I have a problem that only rears up in certain conditions. If the weather is like today, when its damp, with bouts of very fine rain, the igniion turns on, everything electrical works, but the starter wont turn. It doesnt even attempt to spin, and there is n heavy clicking either when I use the keyless or the key. there is clicking from the relays, but nothing that sounds like a solonoid. At all other times, including heavy rain, the starter works fine, it doesnt sound laboured and never fails to start the engine. I have tried spraying both he under bonnet fuse boxes with electrical cleaner and i have tried swapping the relay on the drivers side that clicks when I turn the key to the start position. As soon as the car dries out, it starts again, so obviously water is getting in somewhere and causing a broken circuit. I think the starter motor is under a heat shield on the S600 but I cant see it from the top, so I dont know if the starter itself is wet. Idont think its a much of a muchness, it just needs to be sprayed and then sealed properly when its dry. But where? Any ideas?