Problems with the cooling with air dehumidification function
When you press the 
button, the indicator
lamp in the button flashes three times or remains off. You can no longer switch
on the cooling with air dehumidification function.
X Consult a qualified specialist workshop.
See also:
Flexible fuel vehicles
Important safety notes
Flexible fuel vehicles can be recognized by
the sticker on the inside of the filler flap.
Flexible fuel vehicles can be operated with
premium-grade unleaded gasoline and
...
Vehicle data, GL 550
The data stated here refers specifically to a
vehicle with standard equipment. Consult an
authorized Mercedes-Benz Center for the
data for all vehicle variants and trim levels.
...
Overhead control panel
1 Switches the lefthand
reading lamp on/off
2 Switches the front
interior lighting on
3 Switches the rear
interior lighting on/off
4 Switches the front
interior lighting/automatic
i ...