Are you saying you removed the camshaft sprocket? If you did and you're retiming the engine from scratch, you need to get a copy of the FSM and follow it TO THE LETTER to set initial timing. In a diesel engine there isn't any room for error due to the extremely low clearances between piston and head/valves.

In the future, if you ever remove the camshaft use some zip ties to hold the timing chain to the camshaft sprocket. The camshaft is indexed to the sprocket with a dowel pin so when you go to reassemble everything will still be correctly timed.

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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]