Problems with the occupant classification system
WARNING
If the 
indicator lamp
illuminates and remains illuminated when the weight of a typical
adult or someone larger than a small individual has been detected on the
passenger seat, do not
allow any occupant to use the passenger seat until the system has been repaired.
WARNING
If the indicator lamp does not
illuminate or remains out with the weight of a typical
12-month-old child in a standard child restraint or less, or is unoccupied, on
the front-passenger
seat, do not transport a child on the front-passenger seat until the system has
been repaired.
See also:
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"
...
Vehicle
Display messages
Possible causes/consequences and
Solutions
You have attempted to start the engine with the transmission in
position R or D.
Shift the transmissio ...
Brake fluid level
If you notice that the brake fluid level in
the brake fluid reservoir has fallen to the
MIN mark or less, check the brake system
immediately for leaks. Also check the
thickness of the brake li ...