I've had 11 240s, and of those only two have had leaks. The '89 had a leak above the fuse strip, my '92 has shown the exact same problem. I have been unable to duplicate the leak in either car at will, even leavin the cars in pouring rain is no garantee that it would leak. They were minor leaks, but even a minor leak in that location can seriously effect the fuse panel. One reason I only use the stainless-glass fuses now.

I never even drove the '92 in the rain for the first two years I had it. It hasn't leaked in a few years now though.

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'92 240 @45k & '96 960 @41k