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:
Problems with PARKTRONIC
Problem
Possible causes/consequences and - Solutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately ...
Storing the current speed or calling up
the last stored speed
WARNING
The set speed stored in memory should only
be set again if prevailing road conditions and
legal speed limits permit. Possible
acceleration or deceleration differences
arising from r ...
Deactivating/activating PARKTRONIC
1 To deactivate/activate PARKTRONIC
2 Indicator lamp
If indicator lamp 2 lights up, PARKTRONIC is
deactivated.
PARKTRONIC is automatically activated
when you turn the SmartKey to position ...
