2019 MERCEDES-BENZ S-CLASS CABRIOLET wheel size

Emer
gency Re
moving the saf etyve st The saf
etyve sts are located in stowage spaces
in the front door. #
Take the saf etyve st bag out of stowage
space 1. #
Open the saf etyve st bag and pull out the
saf etyve st.
% Safetyve sts can also be stored in there ar
door stowage spaces. 1
Maximum number of washes
2 Maximum wash temp erature
3 Do not bleach
4 Do not iron
5 Do not tumble dry
6 Do not dry clean
7 This is a class 2 vest
The requ irements defined bythe legal standard
are on ly fulfilled in thefo llowing cases:
R ifth e saf etyve st isthe cor rect size
R the saf etyve st is fully closed whilst being
wo rn Re
place the saf etyve st inthefo llowing cases:
R there flective strips are damaged or dirt on
th ere flective strips can no longer be
re mo ved
R the maximum number of washes is exceeded
R thefluorescence has faded Flat tire
Note
s on flat tires &
WARNING Risk of accident due toaflat
tire
A flat tire se verely affects the driving charac‐
te rist ics as well as thesteering and braking
of theve hicle.
Ti re s without run-flat characteristics: #
Do not drive on with a flat tire. #
Chan getheflat tire immediately with an
emer gency spa rewheel or spare wheel.
Alternativel y,consult a qualified spe‐
cialist workshop. 356
Breakdown assis tance

The tire pressure
table sho ws there commended
tire pressure for all tires appro vedfo rth is vehi‐
cle. The recommended tire pressures apply for
cold tires under various operating conditions, i.e.
loading and/or speed of theve hicle.
If one or more tire sizes precede a tire pressure,
th e tire pressure information following is only
va lid forth ose tire sizes.
The load conditions "partially laden" and "fully
laden" are defined in theta ble for dif fere nt num‐
be rs of passengers and amounts of luggage. The
actual number of seats may dif fer from this. Some tire pressure
tables only show therim
diame ter ins tead of the comple tetire size, e.g.
R18. The rim diame ter is part of the tire size and
can be found on the tire side wall (→ page 391).
Be sure toalso obse rveth efo llowing fur ther
re lated subjects:
R Notes on tire pressure (→ page377)
R Tire and Loading In form ation placard
(→ page 384) R
Maximum tire pressure (→ page 390) Checking tire pressu
res manually #
Read the tire pressure forth e cur rent operat‐
ing conditions from theTire and Loading
In fo rm ation placard or the tire pressure
ta ble. Obser vethe no tes on tire pressure. #
Remo vetheva lve cap of the tire tobe
ch ecked. #
Press the tire pressure gauge securely on to
th eva lve. #
Read the tire pressure. #
Ifth e tire pressure is lo werth an there com‐
mended value, inc rease the tire pressure to
th ere commended value. #
Ifth e tire pressure is higher than there com‐
mended value, release air. Todo so, press
down the me tal pin in theva lve, e.g. using
th e tip of a pen forex ample. Then check the
tire pressu reagain using the tire pressure
ga uge. #
Screw theva lve cap onto theva lve. 380
Wheels and tires

Fu
rther related subjects:
R Notes on tire pressure (→ page377)
R Tire pressure table (→ page379)
R Tire and Loading In form ation placard
(→ page 384) Ti
re pressure moni toring sy stem Fu
nction of the tire pressure moni toring sys‐
tem &
DANG ER Risk of accident due toincor‐
re ct tire pressure
Every tire, including the spare (if pr ovided),
should be checked when cold at least once a
month and inflated tothe pressure recom‐
mended bytheve hicle manufacturer (see
Ti re and Loading In form ation placard on the
B-pillar on the driver ’sside or the tire pres‐
sure label on the inside of the fuel filler flap
of your vehicle). If your vehicle has tires of a
dif fere nt size than the size indicated on the
Ti re and Loading In form ation placard or the tire pressu
retable, you need todeterm ine
th e proper tire pressure forth ose tires.
As an added saf etyfe ature, your vehicle has
been equipped with a tire pressure monitor‐
ing sy stem (TPMS) that illuminates a low tire
pressure indicator lamp when one or more of
yo ur tires are significantly underinflated.
Ac cording ly, if the low tire pressure indicator
lamp lights up, you should stop and check
yo ur tires as soon as possible, and inflate
th em tothe proper pressure. Driving on a
significant lyunderinflated tire causes the tire
to ov erheat and can lead totire failure.
Un derinflation also increases fuel consump‐
tion and reduces tire tread life, and may
af fect theve hicle's handling and braking abil‐
ity. Please no tethat the TPMS is not a substi‐
tute for proper tire maintenance, and it is the
driver's responsibility tomaintain cor rect tire
pressure, even if underinflation has not
re ached the le velto trig ger illumination of
th e TPMS low tire pressure indicator lamp.
Yo ur vehicle has also been equipped with a
TPMS malfunction indicator toindicate when th
e sy stem is not operating proper ly. The
TPMS malfunction indica tor is combined with
th e low tire pressure indicator lamp. When
th e sy stem de tects a malfunction, the indica‐
to r lamp will flash for appro ximately a minute
and then remain continuously illumina ted.
This sequence will continue upon subsequent
ve hicle start-ups as long as the malfunction
ex ists.
When the malfunction indicator is illumina‐
te d, the sy stem may not be able todetect or
signal low tire pressure as intended. TPMS
malfunctions may occur for a variet y of rea‐
sons, including the ins tallation of incompati‐
ble replacement or alternate tires or wheels
on theve hicle that pr eventthe TPMS from
functioning properly.
Alw aysch eck the TPMS malfunction warning
lamp af terre placing one or more tires or
wheels on your vehicle toensure that the
re placement or alternate tires and wheels
allow the TPMS tocontinue tofunction prop‐
erly. Wheels and tires
381

