2000 323 electrical; no start, following dying
Following weeks of no-problem frigid starts, the E46 started, got me five miles, then died: Upon trying to restart, I was greeted with a "CLACK-CLACK-CLACK"; all of the while lights dimming as the pulsing ensued. It wasn't anything like a smooth turnover, nor the quiet fast-clicking of usual dead battery. I even popped in another known good battery, no change.
Ok, so then I toss jumpers on, just in case I am wrong about the battery...no difference. It's as if there is a large power/contactor-relay (ie. feeding the "bendix" on the starter motor) that was being engaged/disengaged. Think "pulsing the engine" to move to T.D.C., back when we used to set ignition timing - but the key is fully maintained in start. I could sure use some troubleshooting ideas on this one.
I am at a loss, fearing brain-box / disabler / ???. My last Bimmer was a much simpler 1985 325is - so this fifteen year newer one has me stumped!