Ah, someone reminded me tonight that you're supposed to cross the test leads first, then subtract whatever reading comes up from the test reading? That was missing from my extensive (cough) knowledge in this area.

Mine reads .3 across the leads, so therefore the four plugs actually measured about .8 ohms.

Yes, the harness was unplugged.

Question: I understand this test is supposed to be done on 'cold' plugs. The plugs were cold, as in not having been activated that day, but the block heater was plugged in. Would the slight amount of heat reaching the GPs alter the readings?

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

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