I'd be interested, as well. The instrument panel plastic in Audis is notorious for scratching if you breath on it. I'd like to find something to clean mine up by hand.
After looking around a bit, it appears that M17 is a 2-step product used with M10. Megs also has a 1-step product called PlastX that is supposed to be similar, but perhaps not as refined.
If you're looking to just clean plastic, I think you'd use M10 alone. To remove fine scratches, start with M17 and then polish with M10.