I see the edmunds boys bought a used one also to do a long term test on. I hope your ABC is not going out like theirs did. Great car but its maintenance cost are high but you did said its not a DD so you should be fine.

However, the engine seems to be bulletproof its just the suspension like on the other MB's that has the active suspension set up. The guy who is long testing theirs even said he is thinking about buying it for himself after the test because he just loves it.

2005 Mercedes-Benz CL65 AMG Long-Term Road Test - Maintenance