tire size MERCEDES-BENZ SL-CLASS ROADSTER 2013 Owners Manual

TIREFIT kit ..........................................
510
Tire pressure Calling up (on-board computer)
.....534
Checking manually ........................533
Display message ............................ 247
Maximum ....................................... 532
Notes ............................................. 531
Not reached (TIREFIT) .................... 512
Reached (TIREFIT) .......................... 512
Recommended ............................... 529
Tire pressure loss warning system
Important safety notes .................. 533
Restarting ...................................... 533
Tire pressure monitoring system
Function/notes ............................. 534
Restarting ...................................... 536
Warning lamp ................................. 266
Tires
Aspect ratio (definition) ................. 547
Average weight of the vehicle
occupants (definition) .................... 545
Bar (definition) ............................... 545
Changing a wheel .......................... 547
Characteristics .............................. 545
Checking ........................................ 527
Definition of terms ......................... 545
Direction of rotation ......................548
Display message ............................ 247
Distribution of the vehicle
occupants (definition) .................... 547
DOT, Tire Identification Number
(TIN) ............................................... 544
DOT (Department of
Transportation) (definition) ............ 545
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 546
GVW (Gross Vehicle Weight)
(definition) ..................................... 546
GVWR (Gross Vehicle Weight
Rating) (definition) .........................546
Important safety notes .................. 526
Increased vehicle weight due to
optional equipment (definition) ...... 546
Kilopascal (kPa) (definition) ........... 546
Labeling (overview) ........................ 541
Load bearing index (definition) ...... 547
Load index ..................................... 544
Load index (definition) ...................546Maximum loaded vehicle weight
(definition) .....................................
546
Maximum load on a tire
(definition) ..................................... 546
Maximum permissible tire
pressure (definition) ....................... 546
Maximum tire load
.........................544
Maximum tire load (definition) .......546
MOExtended tires .......................... 528
Optional equipment weight
(definition) ..................................... 547
Overview ........................................ 526
PSI (pounds per square inch)
(definition) ..................................... 546
Replacing ....................................... 547
Service life ..................................... 528
Sidewall (definition) .......................547
Speed rating (definition) ................ 546
Storing ........................................... 548
Structure and characteristics
(definition) ..................................... 545
Temperature .................................. 541
TIN (Tire Identification Number)
(definition) ..................................... 547
Tire bead (definition) ......................547
Tire pressure (definition) ................ 547
Tire pressures (recommended) ...... 545
Tire size (data) ............................... 552
Tire size designation, load-bearing
capacity, speed rating .................... 541
Tire tread ....................................... 527
Tire tread (definition) .....................547
Total load limit (definition) ............. 547
Traction ......................................... 540
Traction (definition) ....................... 547
Tread wear ..................................... 540
Uniform Tire Quality Grading
Standards ...................................... 540
Uniform Tire Quality Grading
Standards (definition) .................... 545
Unladen weight (definition) ............ 546
Wear indicator (definition) .............547
Wheel rim (definition) .................... 546
see Flat tire
Towing
Important safety guidelines ...........518
Installing the towing eye ................ 51824
Index

Selecting the location
....................394
Selecting the location in the
weather map .................................. 395
Switching off .................................. 393
Switching on .................................. 393
Weather map (COMAND)
Legend
........................................... 396
Showing/hiding the menu ............. 396
Switching to the weather
information display ........................ 396
Weather map (SIRIUS)
Calling up ....................................... 465
Legend ........................................... 470
Moving ........................................... 465
Showing/hiding layers ...................466
Showing/hiding the menu ............. 465
Time stamp .................................... 470
Weather memory (SIRIUS)
Selecting an area ........................... 465
Storing an area .............................. 464
Website
Add to favourites ........................... 407
Wheel bolt tightening torque ...........552
Wheel chock ...................................... 549
Wheels Changing a wheel .......................... 547
Checking ........................................ 527
Cleaning ......................................... 502
Cleaning (warning) .........................548
Important safety notes .................. 526
Interchanging/changing ................547
Mounting a new wheel ................... 551
Mounting a wheel .......................... 548
Overview ........................................ 526
Removing a wheel ..........................551
Storing ........................................... 548
Tightening torque ........................... 552
Wheel size/tire size ....................... 552
Windows
see Side windows
Wind screen
Electrical wind screen ...................... 92
Manual wind screen ......................... 90
Windshield
Defrosting ...................................... 128
Windshield washer fluid
see Windshield washer system Windshield washer system
Adding washer fluid ....................... 499
Notes
............................................. 564
Windshield wipers
Problem (malfunction) ...................120
Replacing the wiper blades ............ 119
Switching on/off ........................... 118
Winter driving
Important safety notes .................. 528
Slippery road surfaces ................... 161
Snow chains .................................. 529
Winter operation
Overview ........................................ 528
Winter tires
M+S tires ....................................... 528
Wiper blades
Cleaning ......................................... 503
Important safety notes .................. 119
Replacing ....................................... 119
Wooden trim (cleaning
instructions) ...................................... 505
Workshop see Qualified specialist workshop Z
ZAGAT ®
rating service ...................... 315 Index
27

