2015 MERCEDES-BENZ SLS AMG GT ROADSTER warning

If the tire pressure is not set correctly, this
can leadtoane xcessive build up of heat and
as udden loss of pressure.
For more information, contact aqualified spe-
cialist workshop. Important notes on tire pressure
G
WARNING
If the tire pressure drops repeatedly,t he
wheel, valve or tire may be damaged. Tire
pressure that is too low may resultina tire
blow-out. There is arisk of an accident.
R Check the tire for foreign objects.
R Check whether the wheelisl osing air or the
valve is leaking.
If you are unabletor ectify the damage, con-
tact aqualifieds pecialist workshop. G
WARNING
If you fit unsuitable accessorie sonto tire
valves ,the tire valves may be overloaded and
malfunction, which can cause tire pressure
loss. Due to their design, retrofitted tire pres- sure monitors keep the tire valve open. This
can also resultint ire pressure loss. There is a
risk of an accident.
Only screw the standard valve cap or other
valve caps approved by Mercedes-Benz for
yourv ehicle onto the tire valve.
Use asuitable pressure gauge to check the
tire pressure. The outer appearance of atire
does not permit any reliable conclusion about the tire pressure. On vehicle sequippedw ith
the electronic tire pressure monitor, the tire
pressure can be checked in the on-board
computer.
The tire temperature and pressure increase
when the vehicle is in motion. This is depend-
ent on the driving speed and the load.
Therefore ,you shouldo nly correct tire pres-
sures when the tires are cold. The tires are cold:
R if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
R if the vehicle has not been driven further
than 1mile (1.6 km)
The tire temperature changes depending on
the outsid etemperature ,the vehicle speed
and the tire load. If the tire temperature
changes by 18 ‡(10 †), the tire pressure
changes by approximately 10 kPa (0.1 bar/
1.5 psi).T ake this into account when check-
ing the pressure of warm tires. Only correct
the tire pressure if it is too low for the current
operating conditions. If you check the tire
pressure when the tires are warm, the result- ing valuew illbeh igherthan if the tires were
cold. This is normal. Do not reduce the tire
pressure to the values pecified for cold tires.
The tire pressure would otherwis ebetoo low.
Observe the recommended tire pressures for
cold tires:
R on the Tire and Loading Information placard
on the B-pilla ronthe driver's side
R in the tire pressure table on the inside of the
fuel filler flap Underinflated or overinflated tires
Underinflated tires G
WARNING
Tires with pressure that is too low can over-
heat and burst as aconsequence. In addition,
they also suffer from excessive and/or irreg-
ularw ear, which can severel yimpair the brak-
ing propertie sand the driving characteristics.
There is arisk of an accident.
Avoid tire pressures that are too low in all the
tires, including the spare wheel.
Underinflated tires may:
R overheat, leading to tire defects
R adversely affect handling Tire pressure
255Wheelsand tires Z

R
wear excessively and/or unevenly
R have an adverse effect on fuel consumption
Overinflated tires G
WARNING
Tires with excessively high pressure can burst
because they are damage dmoree asily by
road debris, potholes etc .Inaddition ,they
also suffer fro mirregular wear, whic hcan
severely impair th ebraking properties and the
driving characteristics. Ther eisarisk of an
accident.
Avoid tir epressures that are to ohigh in all the
tires, including th espare wheel.
Overinflated tires may: R increase th ebraking distance
R adversely affect handling
R wear excessively and/or unevenly
R have an adverse effect on ride comfort
R be mor esusceptible to damage
Maximum tir epressures 0043
Example: maximum permissible tir epres-
sure
Never exceed th emaximum permissible tire
inflatio npressure. Always observe th erec-
ommended tir epressure for your vehicle
when adjustin gthe tirep ressure
(Y page 253).
i The actual values for tires are vehicle-
specific and may deviat efromt hevalues in
th ei llustration. Checkin
gthe tirep ressures
Important safety notes Observe th
enotes on tir epressure
(Y page 253).
Information on air pressure for th etires on
your vehicle can be found:
R on th evehicle' sTire and Loadin gInforma-
tio np lacar dont heB-pillar (Y page 260)
R on th etirep ressure label on th efuel filler
flap (Y page 129)
R in th e"Tire pressure" sectio n(Ypage 253).
Checkin gtirep ressures manually To determine and set th
ecorrec ttirep res-
sure, proceed as follows:
X Remov ethe valve cap of th etiret hatisto
be checked.
