Mercedes-Benz 2005 E -Class Wagon Operator's Manual page 367

Practical hints
What to do if ...
Display Display message
Distronic Currently unavailable
See Operator's Manual
366
Possible cause
DISTRONIC* is switched off if:
the DISTRONIC cover in the area
of the radiator grille is dirty
the functionality is impaired by
heavy rain or thick fog
Possible solution
If necessary, clean the DISTRONIC cover in
the area of the radiator grille.
Restart the vehicle.
or
DISTRONIC* becomes operational again with-
out the engine being restarted when:
dirt on the grille falls off while driving (e.g.
slush or snow)
the system recognizes full sensor availabili-
ty (due to lessening rain or the road surface
drying)
the message in the multifunction display
disappears
the speed last stored flashes in the display
for five seconds.
You can operate DISTRONIC* as usual again.