I was only speaking of my friends experiences with the CL65, which was an unpleasant experience for his wallet to say the least. Did they give him great service at the dealership?......you bet they did.....but it was thousands every time he had to go in for anything. It sounds like you get a new one every few years once they run out of warranty, so the exuberant maintenance costs would not apply to you. For the OP, going from maintenance costs on his Vette to the costs on the MB....there will be a significant difference, especially if he goes to an AMG badged car like the 65 series.