If ESP
®
detects that the vehicle is deviating
from the direction desired by the driver, one
or more wheels are braked to stabilize the
vehicle. The
engine output is also modified to
keep the vehicle on the desired course within
physical limits. ESP ®
assists the driver when
pulling away on wet or slippery roads. ESP ®
can also stabilize the vehicle during braking.
If ESP ®
intervenes, the ÷ ESP®
warning
lamp flashes in the instrument cluster.
If ESP ®
intervenes:
X Do not deactivate ESP ®
under any
circumstances.
X only depress the accelerator pedal as far as
necessary when pulling away.
X adapt your driving style to suit the
prevailing road and weather conditions.
i Only use wheels with the recommended
tire sizes. Only then will ESP ®
function
properly.
ETS (Electronic Traction System) Traction control is part of ESP
®
.
Traction control brakes the drive wheels
individually if they spin. This enables you to
pull away

and accelerate on slippery surfaces,
for example if the road surface is slippery on
one side.
Traction control remains active if you
deactivate ESP ®
.
Deactivating/activating ESP ®
(except
AMG vehicles) G
WARNING
If you deactivate ESP ®
, ESP ®
no longer
stabilizes the vehicle. There is an increased
risk of skidding and an accident.
Only deactivate ESP ®
in the situations
described in the following.
! Avoid spinning the driven wheels for an
extended period with ESP ®
deactivated.
You could

otherwise damage the drivetrain. X
To deactivate: press button :.
The å ESP ®
OFF warning lamp in the
instrument cluster lights up.
X To activate: press button :.
The å ESP ®
OFF warning lamp in the
instrument cluster goes out.
ESP ®
is activated automatically when the
engine is started.
The ECO start/stop function switches the
engine off automatically when the vehicle
stops moving. The engine starts
automatically when the driver wants to pull
away again. ESP ®
remains in its previously
selected status. Example: if ESP ®
was
deactivated before the engine was switched
off, ESP ®
remains deactivated when the
engine is switched on again.
If ESP ®


is deactivated and one or more wheels
start to spin, the ÷ ESP®
warning lamp in
the instrument cluster flashes. In such
situations, ESP ®
will not stabilize the vehicle.
It may be best to deactivate ESP ®
in the
following situations:
R when using snow chains
R in deep snow
R on sand or gravel
If you deactivate ESP ®
:
R ESP ®
no longer improves driving stability.
R traction control is still activated.60
Driving safety systems
Safety

R
Artists
R Albums
R Tracks
R Podcasts
R Genres
R Composers
R Audiobooks
R Videos
i Some playback categories contain the
entry All. If this entry has been selected,
the entire
content of the category selected
will be played.
The Videos category is available for
iPods ®
and iPhones ®
.
i The functions are available as soon as the
entire media content has been read and
analyzed. For certain functions, such as
Keyword search, this can take several
minutes. The length of time required for
reading the data depends on the size of the
media content and the device connected.
If the same device is reconnected with
unchanged media content, these functions
are available much more quickly. However,
if you change the media content, it has to
be read and analyzed again. Calling up a category list
Example: category list
X
Select Search in the basic display by
sliding VÆ and

turning cVd the COMAND
controller and press W to confirm.
The category list appears.
i Search is not available until the device
has been activated.
i When the

media content of the connected
device is being read, Keyword Search
appears in gray.
The length of time required for reading the
data depends on the size of the media
content and the connected device and may
take a few minutes. When the device is next
started or reconnected, the advanced
functions will be quickly available.
However, if you change the media content
on your iPod ®
/iPhone ®
, it has to be read
and analyzed again. Audio
449
COMAND Z

