2018 MERCEDES-BENZ E-CLASS COUPE Owner's Manual

#Step 1: locatethest atement "The combined
we ight of occupants and cargo should ne ver
exc eed XXX kgor XXX lbs." ("The combined
we ight of occupants and cargo should ne ver
exc eed XXX kgor XXX lbs.") on your vehicle's
Ti re and Loading Info rmation placard.
#Ste p 2: determ ine the combined weight of
th e driver and passengers who 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 cargo that theve hicle will be
car rying. For saf etyre asons, this we ight may
not safely exceed theav ailable cargo and lug‐
ga ge load capacity calculated in step 4. 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 permissi‐
ble axle load rating of your vehicle are not excee‐
ded. De tails can be found on theve hicle identifi‐
cation plate.
#Ha ve 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:
RCalculation example for de term ining the max‐
imum load (→page 351)
RTi re and Loading Info rmation placard
(→page 349)
RTi re pressure table (→page 345)
RVe hicle identification plate
Calculation example for de term ining the
ma ximum load
The following table sho wsexamples of how to
calculate tota l 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
Info rmation placard (
→page 349).
The higher thewe ight of all the occupants, the
smaller the maximum load for lug gage .
Wheels and tires 351

Step 1
Example 1E xamp le 2
Combined maximum weight of occupants and
cargo (data from theTire and Loading Info rma‐
tion placard) 15
00 lbs (680 kg)1 500 lbs (680kg)
Ste p 2
Example 1E xamp le 2
Numb er of people in theve hicle (driver and
occupants) 51
Distribution of the occupant sF ront: 2
Re ar: 3 Fr
ont: 1
We ight of occupant sO ccupant 1:150 lbs (68 kg)
Occupant 2: 180 lbs (82 kg)
Occupant 3: 160 lbs (73 kg)
Occupant 4: 140 lbs (63 kg)
Occupant 5: 120 lbs (54 kg) Occupant 1: 200 lbs (91
kg)
To talwe ight of all occupant s7 50 lbs (340kg)2 00 lbs (91kg)
352
Wheels and tires

Step 3
Example 1E xamp le 2
Pe rm issible load (maximum grossve hicle weight
ra ting from theTire and Loading Info rmation
placard minus the gross weight of all occupants) 15
00 lbs (680 kg)Ò 75 0 lbs (340 kg) = 750 lbs
(340 kg) 15
00 lbs (680 kg)Ò 200 lbs (91 kg) = 1300 lbs
(589 kg)
Wheels and tires 353

Tire labeling
Overview of tire labeling
1Uni form Ti reQuality Grading Standard
(→page 354)
2DOT (Department of Transpor tation), (TIN)
Ti re Identification Number (→page 355)
3Maximum tire load (→page 356)
4Maximum tire pressure (→page 356)
5Manufacturer
6Tire characteristics (→page 357)
7Tire size designation, load rating, speed rat‐
ing and load ind ex(→page 357)
8Tire 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 "Unifo rm TireQuality 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:1Tread weargrade
2Traction grade
3Te mp 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
354
Wheels and tires

and one-half times aswell 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 drivin gst yle and
drive at a speed tosuit the pr evailing
traf fic and weather conditions.
* NO
TEDama getothe driv etra in from
wheelspin
#Av oid 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‐
sure s and regularly check the tire pres‐
sure of all tires including the spare
wheel.
#Ad just the tire pressure as necessar y.
Thetemp 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 eratures 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 must imprint a TIN in or
on the side wall of each tire produced.
Wheels and tires 355

%The data shown in the image is example
data.
The TIN is a unique identification number to
identify tires and comprises thefo llowing:
RDOT (Department of Transport ation):tire
symbol mar ks1 indicating that the tire
complies with therequ irements of the US
Department of Transpor tation.
RManufacturer 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 tire
ha ve a code with four symbols. Further infor‐
mation on retreaded tires (
→pa ge 362).
RTire size: identifier 3describes the tire
size.
RTi re type code: tire type code 4can be
used bythe manufacturer as a code to
describe specific characteristics of the tire.
RManufacturing 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
Info rmation placard on the B-pillar on the driv‐
er's side (
→page 349).
Specifications for maximum tire pressure
%
The da tashown in the image is example
data.
356 Wheels and tires

Neverexc 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 descri besthe type of tire cord
and the number of la yers in side wall1 and
under tire tread 2.
Tire size designation, load-bearing capacity,
speed rating and load index
&
WARNING Risk of injury thro 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
damage andtothe 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.
1Preceding letter
2Nominal tire width in millime ters
3Aspect ratio in %
4Tire code
5Rim diame ter
6Load-bearing index
7Speed rating
8Load ind ex
% The data shown in the image is example
data.
Info rmation about reading tire data can be
obtained from any qualified specialist workshop.
Wheels and tires 357

Preceding letter1:RWithout: 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 only designe dfo r
te mp orary use in an emer gency.
Aspect ratio 3
:
size ratio between tire height and tire width in
pe rcent (tire height divided bytire width).
Tire code 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
:
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
:
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:
RMaximum permissible load on theTire and
Loading Info rmation placard (→page 349)
RMaximum tire load (→page 356)
RLoad ind ex
Speed rating 7
:
Specifies the appr oved maximum speed of the
tire. %
An electronic speed limite r prevents your
ve hicle from exceeding a speed of 130mp h
(2 10 km/h).
Make surethat 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(210 km/h)
Vu pto 149mp h(2 40 km/h)
Wu pto 168mp h (270 km/h)
Yu pto 186mp h(3 00 km/h)
358
Wheels and tires