No. Once you pull the speedo out of the cluster, the plastic bearing housing is right on the side opposite the gear train. If you're taking the time to go that far in, make sure your gears are good. So far the O-ring is holding up, still keeping accurate mileage.

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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]