Is it any cylinder in particular? Any pinging or knocking? Is this on D2 or Bio? Bio should be a bit quieter.

I hear the reman Bosch injectors aren't often up to par...

__________________
1982 240D, sold 9/17/2008
1987 300D TurboW124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009
262,715 and counting