Confused! V70 (Type24) Bi-fuel, flexi-fuel? Vulnerabilities / recommendations?

Hello together. I have a change of vehicle in the next 6-12 months. Actually it was clear that there was a 5s again on the 5s, but honestly I am not really convinced of the F10, so we are looking for alternatives. I also came up with Volvo, more precisely on the V70. A little research with Dr. Google has shown that there is the V70 of course with petrol engines and diesels, but also as a flexi fuel for E85. According to Wikipedia there is no longer a Bi-Fuel version for the Type24. Now I have found on mobile.de but various vehicles with Bi-Fuel. Click me. So I would like the car very much. Low fuel costs and sufficient power without the disadvantages of a diesel. But supposedly there is no such thing as the car, and I could not find any tests or driving reports on the motorization anywhere. Are the vehicles converted by the dealer, or did they have to be a Bi-Fuel factory after all? What do you have to pay attention to the engine?