[B]changing the oil on my 95 C280[/B]

I just bought the car and I'm already breaking parts on in. When trying to change the oil today, I somehow cracked the cap of the oil filter housing, when trying to get it off, which I never did.
Can anyone tell me if mercedes makes some kind of special tool to get this off. A regular oil filter wrench don't work, because fo where it's located, and there's no way it's coming off with just my hands.
Oh yea, how much trouble am I going to have finding this part? There's no driving the car without a new one, once it builds up presure, well lets just say it's embarasing to drive with that much smoke coming from my car.

In need of some good advice
Thanks