Mercedes-Benz S 450 4MATIC Operator's Manual page 705

Practical hints
What to do if ...?
Display
Shift to P
Check
Washer Fluid
704
Possible cause/consequence
You have attempted to turn off the engine
with the KEYLESS-GO* start/stop button
and opened the driver's door with the auto-
matic transmission not shift to park
position P.
You are driving with the trunk open.
The water level has dropped to approx.
1.1 US qts (1.0 l).
Possible solution
Shift the automatic transmission to park
position P ( page 426).
or
Close the driver's door.
Close the trunk ( page 512).
Add washer fluid ( page 580).