2019 MERCEDES-BENZ S-CLASS CABRIOLET tire pressure

Make sure
toobser vethefo llowing fur ther rela‐
te d subjec t:
R Notes on tire pressure (→ page377)
Rest arting the tire pressure moni toring sys‐
tem
Requ irements:
R The recommended tire pressure is cor rectly
set forth ere spective operating condition on
each of thefo ur wheels (→ page377).
Re start the tire pressure monitoring sy stem in
th efo llowing situations:
R The tire pressure has changed.
R The wheels or tires ha vebeen changed or
newly ins talled.
On-board computer: , Service .
Tires #
Swipe down wards on Touch Control on the
left-hand side of thesteering wheel.
The Use Current Pressures as New Refer-
ence Values? message is shown in the multi‐
function displa y. #
Press 0076toconfirm there start.
The Run Flat Indicator Restarted message is
shown in the multifunction displa y.
Cur rent wa rning messages are dele ted and
th e0077 yellow warning lamp goes out.
Af teryo u ha vedriven for a few minutes, the
sy stem checks whe ther the cur rent tire pres‐
su res are within the specified range. The cur‐
re nt tire pressures are then accep ted as ref‐
erence values and monitored.
Make sure toobser vethefo llowing fur ther rela‐
te d subjec t:
R Notes on tire pressure (→ page377) Ra
dio equipment appr oval of the tire pres‐
sure moni toring sy stem
Ra dio equipment appr oval numbers Countr
yRadio type appr oval number
Canada IC: 2546A-GG4T IC: 2546A-DG6W2D4
IC: 2546A-MC34MA4
Le présent appareil est conforme
aux CNR d'Indu strie Canada
applicables aux appareils radio
exe mpts de licence. L'exploi ta‐
tion est au torisée aux deux con‐
ditions suivantes:
(1) l'appare il ne doit pas produire
de brouillage, et
(2) l'utilisateur de l'appareil doit
accep terto ut brouillage radioé‐
lectrique subi, même si le
brouillage est susceptible d'en
compromettre lefonctionnement. Wheels and tires
383

%
The data shown in the illustration is example
data.
The Tire and Loading In form ation placard sho ws:
R Maximum number of seats 2according to
th e maximum number of people permitted to
tr ave l in theve hicle.
R Maximum permissible load 3comprises the
gross weight of all vehicle occupants, load
and luggage. R
Recommended tire pressures 1for cold
tires. The recommended tire pressures are
va lid forth e maximum permissible load and
up tothe maximum permissible vehicle
speed.
Please also no te:
R Information on permissible weights and loads
on theve hicle identification plate
(→ page 408).
R Information on tire pressure in the tire pres‐
sure table (→ page379).
Fu rther related subjects:
R Determ ining the maximum permissible load
(→ page 385)
R Notes on tire pressure (→ page377). De
term ining the maximum permissible load The
following steps ha vebeen de veloped as
re qu ired of all manufacturers under Title 49,
Code of U.S. Federal Regulations, Part57 5, pur‐
suant tothe "National Traf fic and Mo torVe hicle
Saf etyAc t of 1966". #
Ste p 1: locatethest atement "The combined
we ight of occupants and load should ne ver
exc eed XXX kgor XXX lbs." ("The combined
we ight of occupants and load should ne ver
exc eed XXX kgor XXX lbs.") on your vehicle's
Ti re and Loading In form ation placard. #
Ste p 2: determ ine the combined weight of
th e driver and passengers that will be tra vel‐
ing in your vehicle. #
Ste p 3: subtract the combined weight of the
driver and passengers from XXX kgor
XXX lbs. #
Ste p 4: there sulting figure equals the per‐
missible cargo and luggage load capacity. For
ex ample: If "XXX" equals 1400 lbs and there
are five occupants in your vehicle with a
we ight of 150 lbs each, the maximum cargo
and luggage load capacity is 650 lbs (1400 -
75 0 (5 x 150) = 650 lbs). #
Ste p 5: determ ine the combined weight of
luggage and load that theve hicle will be car‐
ry ing. For saf etyre asons, this we ight may not
safely exceed theav ailable cargo and lug‐
ga ge load capacity calculated in step 4. Wheels and tires
385

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

and one-half times as
well on the go vernment
te st track as a tire graded 100.
The relative per form ance of tires depends upon
th e actual conditions of their use, ho wever,and
may depart significantly from the norm due to
va riations in driving habits, service practices and
dif fere nces in road characteristics and climate
conditions.
Tr action grade &
DANG ER Risk of accident due toinade‐
qu ate traction
The traction grade assigned tothis tire is
based on stra ight-ahead braking traction
te sts, and does not include either accelera‐
tion, cornering, hydroplaning or peak traction
ch aracteristics. #
Alw ays adapt your driving style and
drive at a speed tosuit the pr evailing
traf fic and weather conditions. *
NO
TEDama getothe driv etra in from
wheelspin #
Avoid wheelspin. The traction grades – from highest
tolowest –
are AA, A,B and C. Those grades represent the
tire's ability tostop on wet pa vement as meas‐
ured under controlled conditions on specified
go vernment test sur faces made of asphalt and
concr ete.
Te mp erature grade &
WARNING Risk of accident from tire
ove rheating and tire failure
The temp erature grade forth is tire is es tab‐
lished for a tire that is proper ly inflated and
not overloaded. Excessive speed, underinfla‐
tion, or excessive loading, either separately
or in combination, can cause excessive heat
build-up and possible tire failure. #
Obser vethere commended tire pres‐
su res and regularly check the tire pres‐ sure of all tires including
the spare
wheel. #
Adjust the tire pressure as necessar y. The
temp erature grades are A (the highest), B
and C. They represent the tire's resis tance tothe
ge neration of heat and its ability todissipate
heat when tested under controlled conditions on
a specified indoor laboratory test wheel. Sus‐
ta ined high temp erature can cause the material
of the tire todegenerate and reduce tire life, and
exc essive temp erature can lead tosudden tire
fa ilure. Grade C cor responds toa le vel of per‐
fo rm ance which all passenger car tires must
meet under therequ irements of the US Depart‐
ment of Transpor tation. DO
T,Tire Identification Number (TIN) US tire
regulations stipulate that eve rytire man‐
ufactu rer or retreader mu stimprint a TIN in or
on the side wall of each tire produced. Wheels and tires
389

