Mercedes-Benz R-Class 2007 Owners Manual - Manual (Page 394)

393
Operation
Tires and wheels
Rim diameter
The rim diameter 4 ( ୴ page 392) is the
diameter of the bead seat, not the
diameter of the rim edge. Rim diameter is
indicated in inches (in).
Tire load rating
The tire load rating 5 ( ୴ page 392) is a
numerical code associated with the
maximum load a tire can support.
For example, a load rating of 91 corre-
sponds to a maximum load of 1356 lbs
(615 kg) the tire is designed to support.
See also “Maximum tire load”
(
୴ page 397) where the maximum load as-
sociated with the load index is indicated in
kilograms and lbs.
For additional information on tire load
rating, see “Load identification”
(
୴ page 395).
Tire speed rating
The tire speed rating 6 ( ୴ page 392)
indicates the approved maximum speed
for the tire.
Warning!
G
The tire load rating must always be at least
half of the GAWR ( ୴ page 401) of your vehi-
cle. Otherwise, tire failure may be the result
which may cause an accident and/or seri-
ous personal injury to you or others.
Always replace rims and tires with the same
designation, manufacturer and type as
shown on the original part.
Warning!
G
Do not overload the tires by exceeding the
specified load limit as indicated on the plac-
ard located on the driver’s door B-pillar.
Overloading the tires can overheat them,
possibly causing a blowout. Overloading the
tires can also result in handling or steering
problems, or brake failure.
i Tire load rating 5 ( ୴ page 392) and tire
speed rating 6 ( ୴ page 392) are also referred
to as “service description”.
Warning!
G
Even when permitted by law, never operate
a vehicle at speeds greater than the
maximum speed rating of the tires.
Exceeding the maximum speed for which
tires are rated can lead to sudden tire
failure, causing loss of vehicle control and
possibly resulting in an accident and/or
personal injury and possible death, for you
and for others.