DSG, Haldex and rear differential oil, Superb 2.0 TSI 4x4 mk3

I'm changing the Haldex oil on my mk3 Superb. I got G 060 175 A2 for the Haldex and I'm not sure of the rear diff oil viscosity. 75W85? Do I need new fill/drain plugs for the Haldex or anywhere else? The DSG oil drain plug washer must be exchanged too, any info on the correct size? First oil changes for me on this one, so no clue for these and the "service manual" as they claim it to be has zero info (what do you know)...