Nope. Calibration on the M-pumps is done down below. If you're in that deep, do all 6. It'll take you maybe 20 minutes longer than doing just the 1. And it'll save you from having to do the other 5 as they start to leak (it's never just one).

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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!)