Even if
you ha vecalculated thetot al load care‐
full y,yo u should still make sure that the maxi‐
mum permissible gross mass and the maximum
permissible axle load of your vehicle are not
exc eeded. De tails can be found on theve hicle
identification plate. #
Have your loaded vehicle – including driver,
occupants and load – weighed on a vehicle
we ighbridge.
The measured values may not exceed the
maximum permissible values stated on the
ve hicle identification plate. Fu
rther related subjects:
R Calculation example for de term ining the max‐
imum load (→ page 386)
R Tire and Loading In form ation placard
(→ page 384)
R Tire pressure table (→ page379)
R Vehicle identification plate Calculation
example for de term ining the
ma ximum load The
following table sho wsexamples of how to
calculate total and load capacities with varying seating con
figurations and dif fere nt numbe rs
and sizes of occupants. The following examples
use a maximum load of 1500 lbs (680 kg).This
is for illustration purposes on ly.Make sure
yo u are using the actual load limit foryo ur vehi‐
cle stated on your vehicle's Tire and Loading
In fo rm ation placard (→ page 384).
The higher thewe ight of all the occupants, the
smaller the maximum load for lugga ge.
Ste p 1 Example
1E xamp le 2
Combined maximum weight of occupants and
load (data from theTire and Loading In form ation
placard) 15
00 lbs (680 kg)1 500 lbs (680kg)386
Wheels and tires

Ti
re labeling Overview of tire labeling
1
Uniform Ti reQuality Grading Standard
(→ page 388)
2 DOT,Tire Identification Number
(→ page 389)
3 Maximum tire load (→ page 390)
4 Maximum tire pressu re (→page 390) 5
Manufacturer
6 Characteristics of the tire (→ page 391)
7 Tire size designation, load-beari ng capacity,
speed rating and load ind ex (→page 391)
8 Tire name
% The da tashown in the image is example
data. Ti
re Quality Grading In accordance with
the US Department of Trans‐
por tation's "Uni form Ti reQuality Grading Stand‐
ards", tire manufacturers are requ ired tograde
th eir tires on the basis of thefo llowing thre e per‐
fo rm ance factors: 1
Tread weargrade
2 Traction grade
3 Temp erature grade
% The data shown in the image is example
data.
% The classification is not legally stipulated for
Canada, but it is general lystated.
Tr ead weargrade
The tread wear grade is a comparative rating
based on thewe arrate ofthe tire when tested
under controlled conditions on a specified test
track of the US Department of Transpor tation.
Fo rex ample, a tire graded 150wo uld wear one 388
Wheels and tires

