I measured the resistance at the glow plug relay which all measure around 1.3-4 ohms. Correcting for a 0.3 ohm reading from the wires by themselves yields around 1 ohms resistance for the glow plugs. No glow plug was out of range. I had recently replaced my radiator last week and today i noticed that there was light splattering of coolant near the upper hose. I realized that I had forgotten to tighten the screw clamp on the upper hose. I refilled the reservoir and realized that I was down almost a gallon of mix. So perhaps being low on coolant and affected the ability to start on cold mornings. The car is parked outside in my driveway. I'll see tomorrow if it starts more easily with the added coolant. Note that being low on coolanr did not have an adverse (higher) affect on the operating temp. I will adjust the valves this weekend.

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85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)