A wind deflector assembly includes a wind deflector member which extends in a transverse direction of the vehicle and is movable between a retracted position and an extended position. The wind deflector member is connected to a first end of at least one pivotable wind deflector arm of which an opposite second end is at least pivotally connected to a stationary part. A biasing device engages the wind deflector arm and urges the wind deflector arm towards the extended position. The biasing device is at least pivotally connected to the stationary part through a pivot.