MERCEDES-BENZ SLS AMG GT ROADSTER 2015 C197 Owner's Manual

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

Numbe
rofseats Maximum numbe
rofseats 0043 indicates the
maximum numbe rofoccupants allowe dto
travel in the vehicle. This information can be
found on the Tire and Loading Information
placard.
i Th
es pecifications shown on the Tire and
Loading Informatio nplacard in the illustra-
tio na reexamples .The numbe rofseats is
vehicle-specific and can diffe rfromt he
details shown. Th enumbe rofseats in your
vehicl ecan be found on the Tire and Load-
ing Informatio nplacard. Determining the correc
tloa dl im it
Step-by-ste pinstructions Th
ef ollowing steps have been developed as
required of al lmanufacturer sunder Title 49,
Code of U.S. Federa lRegulat ions, Part 575
pursuant to the "Nationa lTraffi cand Motor
Vehicle Safety Act of 1966".
X Ste p1: Locate the statement "The com-
bined weight of occupants and cargo
shoul dneve rexceed XXX kg or XXX lbs." on
your vehicle' sTirea nd Loading Information
placard.
X Ste p2: Determine the combined weight of
the driver and passengers tha twillber iding
in your vehicle.
X Ste p3:Subtract the combined weight of
the driver and passengers fro mXXX kilo-
grams or XXX lbs. X
Ste p4:Th eresulting figure equals the
availabl eamount of cargo and luggag eload
capacity. For example, if the "XXX" amount
equals 1400 lb sand there will be five 150
lb sp assengers in your vehicle, the amount
of availabl ecargo and luggag eloa dc apa-
city is 650 lb s(1400-750 (5 x150) =650
lbs).
X Ste p5:Determine the combined weight of
luggag eand cargo being loaded on the
vehicle. That weight ma ynot safel yexceed
the availabl ecargo and luggag eloa dc apa-
city calculated in ste p4. Loading the vehicle
261Wheelsand tires Z

Example: steps
1to3The followin
gtable show sexamples on how to calculate total and cargo load capacities with
varying seating configurations and number and siz eofoccupants. The followin gexamples use
al oad limit of 1500lbs (68 0kg). This is for illustration purposes only. Makesure you are
usin gthe actual load limit for your vehicle state donyour vehicle's Tire and Loading Information
placar d(Ypage 261).
The greate rthe combined weight of th eoccupants, th elower th emaximum luggage load.
Step 1 Example 1 Example 2
Combined maximum weight of
occupant
sand cargo (data from
th eT irea nd Loading Information
placard) 1500 lbs (68
0kg) 1500 lbs (68
0kg) Step 2
Example 1 Example 2
Number of people in th
evehicle
(driver and occupants) 1 2
Weigh
toftheoccupants Occupan
t1:175lbs
(80 kg) Occupan
t1:175lbs
(80 kg)
Occupan t2:195lbs
(88 kg) Gross weight of all occupants
17
5lbs (80 kg) 37
0lbs (16 8kg) Step 3
Example 1 Example 2
Permissible load (maximum
gross vehicle weight ratin
gfrom
th eT irea nd Loading Information
placar dminus th egross weight
of all occupants) 1500 lbs (68
0kg)
00F817 5lbs (80 kg) =
1325 lbs (60 0kg) 1500 lbs (68
0kg)
00F837 0lbs (16 8kg) =
1130 lbs (51 2kg) Vehicle identification plate
Even if you have calculate dthe total cargo
carefully, you shoul dstill mak esure that the
gross vehicle weight rating and th egross axle
weight rating are no texceeded .Detail sc an
be foun donthevehicle identification plat eonth
eB -pillar on th edriver' sside of th evehicle
(Y page 260).
Gross vehicle weight: theg ross weight of
th ev ehicle ,all passengers ,cargo and trailer
load/noseweight (if applicable) must not
exceed th epermissible gross vehicle weight. 262
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

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

Summer tires
Index Speed rating
S up to 112 mph (180 km/h)
T up to 118 mph (190 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
W up to 168 mph (270 km/h)
Y up to 186 mph (300 km/h)
ZR...Y up to 186 mph (300 km/h)
ZR...(..Y) over 186 mph(300 km/h)
ZR over 149 mph (240 km/h)
R
Optionally, tires with amaximum speed of
over 149 mph (240 km/h) may have "ZR"in the size description depending on the man-
ufacturer (e.g. 245/40 ZR 18).
The service specification is made up of
load-bearing index 0083and speed rating 0084.
R If the size description of your tire includes
"ZR"a nd there are no service specifica-
tions, ask the tire manufacturer in order to find out the maximum speed.
If as ervice specification is available, the
maximum speed is limited according to the
speed rating in the service specification.
Example: 245/40 ZR 18 97 Y.In this exam-
ple, "97 Y" is the service specification. The
letter "Y" represents the speed index and
the maximum speed of the tire is limited to
186 mph (300 km/h).
R The size descriptio nfor all tires with maxi-
mum speedsofo ver 186 mph (300 km/h)
must include "ZR" andthe service specifi-
cation must be given in brackets. Example:
275/40 ZR 18 (99 Y) .The speed index "(Y)"
indicates that the maximum speed of the
tire is over 186 mph (300 km/h). Ask the
tire manufacturer aboutt he maximum
speed. All-weather tires and winter tires
Index Speed rating
QM
+S5 up to 100 mph (160 km/h)
TM
+S5 up to 118 mph (190 km/h)
HM
+S5 up to 130 mph (210 km/h)
VM
+S5 Up to 149 mph (240 km/h)
i
Not all tires with the M+S marking provide
the driving characteristics of winter tires. In
addition to the M+S marking, winter tires
also have the 004Dsnowflake symbolon
the tire wall. Tires with this marking fulfill
the requirements of the Rubber Manufac-
turers Association (RMA) and the Rubber
Association of Canada (RAC)r egarding
snow traction, and were specially devel-
oped for driving on snow.
The speed rating of tires mounted at the fac-
tory may be highert han the maximum speed
that the electronic speed limiter permits.
Make sure that yourt ires have the required
speed rating for yourv ehicle as specified in
the "Tires" section (Y page 275), e.g. if you
buy new tires.
Further information aboutr eading tire data
can be obtained from any qualified specialist
workshop.
Load index 5
Or M+S004D for winter tires.266
Alla
bout wheels and tiresWheelsa nd tires

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