Is it supposed to work every time I put the key in the ON position? I used to hear it when the engine is shut down. Not any more though, and I can't tell for how long.

I don't see any changes in the engine temp. Is it supposed to be ON all the time?

I will start with the fuse box. I saw a price of $160 for that little pump. Looks easy to change though.

Please, please don't kill me, but I have'nt changed the coolant at 99K miles and 7 tears assuming it should not be a problem in FL, I will change it now. I know MB coolant only, I read the threads.

Thanks,

Rene

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'99 ML320, '00 C280