Rain Sensor and Sunroof

[eppy]

I just purchased a 2002 E430 4MATIC and very happy with it.

With all of the things that are incorporated into this car I find it curious that the rain sensor does not close the windows and sunroof when it rains. Can the car be modified to do this? I know that if you point the keyless remote at the car while holding the lock button everything closes. So everything is there to do it. How hard would it be to do?

Thanks,

Pete