The original..... like OEM plugs with nothing but the Benz logo on them are still installed in the 181k mile 3.2 I pulled out of my V8 car.

I pulled a few of them out a few weeks ago and it took quite the effort. Even with the effort, I really didn't expect them to be the factory plugs because the engine ran so good.

I would really twist on them, but your car is not my car.

Good luck.

Jared