I'd replace those rotors due to the heavy rust. Thickness is one thing, but rust is another. I have had 2 rotors crack in the circumference around the hub, and in both cases my wife was driving the car. Stepped on brake = loud crack noise, caliper held rotor but rotor separated from hub, so car kept going. Definitely not safe.

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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