2015 MERCEDES-BENZ SLS AMG GT COUPE tire pressure

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

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

Therefore, only use tire types and sizes
approved for your vehicle model. Observe the
tire load rating and speed rating required for
your vehicle. 0043
Tire width
0044 Nominal aspect ratio in %
0087 Tire code
0085 Rim diameter
0083 Load bearing index
0084 Speed rating
i Tire data is vehicle-specific and may devi-
ate from the data in the example.
General: depending on the manufacturer's
standards, the size imprinted in the tire wall
may not contain any letter sormay contain
one letter that precedes the size description.
If there is no letter preceding the size descrip-
tion (as shown above): these are passenger
vehicle tires accordin gtoEuropean manufac-
turing standards.
If "P" precedes the size description :these are
passenger vehicle tires accordin gtoU.S.
manufacturing standards.
If "LT" precedes the size description :these
are light truck tires accordin gtoU.S. manu-
facturin gstandards.
If "T" precedes the size description :these are
compact emergenc yspare wheels at high tire
pressure, to be used only temporarily in an
emergency.
Tire width: tire width0043shows the nominal
tire width in millimeters. Aspect ratio:
aspect ratio0044is the size ratio
between the tire height and tire width and is
shown in percent .The aspect ratio is calcu-
lated by dividing the tire width by the tire
height.
Tire code: tire code0087specifies the tire type.
"R" represent sradial tires; "D" represents
diagonal tires; "B" represent sdiagonal radial
tires.
Optionally, tires with amaximum speed of
over 149 mph (240 km/h) may have "ZR" in
the size description depending on the manu-
facturer (e.g. 245/40 ZR 18).
Rim diameter: rim diameter0085is the diam-
eter of the bead seat, not the diameter of the rim flange. The rim diameter is specified in
inches (in).
Load-bearing index: load-bearing index0083
is an umerical code that specifies the maxi-
mum load-bearing capacity of atire.
Do not overload the tires by exceeding the
specified load limit. The maximum permissi-
ble load can be found on the vehicle's Tire and
Loading Information placard on the B-pillar on the driver's side (Y page 260).
Example:
Load-bearing index 91 indicates amaximum
load of 1,356 lb (615 kg) that the tires can
bear. For further information on the maximum tire load in kilograms and lbs, see
(Y page 267).
For further information on the load bearing
index, see "Load index" (Y page 266).
Speed rating: speed rating0084specifies the
approved maximum speed of the tire.
Regardless of the speed rating, always
observe the speed limits. Drive carefully and
adapt your driving style to the traffic condi-
tions. Summer tires
Index Speed rating
Q up to 100 mph (160 km/h)
R up to 106 mph (170 km/h)All about wheelsa
nd tires
265Wheels and tires Z

i
Tire data is vehicle-specific and may devi-
ate from the data in the example.
In addition to the load-bearing index, load
index 0043may be imprinted after the letters
that identify speed rating 0084(Ypage 264) on
the sidewall of the tire.
R If no specification is given: no text (as in the
example above), represent sastandard
load (SL) tire
R XL or Extra Load: represent sareinforced
tire
R Light Load: represent salight load tire
R C, D, E: represent saload range that
depends on the maximum load that the tire can carry at acertain pressure
Maximum load rating Maximum tire load
0043is the maximum per-
missible weight for which the tire is approved.
Do not overload the tires by exceedin gthe
specified load limit. The maximum permissi-
ble load can be found on the vehicle's Tire and Loading Information placard on the B-pillar onthe driver's side (Y page 260).
i The actual values for tires are vehicle-
specific and may deviate from the values in
the illustration.
DOT, Tire Identification Number (TIN) U.S.t
ire regulations stipulate that every tire
manufacturer or retreader must imprint aTIN
in or on the sidewall of each tire produced. The TIN is
aunique identification number. The
TIN enables tire manufacturers to inform pur-
chasers of recalls and other safety-relevant
matters. It makes it possible for the pur-
chaser to easily identify the affected tires.
The TIN is made up of manufacturer identifi-
cation code 0044,tire size 0087,tire type code 0085
and manufacturing date 0083.
i Tire data is vehicle-specific and may devi-
ate from the data in the example.
DOT (Department of Transportation): tire
symbol 0043marks that the tire complies with
the requirement softhe U.S.D epartment of
Transportation.
Manufacturer identification code: manu-
facturer identification code 0044provides
details on the tire manufacturer. New tires
have acode with two symbols.
Tire size: identifier0087describes the tire size.
Tire typec ode:tire type code 0085can be used
by the manufacturer as acode to describe
specific characteristics of the tire.
Date of manufacture: date of manufacture
0083 provides information about the age of a
tire. The first and second positions represent the week of manufacture, starting with "01"
for the first calendar week. Positions three
and four represent the year of manufacture.
For example, atire that is marked with "3208"
was manufactured in week 32 in 2008. All about wheelsa
nd tires
267Wheels and tires Z

