2017 MERCEDES-BENZ S CLASS radio

trigger illumination of the TPMS low tire pres-
sure telltale.
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 telltale. When the sys-
tem detects a malfunction, the warning lamp
will flash for approximately a minute and then
remain continuously illuminated. This
sequence will be repeated every time the vehi-
cle is started as long as the malfunction
exists. When the malfunction indicator is illu-
minated, 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 incom-
patible replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale 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.
It is the driver's responsibility to set the tire
pressure to that recommended for cold tires
which is suita
ble fo r the operating situation
( Y
page 346). Note that the correct tire pressure
for the current operating situation must first be
taught-in to the tire pressure monitor. If a sub-
stantial loss of pressure occurs, the warning
threshold for the warning message is aligned to
the taught-in reference values. Restart the tire
pressure monitor after adjusting the pressure of
the cold tires ( Y
page 351). The current pres-
sures are saved as new reference values. As a
result, a warning message will appear if the tire
pressure drops significantly.
The tire pressure monitor does not warn you of
an incorrectly set tire pressure. Observe the
notes on the recommended tire pressure
( Y
page 346).
The tire pressure monitor is not able to warn you
of a sudden loss of pressure, e.g. if the tire is
penetrated by a foreign object. In the event of a
sudden loss of pressure, bring the vehicle to a
halt by braking carefully. Avoid abrupt steering
movements. The tire pressure monitor has a yellow warning
lamp in the instrument cluster for indicating
pressure loss or a malfunction. 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 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, a message
appears in the multifunction display. Observe
the information on display messages
( Y
page 252).
It may take up to ten minutes for a malfunction
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 a few minutes of
driving.
The tire pressure values indicated by the on-
board computer may differ from those meas-
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 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 .
T h e operation of the tire pressure monitor can
be affected by interference from radio transmit-
ting equipment (e.g. radio headphones, two-way
radios) that may be being operated in or near the
vehicle.
Checking the tire pressure electroni-
cally X
Make sure that the SmartKey is in position 2
in the ignition lock ( Y
page 145).X
Use

Radio type approval for the tire pres-
sure monitor Country Radio type approval number
USA FCC ID: MRXMW2433A
FCC ID: MRXGG4
FCC ID: MRXMC34MA4
Canada IC: 2546A-MW2433A
IC: 2546A-GG4
IC: 2546A-MC34MA4
Tire pressure loss warning system
(Canada only)
General notes While the vehicle is in motion, the tire pressure
loss warning system monitors the set tire pres-
sure using the rotational speed of the wheels.
This enables the system to detect significant
pressure loss in a tire. If the speed of rotation of
a wheel changes as a result of a loss of pressure,
a corresponding warning message will appear in
the multifunction display.
You can recognize the tire pressure loss warning
by the Run Flat Indicator Active Press
'OK' to Restart message which appears in
the Service menu of the multifunction display.
Information on the message display can be
found in the "Restarting the tire pressure loss
warning system" section ( Y
page 352).
Important safety notes The tire pressure warning system does not warn
you of an incorrectly set tire pressure. Observe
the notes on the recommended tire pressure
( Y
page 346).
The tire pressure loss warning does not replace
the need to regularly check the tire pressure. An
even loss of pressure on several tires at the
same time cannot be detected by the tire pres-
sure loss warning system.
The tire pressure monitor is not able to warn you
of a sudden loss of pressure, e.g. if the tire is
penetrated by a foreign object. In the event of a
sudden loss of pressure, bring the vehicle to a
halt by braking carefully. Avoid abrupt steering
movements. The function of the tire pressure loss warning
system is limited or delayed if: R
snow chains are mounted on your vehicle's
tires. R
road conditions are wintry. R
you are driving on sand or gravel. R
you adopt a very sporty driving style (corner-
ing at high speeds or driving with high rates of
acceleration). R
you are driving with a heavy load (in the vehi-
cle or on the roof).
Restarting the tire pressure loss warn-
ing system Restart the tire pressure loss warning system if
you have: R
changed the tire pressure R
changed the wheels or tires R
mounted new wheels or tires X
Before restarting, make sure that the tire
pressures are set properly on all four tires for
the respective operating conditions.
The recommended tire pressure can be found
on the Tire and Loading Information placard
on the B-pillar on the driver's side. Addition-
ally, a tire pressure table is attached to the
fuel filler flap. The tire pressure loss warning
system can only give reliable warnings if you
have set the correct tire pressure. If an incor-
rect tire pressure is set, these incorrect val-
ues will be monitored. X
Also observe the notes in the section on tire
pressures ( Y
page 346). X
Make sure that the SmartKey is in position 2
in the ignition lock ( Y
page 145).X
Use

