My 240D suddenly has developed an intermittent current drain. Battery tests fine under load, alternator charging to 14.5V at battery. Ammeter registers 0.01MA at battery with only clock running, but spiked one time. I heard a click when re-connecting the Neg battery cable which sounded like the glowplug relay. Disassembled the relay, no corrosion. I could not duplicate the spike. Can the ignition switch be causing this intermittent problem? Thanks for any help in diagnosing the problem.

John

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Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI

I suppose it's possible, but I would eliminate your non-OEM alternative fuel system first.
Try unhooking it for a few days and see if the problem goes away.

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'83 300D Turrrbo 295K miles