PLease pass the Guiness to my friend Tighed1, as that was BRILLANT! I never even thought about that. I could due to CAI with the Mercedes air box that Anthony of TVT has advertised when I take it in for factory maintence and they would never know. Do you think that if I would due to TVT 250/265 and modify the computer that techs would know or just think it was peppy? I want to modify but I also want to be able to keep the warranty if at all possible.