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.
•► Consult a qualified specialist workshop.
See also:
Important safety notes
Have the batteries changed at a qualified
specialist workshop.
WARNING
Batteries contain toxic substances.
Swallowing batteries can lead to serious
health issues or death.
Keep batteries o ...
Fuse box in the engine compartment
► Open the hood.
Illustrated: GL 450 (GL 350 BlueTEC, GL 550 are
similar)
► Remove any existing moisture from the
fuse box using a dry cloth.
► To open: open clamps 2.
` ...
Ashtray in the rear-compartment centerconsole
Close the ashtray when it is not in use and
before you fold the rear seats forward. You
can otherwise damage the ashtray.
► To open: briefly press marking 2.
Ashtray 2 opens.
► ...