The DV's need to "wear in" after they've been disturbed. The sealing faces won't be perfectly mated. Several operations (tens of thousands) are needed to wear the faces in. It isn't the washer that wears in, it's the faces of the DV itself. The period of time needed for them to wear in may have some mild nailing, but won't cause skipping at idle. The noise will die down typically in 100-1000 miles. If swapping the DV's didn't cure the skip/wobble/miss, be looking for another issue, probably valves not sealing properly due to wear or worn guides.

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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]