I just put four on my 300CD, got them from Phil at Fast Lane, they may have been a couple of bucks more but it was time to pay my dues. The new ones were upside down compared to the old ones. I called Phil and he e-mailed a drawing of the OEM shocks, and the ones he sent were correct. He was truley concerned and was anxious to help.
The new shocks gave me a NEW CAR! I've had them on for about a month now, and still can't wait each morning to get that baby on the road! Theres really strong cross winds at each end of my 75 mile commute, I could hardly keep it on the road when going into and coming out of the cuts. Now its steady as a rock.
There may be something out there as good as the Bilsteins, but for my money, I'll hang tight with "The real thing"
Ernie