Had the same problem. (water) Very common to Meganes if you research it. Usually it will involve stripping the door down and disconnecting the modulator box connectors. Once done, spray with wd40 and use a hair dryer on the connector and the box to dry out. Re-seal using lots of tape, in fact I sealed the whole lot using bathroom sealant and tape. Has worked fine since.
Dave
December 2009
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