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:
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
cloths w ...
Interior
The simplistic but perfectly usable space inside the GLK350 quietly and
confidently transported me with my children in tow. It was equally intrepid
during a rare single mom's night on the town.
...
Safety systems
Problem
Possible causes/consequences and
Solutions
(USA only)
(Canada only)
The red brake system warning lamp comes on while the
engine is running. A warning to ...
