Hello, for a few weeks have a used S80 (BJ 1999) with a great equipment. Only the rain sensor is missing. From my last rental car I was very spoiled by the comfort of an existing rain sensor (except for the rain sensor in the Renault, which was scrap), in the current weather situation (continuously changing light precipitation) you have to constantly huddle without rain sensor at the windscreen wiper. Especially during long highway rides this is annoying. Therefore my question: how well does the rain sensor work ? – is it worth retrofitting (is that at all ?) ?