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Lights and visibility
Rain sensor*
Fig. 143 Windscreen wiper lever: adjusting
the r
ain sen
sor
A
Fig. 144 Rain sensor sensitive surface
The rain sensor controls the frequency of the
w
ind
s
creen wiper intervals, depending on
the amount of rain ›››
. The sensitivity of the
r
ain sen
sor c
an be adjusted manually. Man-
ual wipe ››› page 137.
Move the lever to the required position
››› Fig. 143:
Rain sensor off.
Rain sensor on; automatic wipe if neces-
sary.
Setting sensitivity level of rain sensor
–
Set control to the right: highly sensi-
tive.
–
Set control to the left: less sensitive.
When the ignition is switched off and then
back on, the rain sensor stays on and starts
operating again when the windscreen wipers
are in position
1
and the vehicle is travel-
lin
g at
mor
e than 4 km/h (2 mph).
Rain sensor modified behaviour
Possible causes of faults and mistaken read-
ings on the sensitive surface ››› Fig. 144 of
the rain sensor include:
●
Damaged blades: a film of water on the
damaged blades may lengthen the activation
time, reduce the washing intervals or result
in a fast and continuous wipe.
●
Insects: insects on the sensor may trigger
the windscreen wiper.
●
Salt on roads: in winter, salt spread in the
roads may cause an extra long wipe when the
windscreen is almost dry.
●
Dirt: dry dust, wax, coating on glass (Lotus
effect) or traces of detergent (car wash) may
0
1
A
reduce the effectiveness of the rain sensor or
m
ak
e it
react more slowly, later or not at all.
●
Cracked windscreen: the impact of a stone
will trigger a single wipe cycle with the rain
sensor on. Next the rain sensor detects the
reduction in the sensitive surface area and
adapts accordingly. The behaviour of the sen-
sor will vary with the size of the damage
caused by the stone.
WARNING
The rain sensor may not detect enough rain
to swit
ch on the wipers.
●
If necessary, switch on the wipers manually
when water on the windscreen obstructs visi-
bility.
Note
●
Cle
an the sensitive surface of the rain sen-
sor regularly and check the blades for dam-
age ››› Fig. 144 (arrow).
●
To remove wax and coatings, we recom-
mend a window cleaner containing alcohol.
139
Technical dataAdviceOperationEmergenciesSafety
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