I don't notice any slack, and there shouldn't be any since the Pitman arm is just returned to the original position when reinstalling the gearbox (there are reference marks that you just line up). The steering linkages and tie rods, etc. are not disturbed, so no need to re-align.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280