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 linings. Contact a
qualified specialist workshop, e.g. an
authorized Mercedes-Benz Center
immediately.
Do not add brake fluid. This does not
correct the error.
Only check the brake fluid level when the vehicle is stationary and on a level surface.

The brake fluid level is correct if it is between MIN marking 2 and MAX marking 1 on the brake fluid reservoir.
See also:
2008 Mercedes-Benz S-Class Review
When a car costs as much as a house, as the Mercedes-Benz S-Class does, it
makes you take a step back. Can a car this expensive really be worth it? After
spending a week with an S550, I can tell y ...
Driving with summer tires
Observe the notes in the "Winter operation"
section. ...
Mounting dimensions
WARNING
Only have a trailer tow hitch retrofitted at a
qualified specialist workshop which has the
necessary specialist knowledge and tools to
carry out the work required. Mercedes-Benz
reco ...