X Pres sthe tirep ressure gauge securely onto
th ev alve.
X Read th etirep ressure and compare it with
th er ecommended value on th eTire and
Loadin gInformation placar dontheB-pillar
on th edriver' sside of your vehicle.
X If necessary, increase th etirep ressure to
th er ecommended value (Y page 253).
X If th etirep ressure is to ohigh, releas eair by
pressin gdown th emetal pin in th evalve
usin gthe tip of apen,for example. Then
check th etirep ressure again usin gthe tire
pressure checker.
X Screw th evalve cap ont othe valve.
X Repeat these steps for th eother tires. Tir
ep ressur emonitor
General notes If
at irep ressure monito risinstalled, th evehi-
cle' swheels have sensor sthatm onito rthe
tir ep ressures in all four tires. The tir epres-
sure monito rwarn syou if th epressure drops
in one or mor eofthetires. The tir epressure 256
Tir
ep ressureWheels and tires

monitor only functions if the correct sensors
are installed on all wheels.
Information on tire pressures is displayed in
the multifunction display.A fterafew minutes
of driving, the current tire pressure of each
tire is show nintheService Service menu of the mul-
tifunction display. Example
For informatio nonthe message display,r efer
to the "Checking the tire pressure electroni-
cally" section (Y page258).
Important safety notes G
WARNING
Each tire, including the spare (if provided),
should be checked at least once every two
weeks when cold and inflated to the pressure recommended by the vehicl emanufacturer
on the Tire and Loading Information placard
on the driver' sdoor B-pillar or the tire pres-
sure label on the inside of the fuel filler flap .If
yourv ehiclehas tires of adifferent size than
the size indicated on the Tire and Loading
Information placard or, if available, the tire
pressure label, you should determine the
prope rtire pressure for those tires.
As an added safety feature ,you rv ehicl ehas
been equippe dwithatire pressure monitoring
system (TPMS) that illuminates alow tire pres-
sure telltal ewhen one or more of yourt ires
are significantly underinflated. Accordingly,
when the low tire pressure telltal elights up,
you should stop and check yourt ires as soon
as possible, and inflate them to the proper
pressure. Driving on asignificantly underin-
flated tire cause sthe tire to overhea tand can
leadtot ire failure. Underinflation alsor
educes fuel efficiency
and tire tread life ,and may affect the vehicle's
handling and stopping ability .Please note that
the TPMS is not asubstitute for prope rtire
maintenance, and it is the driver' sresponsi-
bility to maintai ncorrect tire pressure, even if
underinflation has not reache dthe level to
trigger illumination of the TPMS low tire pres-
sure telltale.
Yourv ehiclehas alsob een equippe dwith 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 amalfunction, the warning lamp
willf lashf or approximatel yaminute and then
remai ncontinuously illuminated. This
sequence willber epeated 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 abletod etect
or signa llow tire pressure as intended.
TPMS malfunctions may occur for avariety of
reasons, including the installation of incom-
patible replacement or alternate tires or
wheels on the vehicl ethat prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltal eafter replacing one
or more tires or wheels on yourv ehicleto
ensure that the replacement or alternate Tires
and wheels allow the TPMS to continue to
function properly.
It is the driver' sresponsibility to set the tire
pressure to that recommended for cold tires
which is suitable for the operating situation
(Y page2 53).Note that the correct tire pres-
sure for the current operating situation must
first be taught-in to the tire pressure monitor.
If there is asubstantial loss of pressure, the
warning threshol dfor the warning message is
aligned to the reference values taught-in.
Restart the tire pressure monitor after adjust-
ing the pressure of the cold tires
(Y page2 59).The current pressures are
saved as new reference values. As aresult, a Tire pressure
257Wheelsand tires Z

warning message will appear if th
etirep res-
sure drop ssignificantly.
The tir epressure monito rdoes not warn you
of an incorrectly set tir epressure. Observe
th en otes on th erecommended tir epressure
(Y page 253).
The tir epressure monito risnot able to warn
you of asudden loss of pressure, e.g .ifthe
tir eisp enetrated by aforeign object .Inthe
even tofas udden loss of pressure, brin gthe
vehicle to ahalt by braking carefully. Avoid
abrupt steerin gmaneuvers.
