18x8.5 offset 40

'02 C240

should be fine. i know for sure 45mm will not. but anyways, if you really want the rims get them and if need be, get spacers.

actually, as i've just read spacers may not be the greatest thing in the front. the rear should have no problem. but all in all, i think they will fit as stock offset is 37mm. personally, i think if you go with 225/40/18 tires, it should be fine.

thanks for the info =)