%
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

Preceding letter
1
1:
R Without: passenger vehicle tires according to
European manufactu ring standards.
R "P": passenger vehicle tires according toUS
manufacturing standards.
R "LT": light truck tires according toUS manu‐
fa cturing standards.
R "T": compact emer gency spa rewheels with
high tire pressure that are on ly designed for
te mp orary use in an emer gency.
Aspect ratio 3
3:
Ra tio between tire height and tire width in per‐
cent (ti reheight divided bytire width).
Tire code 4
4(tire type):
R "R" radial tire
R "D": bias ply tire
R "B": bias belted tires
R "ZR": radial tire with a maximum speed abo ve
14 9mp h (240 km/h) (optional) Rim diame
ter5
5:
The diam eter of the bead seat (not the diame ter
of therim flange). The rim diame ter is specified
in inches (in).
Load-bearing index 6 6:
Numerical code that specifies the maximum
load-bearing capacity of a tire (e.g. "91" cor re‐
sponds to1356 lbs (6 15kg)).
The load-bearing capacity of the tire must be at
least half the permissible axle load of your vehi‐
cle. Do not overload the tires byexc eeding the
specified load limit.
See also:
R Maximum permissible load on theTire and
Loading In form ation placard (→ page 384)
R Maximum tire load (→ page 390)
R Load ind ex
Speed rating 7 7:
Specifies the appr oved maximum speed of the
tire. %
An electronic speed limi ter pr events your
ve hicle from exceeding a speed of 130mph
(2 10 km/h).
Ma kesure that your tires ha vetherequ ired
speed rating. You can obtain information on the
re qu ired speed rating from an au thorized
Mercedes-Benz Center.
Summer tires Inde
xS peedrating
Qu pto 100mp h (160 km/h)
Ru pto 106mp h (170 km/h)
Su pto 112mp h (1 80 km/h)
Tu pto 118mp h (190 km/h)
Hu pto 130mp h (2 10km/h)
Vu pto 149mp h (2 40 km/h)
Wu pto 168mp h (270 km/h)
Yu pto 186mp h (3 00 km/h) 392
Wheels and tires

Inde
xS peedrating
ZR...Y 1
upto186mp h (3 00 km/h)
ZR...(..Y) 1
over18 6mp h (3 00 km/h)
ZR 1
over14 9mp h (240 km/h) R
Specifying the speed rating as the "ZR" index
in tire code 4is optional for tires up to
18 6mp h (3 00 km/h).
R Ifyo ur tire code 4includes "ZR" and there
is no speed rating 7,find out what the max‐
imum speed is from the tire manufacturer.
R If load-bearing index 6and speed rating 7
are in brac kets, the maximum speed rating of
yo ur tire is abo ve186mp h (300 km/h). To
fi nd out the maximum speed, ask the tire
manufacturer. All-weather tires and winter tires Inde
xS peedrating
Q M+S 2
upto100mp h (160 km/h)
T M+S 2
upto118mp h (1 90 km/h)
H M+S 2
upto130mp h (2 10km/h)
V M+S 2
upto149mp h (240 km/h) Wi
nter tires bear the004D snowflake symbol
and fulfill therequ irements of theRu bber Manu‐
fa cturers Association (RMA) and theRu bber
Association of Canada (RAC) rega rding the tire
traction on sno w.
Load index 8
8:
R No specification given: standard load (SL)
tire
R "XL" or "Extra Load": extra load tire or rein‐
fo rc ed tire
R "Light Load": light load tire R
"C", "D", "E": a load range that depends on
th e maximum load that the tire can car ryat a
cer tain pressure Definition of
termsfo r tires and loading
Ti re stru ctureand characteristics: describes
th e number of la yers or the number of rubber-
coated belts in the tire conta ct surface and the
tire wall. These are made of steel, nylon, poly‐
es ter and other materials.
Bar: metric unit for tire pressu re.
14 .5038 pounds per square inch (psi) and
10 0 kilopascal (kPa) is the equivalent of one bar.
DOT (Department of Transpo rtation): DOT-
mar ked tires fulfill therequ irements of the
US Department of Transpor tatio n.
Av erage weight of theve hicle occupants: the
number of vehicle occupants for which th eve hi‐
cle is designed, multiplied by150 lb (68 kg).
1 "ZR" stated in the tire code.
2 Or "M+S 004D"for winter tires Wheels and tires
393