I am thinking about buying the AMG version. I would like to know if they have any known major problems, or somethings I should look for? They seem to be a great deal, I guess people did not want to spend the money for them new and they never really sold well, but that is just a guess on my part. Mid 20's for a three year old all wheel drive, 342 horsepower motor, and all the other goodies, and the amazing ML looks and I can't see any reason to not buy one! Any responses is greatly appreaciated. I am new to MB. thanks Jody