I guess the system could be installed but whether the benefit would be worth the cost is another matter. As new, it is only sold in conjunction with the auto-dimming rear view and door mirrors. The rain sensor itself is part of the rear view mirror.

You can vary the intermittent wipe interval by the little switch on the face of the stalk, with the rain sensing wipers the same switch varies the sensitivity of the detector.

It seems strange that you are getting the warning message "Faulty rain sensor" if your car is not so fitted. Sounds obvious, but if you've got autodim mirrors, then you've got the rain sensor. Your dealer may be wrong.


--
Boxster S 3.4 06 Cobalt / Ocean Blue (Zuffenhausen collection)  BMW 123d M Sport 08 Le Mans Blue / Lemon