Information regarding technical data Hybrid vehicles: mak e sur e that you read th e
separat e operating instructions. Otherwise, you
may no t recognize dangers.
i The dat a state d her e specifically refers to a
vehicl e wit h standard equipment. Consult an
authorize d Mercedes-Ben z Cente r for th e
dat a for all vehicl e variants and trim levels.
Vehicle electronics
Installing two-way radios and mobile
phones (RF transmitters)
G WARNIN G
The electromagneti c radiation from modifie d
or incorrectl y retrofitte d RF-transmitters can
interfere wit h th e vehicl e electronics . This can
compromise th e operational safet y of th e
vehicle. Ther e is a ris k of an accident.
You should hav e all wor k to electrical and
electronic equipmen t carried out at a qualified
specialist workshop.
G WARNIN G
The electromagneti c radiation from incor-
rectl y operate d RF transmitters can interfere
wit h th e vehicl e electronics , for example:R
if th e RF transmitte r is no t connecte d wit h
an exterio r antennaR
th e exterio r antenna has been installed
incorrectl y or is no t a low-reflection typ e
This can compromise th e operational safet y
of th e vehicle. Ther e is a ris k of an accident.
Hav e th e low-reflection exterio r antenna
mounte d at a qualified specialist workshop.
When operating RF transmitters in th e vehi-
cle , always connec t them wit h th e low-reflec -
tion exterio r antenna.
! The operating permit may be invalidated if
th e instruction s for installation and use of RF
transmitters are no t observed. In particular, th e followin g condition s must be
complied with: R
only approve d wavebands may be used. R
observ e th e maximum permissible output
in these wavebands. R
only approve d antenna position s may be
used.
Excessiv e levels of electromagneti c radiation
may caus e damag e to your healt h and th e healt h
of others. Using an exterio r antenna takes int o
accoun t curren t scientific discussion s relating
to th e possible healt h hazards that may result
from electro magneti c fi
elds.
Approved antenna position s (example:
Mercedes ‑ Maybach)
C
Fron t roo f areaD
Rear roo f area

The maximum transmission output (PEAK) at the
base of the antenna must not exceed the fol-
lowing values:
Frequency band Maximum
transmission
output
Short wave
3 - 54 MHz 100 W
4 m waveband
74 - 78 MHz 30 W
2 m waveband
144 - 174 MHz 50 W
Trunked radio system/
Tetra
380 - 460 MHz 10 W
70 cm waveband
400 - 460 MHz 35 W
Mobile communications
(2G/3G/4G) 10 W
The following can be used in the vehicle without
restrictions: R
RF transmitters with a maximum transmis-
sion output of up to 100 mW R
RF transmitters with transmitter frequencies
in the 380 - 410 MHz frequency band and a
maximum transmission output of up to 2 W
(trunked radio system/Tetra) R
Mobile phones (2G/3G/4G)
There are no restrictions when positioning the
antenna on the outside of the vehicle for the
following wavebands: R
Trunked radio system/Tetra R
70 cm waveband R
2G/3G/4G Identification plates
Vehicle identification plate with vehi-
cle identification number (VIN)
Location of vehicle identification plate (exam-
ple, left-hand-drive vehicle) X
Open the front left-hand door.
You will see vehicle identification plate C .
Example: vehicle identification plate (USA only)
C
VIN D
Vehicle model
Example: vehicle identification plate (Canada only)
C
VIN
D
Paint code370
Identification plates
Technical data