Button under wing mirror

EXCF350

Junior Member
Messages
177
While checking the door seals I noticed a button under the drivers wing mirror. I can't find reference to it in the manual so does anyone know what it is?
 

BL330

Member
Messages
1,123
Concur as I've replaced mine whilst chasing down an air cond/ interior fan fault.
It didn't turn out to be the sensor at fault, but was part of the process of elimination.
So, yes it's definitely the outside air temp sensor.