Hi Jsea,
My Tiguan came with the same white waxy stuff along the bottom edge of parts of the sills on both sides. Looks to be anti-corrosion wax which is injected as a liquid during manufacture, and then the excess oozes out of the lower water drain holes in the sills, and also the doors. Maybe our warmer weather softens or melts it a bit so it oozes out for a few weeks from newly delivered vehicles.
I wiped the excess off my car with kerosene on a clean rag, but be careful to first wash/brush off with water & detergent any dirt/grit stuck in the wax, as best you can, to avoid scratching the sills when wiping with the kero.
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