Sensor unit for detecting the wetting of a window

A method for detecting interior and exterior wetting of a window, said method comprising the following steps:

• detecting interior wetting of the window by a first sensor positioned on an interior surface of the window;
• and
• detecting, almost simultaneously, exterior wetting of the window by a second sensor positioned on the interior surface of the window,
• whereby an evaluation unit receives signals from said first sensor and said second sensor, makes an evaluation and outputs an output, dependent on the evaluation.

A sensor unit being mounted to a first surface of a window, the sensor unit comprising:

• a condensation sensor for detecting wetting of the first surface;
• and
• a rain sensor for detecting wetting of a second surface of a window,
• wherein the first surface and the second surface of the window are substantially parallel to one another.