OK so I have spent the day checking it out, (my new to me 2004 sprinter) and oddly enough all seems to be working (except the central heat, it too hot to get it to turn on at the moment) anyways I rea...
I leave the anode rod out of my water heater when I drain it, but put a breathable plug in there to keep the bugs out. But that's just me, other people may do it differently.