Quote Originally Posted by BMWCCA1
One difference between the BMW BluePerformance and M-B's Bluetec might be this:
I though the point of BlueTec (vs. just CDI) was to lower emissions (for California and the likes), but I DO now recall that the requirements were either toughened or there was some problem (maybe why BlueTec isn't being expanded to other models quickly, just a guess). So BMW did it better? The only E60 I would consider buying is a 535d if that comes to the US (probably not til next generation though). I had one for a bit over the summer and loved it.