The tir epressure monito rhas ay ellow warn-
ing lamp in th einstrumen tcluster for indicat-
ing apressure loss or malfunction .Whether
th ew arning lamp flashes or light supindi-
cates whether atirep ressure is to olow or the
tir ep ressure monito rismalfunctioning:
R if th ewarning lamp is lit continuously, the
tir ep ressure on one or mor etires is signif-
icantly to olow. The tir epressure monito ris
not malfunctioning.
R if th ewarning lamp flashes for aroun da
minute and then remains lit constantly, the tir ep ressure monito rismalfunctioning.
i In addition to th
ewarning lamp, ames-
sage appears in th emultifunction display.
Further informatio ncan be foun don
( Ypage 182).
If th etirep ressure monito rismalfunctioning,
it may tak emoret hant en minutes for th etire
pressure warning lamp to inform you of the
malfunction by flashing for approximately one
minute and then remainin glit. When th emal-
function has been rectified, th etirep ressure
warning lamp goes out after afew minutes of
driving.
The tir epressure values indicated by th eon-
board compute rmay differ fro mthose meas-
ured at agas statio nwithapressure gauge.
The tir epressures shown by th eon-board
compute rrefer to those measured at sea
level. At high altitudes, th etirep ressure val-
ues indicated by apressure gauge are higher than those shown by th
eon-board computer.
In this case ,donot reduc ethe tirep ressures.
The operatio nofthetirep ressure monito rcan
be affected by interference fro mradio trans-
mittin gequipment (e.g .radio headphones,
two-way radios )tha tm ay be bein goperated
in or near th evehicle.
Checkin gthe tirep ressur eelectroni-
cally X
Make sure that th eSmartKey is in position
2 in th eignitio nlock (Y page 119).
X Pres sthe 0059 or0065 button on th esteer-
ing wheel to selec tthe Serv. Serv. menu.
X Pres sthe 0063 or0064 button to select
Tir eP ressure
Tir eP ressure.
X Pres sthe 0076 button.
The curren ttirep ressure of each tir eis
shown in th emultifunction display.
If th evehicle has been parked for over
20 minutes ,the Tir ep ressure wil lbe
Tir ep ressure wil lbe
displayed after drivin gafew
displayed after drivin gafew
minutes
minutes message appears.
After ateach-in process, th etirep ressure
monito rautomatically detect snew wheels or
new sensors. As lon gasaclear allocation of
th et irep ressure value to th eindividual
wheels is not possible, the TireP ressure
Tir eP ressure
Monito rActive
Monito rActive display message is shown
instead of th etirep ressure display. The tire
pressures are already bein gmonitored.
i If an emergency spare wheel is mounted,
th es ystem may continue to show th etire
pressure of th ewheel that has been
removed for afew minutes .Ifthiso ccurs,
not ethatthe value displayed for th eposi-
tio nw here th espare wheel is mounted is
not th esame as th ecurren ttirep ressure of
th ee mergency spare wheel. 258
Tir
ep ressureWheels and tires

Tire pressure monito
rwarning mes-
sages If the tire pressure monitor detects
apressure
loss in one or mor etires, awarnin gm essage
is shown in the multifunctio ndisplay and the
yellow tire pressure monitor warnin glamp
come son.
R If the Correc tTireP ressure
Correc tTireP ressure message
appear sinthe multifunctio ndisplay ,the
tire pressure in at leas tone tire is too low
and must be correcte datthe next oppor-
tunity.
R If the Check Tir ePressure
Check Tir ePressure message
appear sinthe multifunctio ndisplay ,the
tire pressure in one or mor etire sh asdrop-
pe ds ignificantl yand the tire smustbe
checked.
R If the TirePressure Warnin gTire
Tir ePressure Warnin gTire
Malfunction
Malfunction message appear sinthe mul-
tifunctio ndisplay ,the tire pressure in one
or mor etire sh asdropped suddenl yand the
tire sm ustbec hecked.
Observe the instructions and safety note sin
the displa ymessage sinthe "Tires" section
(Y page 182).
i If the whee
lposit ions on the vehicl eare
rotated ,the tire pressures ma ybedis-
played for the wrong positions for ashort
time .Thisisr ectifie dafter afew minute sof
driving ,and the tire pressures ar edisplayed
for the correct positions.