%
The data shown in the image is example
data.
The TIN is a unique identification number to
identify tires and comprises thefo llowing:
R DOT (Department of Transpo rtation): tire
symbol mar ks1 indicating that the tire
complies with therequ irements of the US
Department of Transpor tation.
R Manufacturer identi fication code: manu‐
fa cturer identification code 2contains
de tails of the tire manufacturer. New tires
ha ve a code with two symbols. Retreaded
tires ha vea code with four symbols. Further
information on retreaded tires (→ page 396). R
Tire size: identifier 3describes the tire
size.
R Tire type code: tire type code 4can be
used bythe manufacturer as a code to
describe specific characteristics of the tire.
R Manufacturing date: manufacturing date
5 prov ides information about the age of a
tire. The 1st and 2nd positions represent the
calendar week and the 3rd and 4th positions
st ate theye ar of manufacture (e.g. "3208"
re presents the 32nd week of 2008). Information on
the maximum tire load %
The data shown in the image is example
data.
Maximum tire load 1isthe maximum permissi‐
ble weight for which the tire is appr oved.
Do not overload the tires by exceeding the speci‐
fi ed load limit. The maximum permissible load
can be found on theve hicle's Tire and Loading
In fo rm ation placard on the B-pillar on the driv‐
er's side (→ page 384). Specifications
for maximum tire pressure %
The da tashown in the image is example
data. 390
Wheels and tires

Ne
verexc eed maximum tire pressure 1speci‐
fi ed forth e tire. Information on tire
characteristics %
The data shown in the image is example
data.
This information desc ribes the type of tire cord
and the number of la yers in side wall1 and
under tire tread 2. Ti
re size designation, load-bearing capacity,
speed rating and load index &
WARNING Risk of inju rythro ugh exceed‐
ing the specified tire load rating or the
permissible speed rating
Exceeding the specified tire load rating or
th e permissible speed rating may lead totire
dama geand tothe tires bur sting. #
Therefore, only use tire types and sizes
appr ovedfo ryo ur vehicle model. #
Obser vethe tire load rating and speed
ra ting requ ired foryo ur vehicle. 1
Preceding letter
2 Nominal tire width in millime ters
3 Aspect ratio in %
4 Tire code
5 Rim diame ter
6 Load-bearing index
7 Speed rating
8 Load ind ex
% The data shown in the image is example
data.
In fo rm ation about reading tire data can be
obtained from any qualified specialist workshop. Wheels and tires
391

th
ese are ins talled on theve hicle, but does not
include passengers or luggage.
Maximum tire load: the maximum tire load is
th e maximum permissible weight in kilog rams or
lbs for which a tire is appr oved.
Maximum permissible tire pressure: maxi‐
mum permissible tire pressure for one tire.
Maximum load on one tire: maximum load on
one tire. This is calculated bydividing the maxi‐
mum axle load of one axle bytwo.
PSI (pounds per square in ch):standard unit of
measurement for tire pressu re.
Aspect ratio: ratio between tire height and tire
width in pe rcent.
Ti re pressure: pressure inside the tire applying
an outward forc eto eve rysquare inch of the tire.
The tire pressure is specified in pounds per
square inch (psi), in kilopascals (kPa) or in bar.
The tire pressure should only be cor rected when
th e tires are cold.
Cold tire pressure: the tires are cold when the
ve hicle has been par kedfo r at least 3 hours without direct sunlight on
the tires or theve hicle
has been driven for less than 1 mile (1.6 km).
Ti re contact sur face: the part of the tire that
comes into con tact wi th thero ad.
Ti re bead: the purpose of the tire bead is to
ensure that the tire sits securely on the wheel
ri m. There are se veral wire cores in the tire bead
to preve ntthe tire from changing length on the
wheel rim.
Side wall:the part of the tire between the tread
and the tire bead.
We ight of optional equipment: the combined
we ight of the optional equipment weighing more
th an there placed standard parts and more than
5 lbs (2.3 kg).This optional equipment, such as
high-per form ance brakes, le vel control sy stem, a
ro of luggage rack or high-per form ance bat teries,
is not included in the curb weight and thewe ight
of the accessories.
TIN (Tire Identification Number): a unique
identification number which can be used by a
tire manufactu rerto identify tires, forex ample,
in a product recall, and thus identify the pur‐
ch asers. The TIN is made up of the manufactur‐ er's identity code, tire size, tire type code and
th e manufacturing date.
Load-bearing index: the load-bearing index is a
code that con tains the maximum load-bearing
capacity of a tire.
Tr action: traction is the grip resulting from fric‐
tion between the tires and thero ad sur face.
We ar indicator: narrow bars (tread wear bars)
th at are distributed overth e tire conta ct surface.
If th e tire tread is le vel with the bars, thewe ar
limit of 1/ 16in (1.6 mm) has been reached.
Distribution of vehicle occupants: distribution
of vehicle occupants over designated seat posi‐
tions in a vehicle.
Maximum permissible pa yload weight: nomi‐
nal load and luggage load plus 150 lb (68 kg)
multiplied bythe number of seats in theve hicle. Wheels and tires
395