that tells you the plugs are working. wait the full 30 seconds before attempting to start the car, you will be rewarded with instantaneous starts in the coldest NC temps!
I am a little further south, and a bit more west... Gaston co. but I have not had any problems with my 300K+ miles MB's
John

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!