You didn't mention how long the car sat. You may be replacing the injectors and injection pump. WVO doesn't lend itself to engine longevity, especially when parked or neglected. If it sat long enough, it's turned to glue and everything in the injection pump will be junk.

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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!)