Warning and indicator lamps in the instrument cluster
See also:
Mercedes-Benz M-Class Owners Manual
...
Speed rating
The speed rating is part of the tire
identification. It specifies the speed range for
which the tire is approved. ...
The first 1000 miles (1500 km)
The more you look after the engine when it is new, the more satisfied you will
be with its performance in the future.
Drive at varying vehicle speeds and engine speeds for the first 1000 miles
...