Until now, I have either been to my regular petrol station to fill up with bio-ethanol, or I have had a list of places that it is available at on my PDA.
But this week I discovered that there is a E85 POI (point of interest) overlay for TomTom navigation kits.
I downloaded and installed it using the TomTom HOME software, and sure enough: I can now ask it to find me a petrol station selling bio-ethanol anywhere in Germany. I hope that the file is kept up-to-date as more places start selling it, and when I next travel further away I’ll be sure to try it out!