2014 MERCEDES-BENZ E-Class CABRIOLET width

Step 3
Example 1 Example 2 Example 3
Permissible load
(maximumg
ross
vehicle weight rating
from the Tire and
Loading Information
placard minus the
gross weight of all
occupants) 1500 lbs (680 kg)
0019750 lbs (340 kg) =
750 lbs (340 kg) 1500 lbs (680 kg)
0019540 lbs (245 kg)
=960 lbs (435 kg) 1500 lbs (680 kg)
0019150 lbs (68 kg) =
1350 lbs (612 kg)
Vehicle identification plate
Even if you have calculated the total cargo
carefully, you should still make sure tha tthe
gross vehicle weight rating and the gross axle
weight rating are not exceeded. Details can
be found on the vehicle identification plate on
the B-pillar on the driver's side of the vehicle
(Y page 355).
Permissible gross vehicle weight: the
gross weight of the vehicle, all passengers,
load and trailer load/noseweight (if
applicable) must not exceed the permissible
gross vehicle weight.
Gross axle weight rating: the maximum
permissible weight that can be carried by one
axle (front or rear axle).
To ensure that your vehicle does not exceed
the maximum permissible values (gross
vehicle weight and maximum gross axle
weight rating), have your loaded vehicle
(including driver, occupants, cargo, and full
trailer load if applicable) weighed on a
suitable vehicle weighbridge. All about wheels and tires
Uniform Tire Quality Grading
Standards
Overview of Tire Quality Grading
Standards Uniform Tire Quality Grading Standards are
U.S. government specifications. Their
purpose is to provide drivers with uniform
reliable information on tire performance data.
Tire manufacturers have to grade tires using
three performance factors:
0002tread wear
grade, 0003traction grade and 0023temperature
grade. These regulations do not apply to
Canada.N evertheless, all tires sold in North
America are provided with the corresponding
quality grading markings on the sidewall of
the tire.
Where applicable, the tire grading
information can be found on the tire sidewall
between the tread shoulder and maximum
tire width. All about wheels and tires
359Wheels and tires Z

Tire labeling
Overview 0002
Unifor mTire Quality Grading Standard
(Y page 365)
0003 DOT, Tire Identification Number
(Ypage 364)
0023 Maximum tire load (Y page 363)
0022 Maximum tire pressure (Y page 350)
0020 Manufacturer
0021 Tire material (Y page 364)
0014 Tire size designation, load-bearing
capacity and speed index (Y page 361)
0015 Load index (Y page 363)
0016 Tire name
The markings described above are on the tire
in additio nto the tire name (sales
designation) and the manufacturer's name.
i Tire data is vehicle-specific and may
deviate from the data in the example.
Tire size designation, load-bearing
capacity and speed rating G
WARNING
Exceeding the stated tire load-bearing
capacity and the approved maximum speed
could lead to tire damage or the tire bursting.
There is a risk of accident. Therefore, only use tire types and sizes
approved for your vehicle model. Observe the
tire load rating and speed rating required for
your vehicle.
0002
Tire width
0003 Nominal aspect ratio in %
0023 Tire code
0022 Rim diameter
0020 Load bearing index
0021 Speed rating
General: depending on the manufacturer's
standards, the size imprinted in the tire wall
may not contain any letters or may contain
one letter that precedes the size description.
If there is no letter preceding the size
description (as shown above): these are
passenger vehicle tires according to
European manufacturing standards.
If "P" precedes the size description :these are
passenger vehicle tires according to U.S.
manufacturing standards.
If "LT" precedes the size description: these
are light truck tires according to U.S.
manufacturing standards.
If "T" precedes the size description: these are
compact emergency spare wheels at high tire
pressure, to be used only temporarily in an
emergency.
Tire width: tire width0002shows the nominal
tire width in millimeters.
Aspect ratio: aspect ratio0003is the size ratio
between the tire height and tire width and is
shown in percent.T he aspect ratio is All about wheels and tires
361Wheels and tires Z

