Thanks guys, just picked up the gasket from a Mercedes dealer. Pretty thick, made of rubber.
Brian, what do you mean by professional gasket remover? Are you referring to something like the permatex remover John mentioned? I don't have a resurfacing stone of any kind, so I'll try a zip pad or steel wool.
Also, anything to watch out for when removing the oil cooler lines? I plan on pulling the oil pressure line out of the cabin rather than mess with the fitting on the filter stand, since I have read that it is rather delicate.