Mercedes-Benz 2005 E 320 CDI User Manual

Page 339

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337

Operation

Tires and wheels

Tire and loading terminology

Accessory weight

The combined weight (in excess of those
standard items which may be replaced) of
automatic transmission, power steering,
power brakes, power windows, power
seats, radio, and heater, to the extent that
these items are available as
factory-installed equipment (whether
installed or not).

Air pressure

The amount of air inside the tire pressing
outward on each square inch of the tire.
Air pressure is expressed in pounds per
square inch (psi), or kilopascal (kPa) or
bars.

Aspect ratio

Dimensional relationship between tire
section height and section width
expressed in percentage.

Bar

Another metric unit for air pressure. There
are 14.5038 pounds per square inch (psi)
to 1 bar; there are 100 kilopascals (kPa)
to 1 bar.

Bead

The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the
rim.

Cold tire inflation pressure

Tire inflation pressure when your vehicle
has been sitting for at least three hours or
driven no more than one mile (1.6 km).

Curb weight

The weight of a motor vehicle with stan-
dard equipment including the maximum
capacity of fuel, oil, and coolant, and, if so
equipped, air conditioning and additional
optional equipment, but without passen-
gers and cargo.

DOT (Department of Transportation)

A tire branding symbol which denotes the
tire meets requirements of the
U.S. Department of Transportation.

GAWR (Gross Axle Weight Rating)

The GAWR is the maximum permissible
axle weight. The gross vehicle weight on
each axle must never exceed the GAWR for
the front and rear axle indicated on the
certification label located on the driver's
door B-pillar.

GVW (Gross Vehicle Weight)

The GVW comprises the weight of the
vehicle including fuel, tools, spare wheel,
installed accessories, passengers and
cargo and, if applicable, trailer tongue
load. The GWV must never exceed the
GWVR indicated on the certification label
located on the driver's door B-pillar.

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