X
To revert to the original size: press W the
COMAND controller.
or
X Press the % back button.
Exiting the picture viewer X
Select Back To Menu in the menu by
turning cVd the COMAND controller and
press W to confirm. X
To start playing music: confirm Search
by pressing W.
The category list appears (Y

page 433).
X Select a category by turning cVd the
COMAND controller and press W to
confirm.
X Select other entries within the category
(e.g. track, album) until the music starts
playing. SIRIUS Weather
Introduction
i This function

is currently not available for
Canada.
For the reception of weather forecasts via
satellite radio, you will need a SIRIUS XM
Satellite Weather subscription.
When the Call SIRIUS to activate
system at 888-539-7474 message with the
SIRIUS device identification number appears,
you will first have to obtain access to the
weather service. A description of the procedure can be found in the "Registering
satellite radio" section
(Y

page 416).
COMAND can receive weather forecasts via
satellite radio for the entire USA (including
Alaska and Hawaii). The received weather
data can be displayed as an information chart
(daily forecast, five-day forecast, detailed
information) or on the weather map.
The weather data received from a weather
station is stored in COMAND for one hour. It
can therefore be displayed again immediately
after restarting the engine (for example after
refueling).
The weather map can display the following
weather data with symbols:
R rain radar
R storm characteristics
R areas of high-pressure/low-pressure,
weather fronts
R course of tropical cyclones (hurricanes,
typhoons)
R wind direction and speeds
i The rain radar cannot be displayed for
Alaska, Hawaii and Puerto Rico.
i Hurricane: term used to describe the
tropical cyclones that primarily develop in
the Atlantic, North Pacific and South Pacific
oceans. The wind speeds are above
74 mph (118 km/h). Five categories are
used to classify the strength of a hurricane.
Typhoon: term used to describe a tropical
cyclone that develops in the northwestern
Pacific. The wind speeds are in the category
of a hurricane. SIRIUS Weather
461
COMAND Z

MOExtended tires (tires with run-flat
properties)
G
WARNING
When driving in emergency mode, the driving
characteristics deteriorate, e.g. when
cornering, accelerating quickly and when
braking. There is a risk of an accident.
Do not exceed the stated maximum speed.
Avoid abrupt

steering and driving maneuvers,
and driving over obstacles (curbs, potholes,
off-road). This applies in particular to a laden
vehicle.
Stop driving in emergency mode if:
R you hear banging noises.
R the vehicle starts to shake.
R you see smoke and smell rubber.
R ESP ®
is intervening constantly.
R there are tears in the sidewalls of the tire.
After driving in emergency mode, have the
wheel rims checked at a qualified specialist
workshop with regard to their further use. The
defective tire must be replaced in every case.
With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there is a total loss of
pressure in one or more tires.
MOExtended tires may only be used in
conjunction with the activated tire pressure
loss warning system or with the activated tire
pressure monitor.
The maximum driving distance is
approximately 50 miles (80 km) when the
vehicle is partially laden, and approximately
18 miles (30 km) when the vehicle is fully
laden.
In addition to the vehicle load, the driving
distance possible depends upon:
R speed
R road condition
R outside temperature
The driving distance possible in run-flat mode
may be reduced by extreme driving conditions/maneuvers, or it can be increased
through a moderate style of driving.
The maximum permissible distance which
can
be

driven in run-flat mode is counted from
the moment the tire pressure loss warning
appears in the multifunction display.
You must not exceed a maximum speed of
50 mph (80 km/h).
i When changing or replacing one or all of
the tires, note the label "MOExtended".
Take note also of the size specified for the
vehicle.
i Vehicles equipped with MOExtended tires
are not equipped with a TIREFIT kit at the
factory. It is therefore recommended that
you additionally equip your vehicle with a
TIREFIT kit if you mount tires that do not
feature run-flat properties, e.g. winter tires.
A TIREFIT kit is available, for example, from
a qualified specialist workshop. TIREFIT kit
Using the TIREFIT kit TIREFIT is a tire sealant.
You can use TIREFIT to seal punctures of up
to
0.16