calculated by dividing the tire width by the tire
height.
Tire code:
tire code0023specifies the tire type.
"R" represents radial tires; "D" represents
diagonal tires; "B" represents diagonal radial
tires.
Optionally, tires with a maximum speed of
over 149 mph (240 km/h) may have "ZR" in
the size description, depending on the
manufacturer (e.g. 245/40 ZR 18).
Rim diameter: rim diameter0022is the
diameter of the bead seat, not the diameter
of the rim flange. The rim diameter is
specified in inches (in).
Load-bearing index: load-bearing index0020
is a numerical code that specifies the
maximum load-bearing capacity of a tire.
Do not overload the tire sby exceeding the
specified load limit. The maximum
permissible load can be found on the
vehicle's Tire and Loading Information
placard on the B-pillar on the driver's side
(Y page 355).
Example:
Load-bearing index 91 indicates a maximum
load of 1356 lb (615 kg) that the tires can
bear. For further information on th emaximum
tire load in kilograms and lbs, see
(Y page 363).
For further information on the load bearing
index, see "Load index" ( Ypage 363).
Speed rating: speed rating0021specifies the
approved maximum speed of the tire.
i Tire data is vehicle-specific and may
deviate from the data in the example.
Regardless of the speed rating, always
observe the speed limits. Drive carefully and
adapt your driving style to the traffic
conditions.
Summer tires Index Speed rating
Q up to 100 mph (160 km/h)
R up to 106 mph (170 km/h) Index Speed rating
S up to 112 mph (180 km/h)
T up to 118 mph (190 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
W up to 168 mph (270 km/h)
Y up to 186 mph (300 km/h)
ZR...Y up to 186 mph (300 km/h)
ZR...(..Y) over 186 mph (300 km/h)
ZR over 149 mph (240 km/h)
R
Optionally, tires with a maximum speed of
over 149 mph (240 km/h) may have "ZR"
in the size description, depending on the
manufacturer (e.g. 245/40 ZR18).
The service specificatio nis made up of
load-bearing index 0020and speed rating
0021.
R If the size description of your tire includes
"ZR" and there are no service
specifications, ask the tire manufacturer in
order to find out the maximum speed.
If a service specification is available, the
maximum speed is limited according to the
speed rating in the service specification.
Example: 245/40 ZR18 97 Y.In this
example, "97 Y" is the service specification.
The letter "Y" represents the speed rating.
The maximum speed of the tire is limited to
186 mph (300 km/h).
R The size descriptio nfor all tires with
maximum speeds of over 186 mph
(300 km/h) must include "ZR", andthe
service specification must be given in
parentheses. Example:
275/40 ZR 18 (99 Y). Speed rating "(Y)"
indicates that the maximum speed of the
tire is over 186 mph (300 km/h). Ask the
tire manufacturer about the maximum
speed. 362
All about wheels and tiresWheels and tires

Curb weight
The weight of a vehicle with standard
equipment including the maximum capacity
of fuel, oil and coolant
.Italso includes the air-
conditioning system and optional equipment
if these are installed in the vehicle, but does
not include passengers or luggage.
Maximum load rating
The maximum tire load is the maximum
permissible weight in kilograms or lbs for
which a tire is approved.
Maximum permissible tire pressure
Maximum permissible tire pressure for one
tire.
Maximum load on one tire
Maximum load on one tire. This is calculated
by dividing the maximum axle load of one axle
by two.
PSI (pounds per square inch)
As tandard uni tofmeasure for tire pressure.
Aspect ratio
Relationship between tire height and tire
width in percent.
Tire pressure
This is pressure inside the tire applying an
outward force to each square inch of the tire's
surface. The tire pressure is specified in
pounds per square inch (psi), in kilopascal
(kPa) or in bar. The tire pressure should only
be corrected when the tires are cold.
Cold tire pressure
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 been driven for less than
1 mile (1.6 km). Tread
The part of the tire that comes into contact
with the road.
Bead
The tire bead ensures that the tire sits
securely on the wheel. There are several steel
wires in the bead to prevent the tire from
coming loose from the wheel rim.
Sidewall
The part of the tire between the tread and the
bead.
Weight of optional extras
The combined weight of those optional extras
that weigh more than the replaced standard
parts and more than 2.3 kilograms (5 lbs).
These optional extras, such as high-
performance brakes, level control, a roof rack
or a high-performance battery, are not
included in the curb weight and the weight of
the accessories.
TIN (Tire Identification Number)
This is a unique identifier which can be used
by a tire manufacturer to identify tires, for
example for a product recall, and thus identify
the purchasers. The TIN is made up of the
manufacturer's identity code, tire size, tire
type code and the manufacturing date.
Load bearing index
The load bearing index (also load index) is a
code that contains the maximum load bearing
capacity of a tire.
Traction
Traction is the result of friction between the
tires and the road surface.
Treadwear indicators
Narrow bars (tread wear bars) that are
distributed over the tire tread. If the tire tread
is level with the bars, the wear limit of 0009in
(1.6 mm) has been reached. 366
All about wheels and tiresWheels and tires

Missing values were not available at time of
going to print. All models
Vehicle width
including exterior
mirrors
79.4 in (2016 mm)
Wheelbase
108.7 in (2760 mm)
Vehicle height
when opening/
closing the roof,
Cabriolet only
80.5 in (2045 mm)
Maximum roof
load, Coupe only
220 lb (100 kg)
Maximum trunk
load
220 lb (100 kg)
E 350
Vehicle length
185.2 in (4703 mm)
Vehicle height,
Coupe
55.0 in (1397 mm)
Vehicle height,
Cabriolet
55.0 in (1398 mm)
Turning radius
36.6 ft (11.15 m)
E 350 4MATIC
Vehicle length
185.2 in (4703 mm)
Vehicle height
55.0 in (1397 mm)
Turning radius
36.6 ft (11.15 m)
E 550
Vehicle length
186.9 in (4746 mm)
Vehicle height,
Coupe
55.0 in (1397 mm) E 550
Vehicle height,
Cabriolet
55.0 in (1398 mm)
Turning radius
36.7 ft (11.19 m) Vehicle data
391Technical data Z