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 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:
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Manual interior lighting control
To switch the front interior lighting on/ off: press the
button.
To switch the rear interior lighting on/ off: press the
button.
To switch the reading lamps on/off: press the
button.
...
Cleaning the exterior lighting
Clean the plastic lenses of the exterior
lights with a wet sponge and a mild cleaning
agent, e.g. Mercedes-Benz car shampoo or
cleaning cloths.
Only use cleaning agents or
cleaning
...