in (4 mm), particularly those in the tire
tread. You can use TIREFIT at outside
temperatures down to Ò4 ‡ (Ò20 †). G
WARNING
In the following situations, the tire sealant is
unable to provide sufficient breakdown
assistance, as it is unable to seal the tire
properly:
R there are

cuts or punctures in the tire larger
than those mentioned above.
R the wheel rim is damaged.
R you have driven at very low tire pressures
or on a flat tire.
There is a risk of an accident.
Do not drive any further. Contact a qualified
specialist workshop. 510
Flat tire
Roadside Assistance

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please
note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 31).Important safety notes
G
WARNING
If
wheels and tires of the wrong size are used,
the wheel brakes or suspension components
may be damaged. There is a risk of accident.
Always replace wheels and tires with those
that fulfill the specifications of the original
part (designation, manufacturer, model). G
WARNING
A flat tire severely impairs the driving,
steering and braking characteristics of the
vehicle. There is a risk of accident.
Tires without run-flat characteristics:
R do not drive with a flat tire.
R immediately replace the flat tire with your
emergency spare wheel or spare wheel, or
consult a qualified specialist workshop.
Tires with run-flat characteristics:
R pay attention to the information and
warning notices

on MOExtended tires (tires
with run-flat characteristics).
Accessories that are not approved for your
vehicle by Mercedes-Benz or are not being
used correctly can impair the operating
safety. Before purchasing and using non-approved
accessories, visit a qualified specialist
workshop 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 552).
Information on air pressure for the tires on
your vehicle can be found:
R on the vehicle's Tire and Loading
Information placard on the B-pillar
R on the tire pressure label on the fuel filler
flap
R under "tire pressure" Operation
Information on driving
If the vehicle is heavily laden, check the tire
pressures and correct them if necessary.
While driving, pay attention to vibrations,
noises and unusual handling characteristics,
e.g. pulling

to one side. This may indicate that
the wheels or tires are damaged. If you
suspect that a tire is defective, reduce your
speed immediately. Stop the vehicle as soon
as possible to check the 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 tires
and wheels checked at a qualified specialist
workshop.
When parking your 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 elevations, try
to do so slowly and at an obtuse angle.
Otherwise, the tires, particularly the
sidewalls, may be damaged. 526
Operation
Wheels and tires

Selecting, mounting and replacing
tires
R Only mount tires and wheels of the same
type and make.
R Only mount tires of the correct size onto
the wheels.
R Break in new tires at moderate speeds for
the first
60 miles (100 km). They only reach
their full performance after this distance.
R Do not drive with tires which have too little
tread depth. as this significantly reduces
the traction on wet roads (hydroplaning).
R Replace the tires after six years at the
latest, regardless of wear. MOExtended tires (tires with run-flat
properties)
With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there is a total loss of
pressure in one or more tires.
MOExtended tires may be used only in
conjunction with the activated tire pressure
loss warning system or the activated tire
pressure monitor and only on wheels
specifically tested by Mercedes-Benz.
Notes on driving with MOExtended tires with
a flat tire ( Y
page 510).
i Vehicles equipped

with MOExtended tires
are not equipped with a TIREFIT kit at the
factory. It is therefore recommended that
you additionally equip your vehicle with a
TIREFIT kit if you mount tires that do not
feature run-flat properties, e.g. winter tires.
A TIREFIT kit can be obtained from a
qualified specialist workshop. Winter operation
General notes
Have your

vehicle winterproofed at a qualified
specialist workshop at the onset of winter. Observe the notes in the "Changing a wheel"
section (
Y page 547). Driving with summer tires
At temperatures

below 45 ‡ (+7 †), summer
tires lose elasticity and therefore traction and
braking power. Change the tires on your
vehicle to M+S tires. Using summer tires at
very cold temperatures could cause tears to
form, thereby damaging the tires
permanently. Mercedes-Benz cannot accept
responsibility for this type of damage. M+S tires
G
WARNING
M+S tires with a tire tread depth of less than
ã

