure monitor is
not malfunctioning.
Rif the h warnin glamp flashes for around a
minut eand the nremainsl it constantly, the
tir ep ressure monitor is malfunctioning.
In addition to the hwarnin glamp, amessage
appears in the multifunction display. Observe
the information on display messages
(
Ypage 183).
It may tak euptoten minutes for amalfunction
of the tir epressure monitor to be indicated. The
malfunction is indicated firstbyt heh tire
pressure warnin glamp flashingf or approx-
imately one minut eand the nremaining lit. If the
malfunction has been rectified, the htire
pressure warnin glamp goes out afte rdrivingf or
af ew minutes.
The tir epressure values indicated by the on-
board computer may differf rom those meas-
ured at agas st

ation with apressure gauge. The
tir ep ressures shown by the on-board computer
refertot hose measured at sea level. At high
altitudes, the tir epressure values indicated by a
pressure gauge are higher than those shown by
the on-board computer .Inthis case, do not
reduce the tir epressures.
The operation of the tir epressure monitor can
be affected by interference from radio transmit-
tin ge quipment( e.g. radio headphones, two-way
radios) that may be being operated in or near the
vehicle.
Checking th etirep ressuree lectroni-
cally
XMake sure that the SmartKey is in position 2
in the ignition lock.
XPress the =or; button on the steering
wheel to selectt heServ.menu.
XPress the 9or: button to select
Tire Pressure.
XPress the abutton.
The multifunction display shows the current
tir ep ressure of each wheel.
If the vehicle has been parked for over
20 minutes, the Tire pressure will be
258Tirep ressure
Wheels and tires