phone MERCEDES-BENZ M-CLASS SUV 2011 Owner's Manual

tyre is penetrated by
aforeign object .Inthe
event of asudden loss of pressure, bring the
vehicl etoah altbyb rakingcarefully. Do not
make any sudden steering movements when
doing so.
Informatio nontyre pressures is displayed in
the multifunction display. After afew minutes
of driv ing, the curren ttyre pressure of each
tyre is sho wn inthe multifunction display.
i Thet yre pressure values indicated by the
on-board computer may differ from those
measured at afilling station with apressure
gauge. Th etyre pressures shown by the on-
board computer refer to thos emeasured at
sea level. At high altitudes, the tyr epres-
sure values indicated by apressure gauge
are higher than thos eshown by the on-
boar dcomputer .Inthis case ,donot reduce
the tyr epressures.
i Theo peration of the tyr epressure moni-
to rc an be affected by interference from
radio transmitting equipment (e.g. radio
headphones ,two-way radios) that may be
being operated in or near the vehicle.
Checking tyr epressure electronically X
Make sure that the key is in position 2
(Y page 139) in the ignitio nlock.
X Press the =or; button on the steer-
ing wheel to select the Serv. menu.
X Press the 9or: button to select
Tyre pressure .
X Press the abutton.
The curren ttyre pressure for each wheel
will be displayed in the multifunction dis-
play.
If the vehicle has been parked for longe rthan
20 minutes, the Tyre pressures will be
displaye
dafter afew minutes of driving message appe
ars.
After ateach-in period, the tyr epressure
monito rautomatically recognise snew
wheels or new sensors. As long as aclear
allocation of the tyre pressure values to the individual wheels is not possible
,the Tyre pressure monito
ractive displa
ymes-
sage is shown instead of the tyr epressure
display. Th etyre pressures are already being
monitored.
i Ifas pare wheel/emergenc yspare wheel
is fitted, the system may continue to show
the tyr epressure of th ewheel that has
been removed for afew minutes. If this
occurs, note that the value displayed for
the position where the spare wheel/emer-
gency spare wheel is fitted is not the same
as the spare wheel/emergenc yspare
wheel's current tyr epressure.
Tyre pressure monito rwarning mes-
sages If the tyre pressure monitor detects
asignifi-
cant pressure loss on one or more tyres, a
warnin gmessage is shown in the multifunc-
tion display. Awarning ton ealso sounds and
th et yrep ressure warning lamp ligh tsup in
the instrumen tcluster.
Eac htyret hat is affected by asignificant loss
of pressure is highlighted in th epressure dis-
play.
If the Please correc ttyrep ressure messag
eappear sinthe multifunctio ndis-
play:
X Chec kthe tyr epressure on all fou rwheels
and correc titifn ecessary.
i If the wheel positions on the vehicle are
inter changed, the tyre pressures may be
displ ayed for th ewrong positions for a
short time .This is rectified after afew
minutes of driving, and the tyr epressures
are displayed for th ecorrect positions.
Restarting th etyre pressure monitor When yo
urestar tthe tyr epressure monitor,
all existing warning message sare deleted and
th ew arning lamps go out. The monitor uses
the currently set tyre pressures as the refer-
ence values for monitoring. In most cases, the
tyre pressure monitor will automatically 362
Tyr
epressureWheels and tyres

H
Environmenta
lnote
Daimler AG also supplies reconditioned
assemblies and part swhicha re of the same
quality as new parts. For these, the same war-
ranty applie sasfor new par ts.
Always spe cify the vehicle identificatio nnum-
ber (VIN )(Y page 372) and th eengine num-
ber (Y page373)w hen orderi nggenuine
Mercedes-Ben zparts. Vehicle electronics
Tampering with th
eengine electron-
ics G
WA
RNING
Only have work on the engin eelectronics and
related component scarried out at aqualified
specialist workshop which has the necessary
specialist knowledge and tools to carry out
the work required .Mercedes-Ben zrecom-
mends that you use aMercedes-Ben zService
Centr efor this purpose. In particular ,work
relevant to safet yoronsafety-related sys-
tems must be carried out at aqualified spe-
cialist workshop .Otherwise, the vehicle's
roadworthiness could be affected.
! Only have maintenanc ework on the
engin eelectronics and its associated parts,
such as control units, sensor sand connec-
tor leads, carried out at aqualified special-
ist workshop, e.g. aMercedes-Benz Ser vice
Centre. Vehicle compo nentsm ay other-
wise wear mor equickly and the vehicle's
operatin gpermit may be invalidated. Retrofitting of two-way radios and
mobile phones (RF transmitters)
Use th eTechnical Specification
ISO/TS 21609 30
implementation regulation
when retrofitting RF (radi ofrequency) trans-
mitters. If your vehicle has fittings for two-way radio
equipment, use th
epower supply or aerial
connection sintended for use with the basic
wiring. Be sure to obser vethe manufacturer's
additional instructions when installing the fit-
tings.
! Hav eaftermarket radi ofrequency trans-
mittin gequipmen tinstalled at aquali fied
sp ec ialist worksho p. Mercedes-Benz rec-
ommends that you use aMercedes-Benz
Ser vice Centre for thi spurpose.
The transmission output at the aerial base
must not exceed the maximum values below. Waveband Maximum trans-
mission output
(PEAK)
Short wave
(f
<54M Hz) 100 W
4mw
aveband 30 W
2mw
aveband 50 W
Trunked radio/Tetra 35 W
70 cm waveband 35 W
GSM 900/AMPS 10 W
GSM 1800 10 W
UMTS 10 W
The following aerial positions may be used if
RF transmitters have been properly installed:
30 ISO/TS 216 09–Technical Specification for Road Vehicles (EMC) guidelines for installation of aftermarket
radio frequenc ytransmitting equipment. Vehicle electronics
371Technicaldata Z