Well, its good to know... I will keep this in mind when changing the plugs in my 88' 300SEL (which I think it needs - it has a slight and occasional sputter at idle). They are so hard to get to you know. J/K. I have never seen plugs to easy to get to. All that concerns me is that I hate changing plugs on a car with aluminum heads. I am always afraid they will get stuck or something and I will ruin the head.