in

(4 mm) are not suitable for use in winter
and do not provide sufficient traction. There
is a risk of an accident.
M+S tires with a tread depth of less than ã
in (4 mm) must be replaced immediately.
At temperatures below 45 ‡ (+7 †), use
winter tires or all-season tires. Both types of
tire are identified by the M+S marking.
Only winter tires bearing the i snowflake
symbol in addition to the M+S marking
provide the best possible grip in wintry road
conditions.
Only these tires will allow driving safety
systems such as ABS and ESP ®
to function
optimally in winter. These tires have been
developed specifically for driving in snow.
Use M+S tires of the same make and tread on
all wheels to maintain safe handling
characteristics.
Always observe the maximum permissible
speed specified for the M+S tires you have
mounted. 528
Winter operation
Wheels and tires

Once the winter tires are mounted:
X
Check the tire pressures (Y page 533).
X Restart the tire pressure monitor
(Y page 534). Snow chains
! You must drive at raised vehicle level
(level 1)
if snow chains have been mounted.
The vehicle may otherwise be damaged.
! 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".
! If snow chains are mounted on the front
wheels, the snow chains could grind
against the bodywork or components of the
chassis. This could result in damage to the
vehicle or the tires.
For safety reasons, Mercedes-Benz
recommends that you only use snow chains
that have been specially approved for your
vehicle by Mercedes-Benz, or are of a
corresponding standard of quality.
If you intend to mount snow chains, please
bear the following points in mind:
R Snow chains cannot be mounted on all
wheel-tire combinations; see the
information under "Wheel and tire
combinations" in the "Wheels and tires"
section.
R Mount snow chains only in pairs and only
on the rear wheels. Observe the
manufacturer's mounting instructions.
R Only use snow chains when driving on
roads completely covered by snow.
Remove the snow chains as soon as
possible when you come to a road that is
not snow-covered.
R Local regulations may restrict the use of
snow chains. Observe the relevant
regulations when mounting snow chains. R
Do not exceed the maximum permissible
speed of 30 mph ( 50 km/h).
R On vehicles

with Active Body Control (ABC),
you must drive at a raised vehicle level if
snow chains have been mounted
(Y page 179).
i You may wish to deactivate ESP ®
when
pulling away with snow chains mounted
(Y page 59). This way you can allow the
wheels to spin in a controlled manner,
achieving an increased driving force
(cutting action). Tire pressure
Tire pressure specifications
Important safety notes G
WARNING
Tires with tire pressures that are too low or
too high are associated with the following
hazards:
R they can

burst, in particular if the vehicle is
heavily laden or when driven at high
speeds.
R the tires can wear excessively and/or
unevenly, which can severely impair tire
traction.
R the driving, steering and braking
characteristics may be severely impaired.
There is a risk of accident.
Follow recommended tire inflation pressures
and check the pressure of all the tires
including the spare wheel:
R monthly, at least
R if the load changes
R before beginning a long 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
pressure tables are examples. Tire Tire pressure
529
Wheels and tires Z

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 pressure 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 a qualified specialist workshop.
Tire and Loading Information placard
:
Recommended tire pressures
The Tire and Loading Information placard is
on the B-pillar on the driver's side of the
vehicle ( Y page 537).
The Tire and Loading Information placard
contains the

recommended tire pressures for
cold tires. The recommended tire pressures
are valid for the maximum permissible load
and up to the maximum permissible vehicle
speed.
Tire pressure table The tire pressure table is on the inside of the
fuel filler flap. Example: tire pressure table for all tires permitted
for this vehicle by the factory
The tire pressure table contains the
recommended pressures for cold tires for
various operating conditions, i.e. differing
load and speed conditions.
Example: tire pressure table with tire dimensions
If a
tire size precedes a tire pressure, the tire
pressure information following is only valid
for that tire size. The load conditions "partially
laden" and "fully laden" are defined in the
table for different numbers of passengers and
amounts of luggage. The actual number of
seats may differ. 530
Tire pressureWheels and tires