Mercedes-Benz SL 65 AMG Black Series Operator's Manual page 186

230_AKB; 1; 42, en-US
d2ureepe,
Operation
Tires and wheels
Tire type code
Tire type code may, at the option of the
4
manufacturer, be used as a descriptive code
for identifying significant characteristics of
the tire.
Date of manufacture
The date of manufacture identifies the
5
week and year of manufacture.
The first two figures identify the week,
starting with "01" to represent the first full
week of the calendar year. The second two
figures represent the year.
For example, "3202" represents the 32nd
week of 2002.
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Version: 2.11.7.1
Tire ply material
Plies in sidewall
1
Plies under tread
2
i
For illustration purposes only. Actual data
on tires are specific to each vehicle and
may vary from data shown in above
illustration.
This marking tells you about the type of cord
and number of plies in the sidewall and under
the tread.
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 bar.
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.