I have a 1996 520H. I replaced the charging regulator about a month ago and has ran fine until this week. I have replaced the relays also, but not with genuine replacment parts. The wiring harness is a bit of a mess as someone has moved 2 of the fuses from the crap fuse holder. I let it set for a week, and no spark! turns over fine, one relay kicks in on run, another on start, cant tell about the third. The coil doesnt show any physical damage, however the new regulator is already cracking a little. oh, and the oil light is blinking. seems odd that no spark after sitting, even though everything else brakes after you turn it off. Im not sure where to start?