Tire characteristics
i
Tire data is vehicle-specific and ma
ydevi-
ate fro mthe data in the example.
Thi sinformatio ndescribe sthe tire cord and
the numbe roflayer sins idewall 0043and under
tire tread 0044.
Definition of terms fo rtire sa nd loading Tire ply composition and material used
Describes the numbe rofpliesor the number
of layers of rubber-coate dfabricint he tire
trea dand sidewall .These ar emadeofs teel,
nylon, polyeste rand othe rmaterials.
Bar
Metric uni tfor tire pressure. There are
14.503 8pound sp ersquare inch (psi )to
1b ar;ther eare100 kilopascal s(kPa) to 1bar.
DO T(De partmen tofTransportation)
DOT-marked tire sfulfill the requirements of
the USD epartment of Transportation.
Normal occupant weight
The numbe rofoccupants the vehicl eis
designe dtoseat, multiplied b y68k ilograms
(15 0lbs).
Uniform Tire Quality Grading Standards
Au nifor mstandard to grade the quality of
tire swithr egards to trea dquali ty,tire traction
and temperatur echaracteristics. The quality
grading assessment is made by the manufac-
turer following specifications fro mthe U.S. government. The rating
saremolde dinto the
sidewall of the tire.
Recommende dtire pressures
The recommende dtire pressure for your vehi-
cle under normal driving conditions. Yo uwill
find the recommendatio nonthe Tire and
Loading Informatio nplacard on the B-pillar on
the driver's side of your vehicle. The recom-
mended tire pressure provides the best bal-
ance between handling characteristics, ride
comfort and wear .Supplemental information
pertaining to special driving situations can be
found on the tire inflation pressure labe lon
the insid eofthe fuel fille rflap.
Increase dvehicle weight due to optional
equipment
The combine dweigh tofa llstandard and
optional equipment availabl efor the vehicle,
regardles sofwhether it is actually installed
on the vehicl eornot.
Rim
Thi sist he part of the whee lonwhich the tire
is mounted.
GAWR (Gros sAxleW eight Rating)
The GAW Risthe maximum permissibl eaxle
weight. The actual load on an axl emustn ever
exceed the gross axl eweigh trating .The
gross axl eweigh trating can be found on the
vehicl eide ntification plate on the B-pillar on
the driver's side.
Speed rating
The spee drating is part of the tire identifica-
tion. It specifie sthe spee drange for which the
tire is approved.
GVW (Gros sVehicle Weight)
The gross vehicl eweigh tincludes the weight
of the vehicl eincluding fuel ,tools, the spare
wheel, accessorie sinstalled, occupants, lug-
gage and the drawbar noseweight, if applica-
ble. The gross vehicl eweigh tmustn ot exceed
the gross vehicl eweigh trating (GVWR )as
specifie donthe vehicl eide ntification plate on
the B-pillar on the driver's side. 268
Al
la bout wheels an dtiresWheel sand tires

