Well, I ambled down to a friendly mechanic this morn and tried to work with him on the difficult starting, no glow plug light problem using information I read here. Here is the problem: No glow plug light (although once or twice it was intermittent). Very hard starting (it is 20F here!). Block heater makes starting a breeze.

So I check the plugs: They were all drawing proper current.

So I put in a new relay. Tested the plugs - two of them were now not drawing current. I replaced all 5 plugs.

Plugs now draw current. Glow plug light lights. And the car starts.

(Will it start tomorrow when I leave at 5:30AM? Was the problem really the plugs?..or should I have kept the new relay?...)