No. If it is working and not leaking why open up the hydraulic system for no reason? You can remove the slave cyl from the transmission to prevent any difficulties in bleeding the system when you reassemble. It's not like you have to pull the tranny if you need to replace it later.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine