1984 MB 300D
Now that the cold is finally here in Texas my 300D wont start. I figured it's the glow plugs since the light doesnt even come on at first but on second crank it comes on and goes out after only a few seconds. I pulled the glow plugs and the first 4 were varying degrees of oily and gunky while the last one was fine. So what's making them oily and will that cause them not to function?