Coil pack harness trouble need help..?

[tigerv8@gmail.c]

I'd like to know a few things about the wiring harness that goes to the coil packs. I have a 1995 C280. The rubber molding that's inside the spark plug cover is cracked in a few places and I think that's been my trouble of misfiring and rough idling. Has anyone ever replaced one of these? and does anyone know the offical name of this part? thanks in advance.