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

Useful information
i This Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please not ethat your vehicle may not be
equipped with all feature sdescribed. This
also applies to safety-related system sand
functions.
i Please read the information on qualified
specialist workshops (Y page 23).Important safet
ynotes G
WARNING
If wheels and tires of the wrong size are used, the wheel brakes or suspensio ncomponents
may be damaged. There is arisk of an acci-
dent.
Always replace wheels and tires with those
that fulfill the specification softhe original
part.
When replacin gwheels, make sure to use the
correct:
R designation
R model
When replacin gtires ,make sure to use the
correct:
R designation
R manufacturer
R model G
Warning
Af lat tire severely impairs the driving, steer-
ing and brakin gcharacteristic softhe vehicle.
There is arisk of an accident.
do not drive with aflat tire. Immediately
replace the flat tire with your spare wheel, or
consult aqualified specialist workshop.
Accessories that are not approved for your
vehicle by Mercedes-Benz or that are not being used correctly can impair the operating
safety.
Before purchasin gand using non-approved
accessories, visit aqualified specialist work-
shop and inquire about:
R suitability
R legal stipulations
R factory recommendations
Information on dimensions and types of
wheels and tires for your vehicle can be found (Y page 275).
Information on air pressure for the tires on
your vehicle can be found:
R on the vehicle' sTire and Loading Informa-
tion placard on the B-pillar
R on the tire pressure label on the fuel filler
flap
R under "Tire pressure"
i Further information on wheels and tires
can be obtained at any qualified specialist
workshop. Operation
Information on driving
R If the vehicle is heavily loaded, chec kthe
tire pressures and correct them if neces-
sary.
R While driving, pay attention to vibrations,
noises and unusual handling characteris-
tics, e.g. pulling to one side. This may indi- cate that the wheels or tires are damaged.If you suspect that atire is defective,
reduce your speed immediately. Stop the
vehicle as soon as possible to chec kthe
wheels and tires for damage. Hidden tire
damage could also be causing the unusual
handling characteristics. If you find no
signs of damage, have the wheels and tires checked at aqualified specialist workshop.
R When parkin gyour vehicle, make sure that
the tires do not get deformed by the curb or
other obstacles. If it is necessary to drive
over curbs, speed humps or similar eleva- 250
OperationWheels and tires

Snow chains
G
WARNING
If snow chains are installed to the front
wheels, they may drag against the vehicle
body or chassis components. This could
cause damage to the vehicle or the tires.
There is arisk of an accident.
To avoid hazardous situations:
R never install snow chains to the front
wheels
R always install snow chains in pairs to the
rear wheels.
! On some tire sizes there is not enough
space for snow chains. To avoid damage to
the vehicle or tires, observe the "Wheel and tire combinations" section under "Tires and
wheels".
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains that
have been specially approved for your vehicle by Mercedes-Benz, or are of acorresponding
standard of quality.
R You may not attach snow chains to all
wheel-tire combination ,see the informa-
tion under "Wheels and tires" in the "Tech-
nical data" section.
R Only use snow chains when driving on
roads completely covered by snow.
Remove the snow chains as soon as possi- ble when you come to aroad that is not
snow-covered.
R Local regulations may restrictt he use of
snow chains. Observe the appropriate reg- ulations if you wish to mount snow chains.
R Do not exceed the maximum permissible
speed of 30 mph (50 km/h).
i You can deactivate ESP ®
(Y page 55)
when pulling away with snow chains instal-
led. You can thereby allow the wheels to
spin in acontrolled manner, achieving an
increased driving force (cuttinga ction). Tire pressure
Tire pressures
pecifications
Important safety notes G
WARNING
Underinflated or overinflated tires pose the
following risks:
R the tires may burst, especially as the load
and vehicle speed increase.
R the tires may wear excessively and/or
unevenly, which may greatly impair tire
traction.
R the driving characteristics, as well as steer-
ing and braking, may be greatly impaired.
There is arisk of an accident.
Follow recommended tire inflation pressures
and check the pressure of all the tires includ-
ing the spare wheel:
R monthly, at least
R if the load changes
R before beginning along journey
R under different operating conditions, e.g.
off-road driving
If necessary, correct the tire pressure.
i The specifications on the sample Tire and
Loading Information placard and tire pres-
sure tables are examples. Tire pressure
specifications are vehicle-specific and may
deviate from the data shown here. The tire pressure specifications that are valid for
your vehicle can be found on the Tire and
Loading Information placard and tire pres-
sure table on the vehicle.
General notes The recommended tire pressures for the tires
mounted at the factory can be found on the
labels described here.
Further information on tire pressures can be
obtained at aqualified specialist workshop. Tire pressure
253Wheels and tires Z

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

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

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