OK, there are just too many models. Someone I knew just bought a new Benz, we're walking to it and he says it's an AMG. I asked if it was an E55 (the only AMG I know) and he looked at me like I should have knows it was a C55 AMG. I guess I'm clueless. A quick breakdown of series would be great (and if it helps to relate it to BMWs classes, that's fine, I'm well versed in those product lines ).