The tire pressure monitor has ay ellow warning
lamp in the instrument cluster for indicating
pressure loss or am alfunction. Whether the
warning lamp flashes or lights up indicates
whether at ire 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 around a
minute and then remains lit constantly, the
tire pressure monitor is malfunctioning.
In addition to the warning lamp, am essage
appears in the multifunction display .O bserve
the information on display messages
( Y
page 211).
It may take up to ten minutes for am alfunction
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 af ew minutes of
driving.
The tire pressure values indicated by the on-
board computer may differ from those meas-
ured at ag as station with ap ressure 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 interferenc ef rom radio transmit-
ting equipment (e.g. radio headphones, two-way
radios) that may be being operated in or near the
vehicle.
Checking the tire pressur ee lectroni-
cally X
Make sure that the SmartKey is in position H
in the ignition lock ( Y
page 122).X
Press Y or e on the steerin gw heel to
select the Serv. menu.X
Press the c or d button to select
Tire Pressure .X
Press the v button.
The current tire pressure of each tire is shown
in the multifunction display. If the vehicle was parked for longer than
20 minutes, the Tire pressure will be
displayed after driving af ew minutes
message is shown.
After at each-in process, the tire pressure mon-
itor automatically detect sn ew wheels or new
sensors. As long as ac lear allocation of the tire
pressure value to the individual wheels is not
possible, the Tire Pressure Monitor Active
message is shown instead of the tire pressure
display .T he tire pressures are already being
monitored.
If an emergenc ys pare wheel is mounted, the
system may continue to show the tire pressure
of the wheel that has been removed for af ew
minutes. If this occurs, not et hat the value dis-
played for the position where the spare wheel is
mounted is not the same as the current tire
pressure of the emergenc ys pare wheel.
Tire pressur em onitor warning mes-
sages If the tire pressure monitor detect sap ressure
loss in one or more tires, aw arning message is
shown in the multifunction display .T he yellow
tire pressure warning lamp then lights up. R
If the 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
opportunit ya rises. R
If the Check Tire Pressure message
appears in the multifunction display ,t he tire
pressure in one or more tires has dropped
significantly. The tires must be checked. R
If the Tire Pressure Warning Tire Fail‐
ure message appears, the tire pressure in one
or more tires has dropped suddenly. The tires
must be checked.
Observe the instructions and safety notes in the
display messages in the "Tires" section
( Y
page 211).
If the wheel positions on the vehicle are rotated,
the tire pressures may be displayed for the
wrong positions for as hort time. This is rectified
after af ew minutes of driving, and the tire pres-
sures are displayed for the correc tp ositions.296
Tir ep re ssure
Wheels and tires
Information regardin gt echnica ld at a
i The dat as ta te dh er es pecifically refers to a
vehicl ew it hs ta ndard equipment. Consult an
authorize dM ercedes-Ben zC ente rf or th e
dat af or all vehicl ev ariants and trim levels.
Vehicle electronics
Installing two-way radio sa nd mobile
phones (RF transmitters)
G WARNIN G
The electromagneti cr adiation from modifie d
or incorrectl yr etrofitte dR F-transmitters can
interfere wit ht he vehicl ee lectronics .T his can
compromise th eo perational safet yoft he
vehicle. Ther eisar is kofana ccident.
You should hav ea ll wor ktoe lectrical and
electronic equipmen tc arried out at aq ualified
specialist workshop.
G WARNIN G
The electromagneti cr adiation from incor-
rectl yo perate dRFt ra nsmitters can interfere
wit ht he vehicl ee lectronics ,f or example:R
if th eRFt ra nsmitte risn ot connecte dw it h
an exterio ra ntennaR
th ee xter io ra ntenna has been installed
incorrectl yorisn ot al ow-reflection typ e
This can compromise th eo perational safet y
of th ev ehicle. Ther eisar is kofana ccident.
Hav et he low-reflection exterio ra ntenna
mounte dataq ualified specialist workshop.
When operating RF transmitters in th ev ehi-
cle ,a lways connec tt he mw it ht he low-reflec -
tion exterio ra ntenna.
! The operating permit may be invalidated if
th ei nstruction sf or installation and use of RF
transmitters are no to bserved. In particular, th ef ollowin gc onditi on sm ust be
complied with: R
only approve dw avebands may be used. R
observ et he maximum permissible output
in these wavebands. R
only approve da ntenna position sm ay be
used.
Excessiv el evels of electromagneti cr adiation
may caus ed amag etoy our healt ha nd th eh ealt h
of others. Using an exterio ra ntenna takes int o
accoun tc urren ts ci entific discussion sr elating
to th ep ossible healt hh azards that may result
from electromagneti cf ields.
Approved antenna position s
C
Fron tr oo fa rea D
Rear roo fa rea
The maximum transmission output (PEAK )att he
base of the antenna must not exceed the fol-
lowing values:
Frequency band Maximum
transmission
output
Short wave
3-54M Hz 100 W
4mw aveband
74 -88M Hz 30 W
2mw aveband
144 -1 74 MHz 50 W
Trunked radio system/
Tetra
380 -4 60 MHz 10 W
70 cm waveband
400 -4 60 MHz 35 W
Mobile communications
(2G/3G/4G) 10 W
The following can be used in the vehicle without
restrictions: R
RF transmitters with am aximum transmis-
sion output of up to 100 mW R
RF transmitters with transmitter frequencies
in the 380 -4 10 MHz frequency band and a
maximum transmission output of up to 2W
(trunked radio system/Tetra) R
Mobile phones (2G/3G/4G)
There is no restriction for antenna positions on
the outside of the vehicle for the following fre-
quency bands: R
Trunked radio system/Tetra R
70 cm waveband R
2G/3G/4G Identification plates
Vehicle identification plat ew ith vehi-
cle identification number (VIN) X
Open the driver's door.
You will see vehicle identification plate C .
Example: vehicle identification plate (USA only)
C
VIN D
Paint code
Example: vehicle identification plate (Canada only)
C
VIN
D
Paint code
i The data shown on the vehicle identification
plate is used only as an example. This data is314
Identification plates
Technical data
