Mercedes-Benz 2008 M-Class Operator's Manual page 62

If windshield wipers fail to function at all in the
combination switch position U or V,
set the combination switch to the next
higher wiper speed
have the windshield wipers checked at the
nearest authorized Mercedes-Benz Light
Truck Center
Switching on windshield wipers
Turn the combination switch to the
desired position depending on the
intensity of the rain.
M Windshield wipers off
U Slow intermittent wiping
Rain sensor operation with low
sensitivity.
V Fast intermittent wiping
Rain sensor operation with high
sensitivity.
u Slow continuous wiping
t Fast continuous wiping
Intermittent wiping
Only switch on intermittent wiping under
wet weather conditions or in the presence
of precipitation.
When you select intermittent wiping, the
rain sensor is activated. The rain sensor
automatically sets a suitable wiping
interval depending on the wetness of the
sensor surface.
!
Do not leave windshield wipers on an inter-
mittent setting when the vehicle is taken to an
automatic car wash or during windshield clean-
ing. Wipers will operate in the presence of water
sprayed on the windshield, and windshield
wipers may be damaged as a result.
!
If you have set intermittent wiping, dirt on
the surface of the rain sensor or optical effects
may cause the windshield wipers to wipe in an
undesired fashion. This could then damage the
windshield wiper blades or scratch the windows.
You should therefore switch off the windshield
wipers when weather conditions are dry.
Turn the combination switch to
position U or V.
Getting started
After the initial wipe, pauses between
wipes are automatically controlled by the
rain sensor.
i
Intermittent wiping is interrupted when the
vehicle is at a standstill and a front door is
opened. This protects persons getting into or out
of the vehicle from being sprayed.
Intermittent wiping will be continued when all
doors are closed and
the automatic transmission is set to
position D or R
or
the wiper setting is changed using the
combination switch
Single wipe
Press the combination switch briefly in
direction of arrow 1 to the resistance
point.
The windshield wipers wipe one time
without washer fluid.
Driving
61