Huh0-60mph in less than 9 seconds is what I would call fast.

A 520d does 0-62 in 7.9 seconds, and the slowest C-Class they make - a C200 CDI with 136 HP - manages 0-62 in 9.1 seconds!!
It's actually quite difficult to find anything much slower than 9 seconds to 60 in the class you are interested in. In fact, you'd have to buy the bottom of the range engine in every case in order to stand a chance of not meeting that criteria!