Okay all I am having some serious problems here. I can't seem to get the car I am trying to sell started. 1985 300D. I keep it plugged in but everytime I try to start it the starter just doesn't seem to want to turn (maybe block warmer not working). I have put a new battery in it and it tries a little harder but still nothing. I realize it has been super cold here over the last 2 weeks, and I haven't started it in about a month. But I need to sell this car. So any advice on what to do? Is the starter going bad or is it just too cold?