Mercedes-Benz GL-Class: Overview of Tire Quality GradingStandards
The Uniform Tire Quality Grading is a U.S.
Government requirement. Their purpose is to provide drivers with consistent and reliable information regarding tire performance. Tire manufacturers are required to grade tires using three performance factors: tread wear 1, tire traction 2, and temperature resistance 3. Although not a Government of Canada requirement, all tires made for sale in North America have these grades branded on the sidewall.
The actual values for tires are vehiclespecific
and may deviate from the values in
the illustration.
Where applicable, the tire grading information can be found on the tire sidewall between the tread shoulder and maximum tire width.
For example:
All passenger car tires must conform to the statutory safety requirements in addition to these grades.
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified
U.S. government course. For example, a tire
graded 150 would ...
See also:
If the Vehicle Is Stuck
Slowly and cautiously spin the wheels to free the vehicle when stuck in sand,
mud, ice, or snow. See “Rocking Your Vehicle to Get It Out” later in this section.
If the vehicle has a traction sys ...
All-Wheel Drive
It is not necessary to check the all–wheel drive lubricant levels.
► fluid leak is the only reason for fluid loss. If a leak occurs, take the vehicle
to the dealer as soon as possible. ...
Automatic transmission
7 speed automatic transmission
The automatic transmission in your vehicle
is electronically controlled by a transmission
control module to produce maximum
efficiency and smooth operation.
Sho ...