Mercedes-Benz 2007 E -Class Wagon Operator's Manual page 261

Controls in detail
Driving systems
The most likely cause for a malfunctioning
system is a dirty sensor (located behind
the hood grille), especially at times of snow
and ice or heavy rain. In such a case,
Distronic will switch off, and the message
DISTRONIC
currently unavailable
See Operator's Manual
appears in the multifunction display.
For cleaning and care of the Distronic sen-
sor, see "Cleaning the Distronic* system
sensor cover" ( page 372).
i
If the message
DISTRONIC
currently unavailable
See Operator's Manual
disappears during driving and the last speed
stored flashes for approximately 5 seconds, the
dirt (e.g. slush) has dissolved; Distronic works
again.
260
Turns and bends
In turns or bends, Distronic may not detect
a moving vehicle in front, or it may detect
one too soon. This may cause your vehicle
to brake late or unexpectedly.
Offset driving
A vehicle traveling in your lane but offset
from your direct line of travel may not be
detected by Distronic. There will be insuffi-
cient distance to the vehicle ahead.