It's not uncommon to have the DV's cause the nailing for a couple hundred miles after you do something to them. Give it a few hundred miles for everything to seat and see where you wind up. In the mean time, try a healthy dose of cetane boost and see if it shuts things up. You could have poor quality fuel.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]