The other day I went out to start my 1980 300sd when I started it I noticed a rough idle and the glow plug light was flashing. It flashed about ten times and went out. Is this a bad glow plug? I am planning on picking up five new ones monday because I am going in for my 15000 mile valve adjustment. I think they are the original glow plugs. She now has 200,410 miles. Any info would be appreciated. Also I need to know how hard they are to remove. Are they going to be stuck tight or will they come out easy?
Thanks to all