Restartin gthe tire pressure monitor When yo
urestar tthe tire pressure monitor, all
existing warnin gmessage saredeleted and
the warnin glam ps go out. The monitor uses
the currentl yset tire pressures as the refer-
ence values for monitoring. In mos tcases, the
tire pressure monitor will automatically
detect the new reference values after you
have change dthe tire pressure. However, you
can also define reference values manuall yas
describe dhere. The tire pressure monitor
then monitors the new tire pressure values. X
Set the tire pressure to the valu erecom-
mended for the corresponding driving sit-
uatio nont he Tire and Loading Information
placard on the driver's side
B-pillar (Y page 253).
Additiona ltire pressure values for different
load scan also be found on the tire pressure
table on the insid eofthe fuel fille rflap
(Y page 253).
X Make sure tha tthe tire pressure is correct
on al lfou rw heels.
X Make sure tha tthe SmartKe yisinposition
2 in the ignition lock.
X Press the 0059or0065 button on the steer-
ing whee ltoselect theServ.
Serv. menu.
X Press the 0063or0064 button to select
Tir ePressure
Tir ePressure.
X Press the 0076button.
The multifunctio ndisplay shows the cur-
rent tire pressure for the individual tire sor
the Tire Tire pressure
pressure will
willbe
bedisplayed
displayed
after drivin gafew minutes
after drivin gafew minutes mes-
sage.
X Press the 0064button.
The Use Curren tPressures as New
Use Curren tPressures as New
Reference Values
Reference Values message appearsin
the multifunctio ndisplay.
If yo uwishtoc onfirm the restart:
X Press the 0076button.
The TirePress. Monito rRestarted
Tir ePress. Monito rRestarted
message appear sinthe multifunctio ndis-
play.
After driving for afew minutes, the system
checks whether the current tire pressures
ar ew ithi nt he specifie drange.The new tire
pressures ar ethena ccepted as reference
values and monitored.
If yo uwishtoc ancel the restart:
X Press the 0038button.
The tire pressure values stored at the last
restar twillc ontinue to be monitored. Tire pressure
259Wheelsand tires Z

Loading th
evehicle Instruction labels for tires and loads
G
WARNING
Overloade dtires can overheat ,causing a
blowout .Overloade dtires can also impair the
steerin gand driving characteristic sand lead
to brak efailure. Ther eisarisk of accident.
Observe th eload rating of th etires. The load
rating must be at least half of th eGAWR of
your vehicle .Never overload th etires by
exceedin gthe maximum load.
Two instruction labels on your vehicle show
th em aximum possible load.
(1) The Tire and Loadin gInformation placard
is on th eB-pillar on th edriver' sside. The
Tire and Loadin gInformation placard
shows th emaximum permissibl enumber
of occupant sand th emaximum permis-
sible vehicle load. It also contain sdetails
of th etires izes and corresponding pres-
sures for tires mounte datthefactory.
(2) The vehicle identification plat eisonthe
B-pillar on th edriver' sside. The vehicle
identification plat einform syou of the
gross vehicle weight rating .Itismade up
of th evehicle weight ,all vehicle occu-
pants, th efuel and th ecargo. You can
also fin dinformatio nabout th emaximum
gross axle weight rating on th efront and
rear axle.
The maximum gross axle weight rating is th em aximum weight that can be carried
by on eaxle (fron torrear axle) .Never
exceed th emaximum load or th emaxi-
mum gross axle weight rating for the
fron torr ear axle. 0043
B-pillar ,driver' sside Maximum permissible gros
svehicle
weight rating X
Specification for maximum gross vehicle
weight 0043is listed in th eTire and Loading
Information placard: "The combine dweight
of occupant sand cargo should never
exceed XXX kilogram sorXXX lbs."
The gross weight of all vehicle occupants,
cargo, luggage and trailer load/noseweight (if
applicable) must no texceed th especified
value.
i The specifications shown on th
eTire and
Loadin gInformation placar dintheillustra-
tio na re examples. The maximum permis-
sible gross vehicle weight rating is vehicle-
specific and may differ from that in the
illustration .You can fin dthe valid maximum
permissibl egross vehicle weight rating for
your vehicle on th eTire and Loadin gInfor-
mation placard. 260
Loading th
evehicleWheels and tires

Gross axle weight rating:
the maximumper-
missible weight that can be carried by one
axle (front or rear axle).
