I've got a block heater on my 300 cat. Don't you have one?
It is a 110V heater with the switch on my bedroom wall. Anytime it gets to the low 50's I turn it on for about 3 or 4 hours, or longer, before starting the engine.
I think you can turn the key on, wait for the start light to go out, turn off the key and turn it on again. Wait for the light to extinguish and try starting. This will insure that the air preheater has done it's job.
I'm sure someone with more knowledge will jump in here to help.
Pete - Full Timing
2000 Country Coach Magna 40', CAT C10, #5892
2006 Jeep Liberty