Improper toe will accelerate wear far more than improper caster or camber. FWD can be harder to nail because toe changes dynamically during acceleration and braking. However, the specs are supposed to account for that. There may be more than permissible play somewhere amongst all the steering components.

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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