GVWR (Gross Vehicl
eWeight Rating)
The GVWR is the maximu mpermitted gross
weight of the fullyl oaded vehicle (weight of
the vehicle including all accessories, occu-
pants, fuel,l uggage and the drawbar nose-
weight if applicable).T he gross vehicle weight
rating is specified on the vehicle identification plate on the B-pilla ronthe driver's side.
Maximum loaded vehicle weight
The maximu mweight is the sum of the curb
weight of the vehicle ,the weight of the acces-
sories ,the total loadl imitand the weight of
the optional equipment installed at the fac-
tory.
Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa is the
equivalent of 1psi.A nother unit for tire pres-
sure is bar. There are 100 kilopascals (kPa) to
1b ar.
Load index
In addition to the load-bearing index, the load index may alsobei mprinted on the sidewallof
the tire. This specifies the load-bearing capa-
city more precisely.
Curb weight
The weight of avehicle with standard equip-
ment including the maximu mcapacity of fuel,
oil and coolant. It alsoi ncludes the air-condi-
tioning system and optional equipment if
these are installed in the vehicle ,but does not
includ epassengers or luggage.
Maximum load rating
The maximu mloadr ating in kilograms or
pounds is the maximu mweight for which a
tire is approved.
Maximum permissible tire pressure
Maximu mpermissibl etire pressure for one
tire.
Maximum load on one tire
Maximu mloadono ne tire. This is calculated
by dividing the maximu maxle loadofo ne axle
by two. PSI (pounds per square inch)
As
tandard unit of measure for tire pressure.
Aspec tratio
Relationshi pbetwee ntire heigh tand tire
width in percent.
tire pressure
This is pressure inside the tire applying an
outward force to each square inch of the tire's surface. The tire pressure is specified in
pounds per square inch (psi), in kilopascal
(kPa) or in bar. The tire pressure shoul donly
be corrected when the tires are cold. For this,
the vehicle must have been stationary for at
least three hours or not have traveled more
than 1.6 km (1 mile)int his time.
Tire pressure of coldt ires
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 more than
1m ile (1.6 km)
Tread
The part of the tire that comes into contact
with the road.
Bead
The tire beade nsures that the tire sits
securel yonthe wheel. There are severa lsteel
wiresint he beadtop revent the tire from
coming loose from the wheelr im.
Sidewall
The part of the tire betwee nthe tread and the
bead.
Weight of optional extras
The combined weight of those optional extras
that weigh more than the replaced standard
part and more than 2.3 kilograms (5 lbs).
These optional extras, such as high-perform-
ance brakes, level control, aroof rack or a
high-performance battery, are not included in Alla
bout wheels and tires
269Wheelsand tires Z

the curb weight and the weight of the acces-
sories.
TIN (Tire Identificatio nNumber)
This is auniqu eide ntifier which can be used
by atirem anufacturer to identify tires ,for
exampl efor ap roduct recall, and thu side ntify
the purchasers. Th eTIN is made up of the
manufacturer's identity code, tir esize, tire
typ ecodea nd the manufacturing date.
Load bearin gind ex
Th eloa db eari ng index (als oloa dindex) is a
cod etha tcontains the maximum load bearing
capacity of atire.
Traction
Tractio nist he resul toffrictio nbetween the
tires and the roa dsurface.
Treadwea rind icators
This is indicated by narrow bars (treadwear
bars) tha tare distributed ove rthe tir etread. If
the tir etrea disl evel with the bars, the wear
limi tof 1
/ 16 in (1.
6mm) ha sbeenr eached.
Occupant distribution
Th ed istributio nofoccupants in avehicl eat
their designated seating positions.
Tota lloa dl im it
Rated cargo and luggag eloa dp lus68k ilo-
grams (15 0lb) times the vehicle' sdesig nated
seating capacity. Changin
gawheel Flat tire
Th e" Breakdown assistance" section
(Y page 235 )contains information and notes
on ho wtod ealw ithaf latt ire. Rotatin
gthe wheels G
WARNING
Interchanging the front and rea rwheel smay
severel yimpair the driving characteristics if
the wheels or tires have different dimensions. Th ew heel brakes or suspensio ncomponents
ma yalsobed amaged .The re is ariskofa cci-
dent.
Rotate front and rea rwheel sonlyift he wheels
and tires ar eofthe same dimensions.
! On vehicles equipped with
atirep ressure
monitor, electroni ccomponents are
locate dinthe wheel.
Tire-mounting tools shoul dnot be used
nea rthe valve. This could damage the elec-
troni ccomponents.
Onl yhavet ires change dataqualified spe-
cialist workshop.
Alway spayattentio ntothe instructions and
safety note swhenc hanging awheel
( Y page 271).
Th ew earp atterns on the front and rea rtires
differ, depending on the operating conditions.
Rotate the wheels befor eaclear wear pattern
ha sformed on the tires .Front tires typically
wear mor eonthe shoulders and the rea rtires
in the center.
If your vehicle' stirec onfiguration allows ,you
can change the wheels according to the inter-
vals in the tir emanufacturer's warranty book
in your vehicl edocum ents.Ifnow arranty
book is available, the tires shoul dberotated
every 3,000 to 6,000 mile s(5,000 to
10,000 km), or earlie riftirew earrequires .Do
not change the directio nofwheelrotation.
Clea nthe contact surfaces of the whee land
the brake disc thoroughly every tim eawheel
is rotated .Check the tir epressure and reac-
tivate the tir epressure monitor if necessary. Directio
nofrotation
Tires with aspecified directio nofrotation
have additional benefits, e.g .ifthere is arisk 270
Changin
gawheelWheels an dtires