2006 Mercedes SLK-Class Owner's Manual - Page 343
2006 Mercedes SLK-Class Manual
Page 343 highlights
Operation Tires and wheels Quality grades can be found, where applicable, on the tire sidewall between tread shoulder and maximum section width. For example: Treadwear Traction Temperature 200 AA A Treadwear The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half (1 1/2) 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. Traction The traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent the tire's ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance. Warning! All passenger car tires must conform to federal safety requirements in addition to these grades. G The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics. 342