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:
The windshield wipers are inoperative
The windshield wiper drive is malfunctioning.
Select another wiper speed on
the
combination switch.
Have the windshield wipers checked
at a
qualified specialist workshop. ...
Windshield/headlamp cleaning system
WARNING
Washer solvent/antifreeze is highly flammable. Do not spill washer solvent/ antifreeze
on hot engine parts, because it may ignite and burn. You could be seriously burned.
Use MB Summe ...
Please bear the following in mind
At the onset of winter, have your vehicle
winterproofed at a qualified specialist
workshop, e.g. at an authorized Mercedes-Benz Center.
Observe the notes in the "Changing a wheel"
sec ...