I previously owned a 2000 ML class, its the worst car i think i have ever had. But i decided to give Mercedes another shot. I bought this new GLK class being a little hesitant at first, criticizing every little flaw. I ended up buying it and I don't regret it one bit. Best car i have driven in ages.
I know exactly where you're coming from; we've had 2000 ML 320 as well, and have had countless problems and expensive visits to the repair shop, and just this past winter a plethora of new rattles and noises seemed to emerge out of nowhere.