The sensor is mounted on the front bumper. There is Reset function on the associated knob, explained on page 98 of the manual.
This indicator displays the outside
temperature in Centigrade.
The temperature sensor is located in
the front bumper. Therefore, the
temperature reading can be affected
by heat reflection from the road surface,
engine heat, and the exhaust
from surrounding traffic. This can
cause an incorrect temperature reading
when your speed is under
30 km/h (19 mph).
When you start your trip, the sensor
is not fully acclimatized, therefore it
may take several minutes until the
proper temperature is displayed.
If the outside temperature is
incorrectly displayed, you can adjust
it up to 3°C warmer or cooler.
NOTE: The temperature must be
stabilized before doing this
procedure.
Press the Select/Reset knob for 10
seconds. The following sequence will
appear for one second each: 0, 1, 2, 3,
-3, -2, -1, 0.
When it reaches the desired value,
release the Select/Reset knob. You
should see the new outside
temperature displayed.
In certain weather conditions,
temperature readings near freezing
0°C could mean that ice is forming
on the road surface.
Hope this helps.