I have a 2001 E320 4matic Wagon. The only problem I have experienced is that during heavy rain storms water has leaked out of the SOS switch.

The first time I brought it in MB claimed that the sunroof drains were clogged, and that I shouldn't park it outside with the sunroof open. I never leave the roof open, but since it had been outside, I accepted this.

Of course, the garage was cleaned out and the car has never stayed out since that last repair. But this past week we had torrential rain storms here in the East. While running errands, the same thing happened again.

Before I bring the car back to MB, since I don't believe their diagostician, has anyone experienced this and what is the cause/solution?

Thanks... eric