I recently did a change with this new fluid on my E300D. So far so good, and the performance is at least as good as it was with the old fluid, which I believe was the older Mobil1 ATF. Personally I'm not worried about this new ATF and the change might just be a labeling change. The new, post 2005 transmissions apparently require a thinner fluid which might not be the best choice for our older transmissions. I checked the specs on the fluid in question and they're virtually identical to those of Red Line D4. I'm not worried. BTW, I thought Dexron VI was a synthetic too as it wouldn't make much sense for GM to recommend a non-synthetic for "better performance".

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL