Umruestung v70 2.5T Mod 98 to e85 -what kind of…

Now with the fish, the SuFu did not give anything in my eyes! What has to be done to make a V70 2.5T Mod 98 E85 suitable. So far only latent, not satisfactory information. Injection valves here, additional electronics there, any mixes there…. altogether no comprehensive details! Does it work at all? Can you still drive normal fuel after conversion, or is only 85s recommended…. what’s going on? What’s the point? What’s the problem? What’s the problem? do you have to accept yourself? What are the costs? etc