I have a 1998 GTI 2.0, and since about 40K anytime when driving during a heavy downpour, or snow, it cuts out, runs rough, and sometimes trips the check engine light. The light clears itself after a few hundread miles. It does this in the summer as well as the winter. My local dealer suggested about $3500 worth of work, basically replacing every electrical componet in the car. I think its a much simpler problem, like a wire with broken insulation.. Any ideas?