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 test course. For example, a tire graded 150 would wear one and one-half times as well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm, due to variations in driving habits, service practices and differences in road characteristics and climate conditions.
See also:
Slippery road surfaces
WARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing point ...
Driving with summer tires
Observe the notes in the "Winter operation" section (). ...
Safety & Features
As of this writing, neither the National Highway Traffic Safety
Administration nor the Insurance Institute for Highway Safety has tested the
E-Class wagon. (IIHS has tested the E-Class sedan, but ...