<p>A driver assistance system for a vehicle which has a mirror unit (1) fixed thereto in a position such that a driver of the vehicle looking into the mirror unit (1) is provided with a view outside of the vehicle comprising a projector (14) adapted to project an image onto the surface of the mirror (12), the image being visible to the driver when looking into the mirror (12), the image overlaying the view seen by the driver in the mirror (12) thereby to assist the driver in identifying salient features within the view visible in the mirror (12).</p>