To ensure that yourv ehicle does not exceed
the maximu mpermissibl evalues (gross vehi-
cle weight and maximu mgross axle weight
rating), have yourl oaded vehicle (including
driver, occupants, cargo, and full traile rloa dif
applicable) weighed on asuitable vehicle
weighbridge. All about wheels and tires
Uniform Tire Quality Grading Stand-
ards
Overvie wofTire Quality Grading Stand-
ards Uniform Tire Quality Grading Standards are
U.S. government specifications. Theirp ur-
pose is to provid edrivers with uniform relia-
ble information on tire performance data. tire manufacturers have to grade tires using three
performance factors: tread wear 0043,tire trac-
tion 0044and heat resistance 0087.All tires sold
in North America are provided with the cor-
responding quality class mark on the sidewall
of the tire, even though these regulations do
not apply to Canada.
Quality grade scan be found, where applica-
ble, on the tire sidewallb etweenthe tread
shoulder and maximu mtire width. Example:
R Treadwear grade: 200
R Traction grade: AA
R Temperatur egrade: A
All passenger car tires must conform to the
statutory safety requirements in addition to
these grades.
i The actual values for tires are vehicle-
specifi cand may deviate from the values in
the illustration.
Treadwear The treadwear grade is
acomparative rating
basedont he wearrate of the tire when tested
under controlled conditions on aspecified
U.S. government course. For example, atire
grade d150 would wearo ne and one-half
times as wellont he government course as a
tire grade d100.
The relative performance of tires depends
upont he actual conditions of their use, how-
ever, and may depart significantly from the
norm due to variations in driving habits,
service practices and differences in road
characteristics and climate conditions.
Traction G
WARNING
The traction grade assigned to this tire is
basedons traight-ahead braking traction
tests, and does not includ eacceleration, cor-
nering, hydroplaning, or peakt raction char-
acteristics.
! Avoid wheelspin. This can leadtod
amage
to the drive train.
The traction grade s–from highest to lowest –
are AA, A, Band C. Those grade srepresent
the tire's ability to stop on wet pavement as
measured under controlled conditions on
specified government test surfaces of asphalt
and concrete. Atire marked Cmay have poor
traction performance. Alla
bout wheels and tires
263Wheelsand tires Z

The safe speed on
awet, snow covered or icy
road is alway slower than on dry road surfa-
ces.
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Mercedes-Benz recommends aminimum
tread depth of 00CFin (4 mm )onall four winter
tires. Observe the legally required minimum
tire tread depth (Y page 251). Winter tires can
reduce the braking distanc eonsnow-covered
surfaces in comparison with summer tires.
The braking distanc eisstill much further than
on surfaces that are not icy or covered with
snow. Take appropriate care when driving.
Further information on winter tires (M+S
tires) (Y page 252).
Temperature G
WARNING
The temperature grade for this tire is estab-
lished for atire that is properly inflated and
not overloaded. Excessive speed, underinfla-
tion, or excessiv eloading, either separately or
in combination, can cause excessiv eheat
build-up and possible tire failure.
The temperature grades are A(the highest), B,
and C. They represent the tire's resistanc eto
the generation of heat and its ability to dissi- pate heat when tested under controlled con-
ditions on aspecified indoor laboratory test
wheel. Sustained high temperature can cause
the material of the tire to degenerate and
reduce tire life, and excessiv etemperature
can lead to sudden tire failure. The grade C
corresponds to alevel of performance which
all passenger car tires must meet under the
Federal Motor Vehicle Safety Standard No.
109. Grades BandArepresent higher levels
of performance on the laboratory test wheel
than the minimum required by law. Tire labeling
Overview The following markings are on the tire in addi-
tion to the tire name (sales designation) and
the manufacturer's name: 0043
Uniform Tire Quality Grading Standard
(Ypage 268)
0044 DOT, Tire Identification Number
(Ypage 267)
0087 Maximum tire load (Y page 267)
0085 Maximum tire pressure (Y page 256)
0083 Manufacturer
0084 Tire material (Y page 268)
006B Tire size designation, load-bearing capa-
city and speed rating (Y page 264)
006C Load index (Y page 266)
006D Tire name
i Tire data is vehicle-specific and may devi-
ate from the data in the example.
Tire size designation, load-bearing
capacity and speed rating G
WARNING
Exceeding the stated tire load-bearing capa-
city and the approved maximum speed could
lead to tire damage or the tire bursting. There is ar isk of accident. 264
All about wheelsa
nd tiresWheels and tires