Set timing to 0˚TDC, then continue to rotate to 14-15˚ATDC (Actual amount is marked on a sticker on the radiator cross member). Line up the timing mark in the window behind the 17mm plug on the side of the injection pump, insert the locking pin tool and tighten down. Insert the IP and secure it.

Forget about timing it if you don't have the locking tool. If you have the locking tool from eBay, use a file to widen the notch a bit and make it deeper. The notch they come with is marginal and can let the timing slip (ask me how I know...)

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

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