C63newdude

I would like to know if anyone converted their C63 to E-85 or if the car is capable of running E-85 without tune(Like newer GM and Ford cars). I am reading some reviews on edmunds with people with C300 running E-85.

http://www.edmunds.com/mercedesbenz/...eview.5...html

I can truly imagine a huge benefit of running E-85 on our high compression ratio engines. In Brasil the Goverment has a patented designed of a electronic device called Flex-tek ( http://www.flextek.com/)
If you have any information on this I would love to hear from you.

yooker

You have to also consider that E-85 will significantly decrease your fuel economy because it packs less energy per volume compared to regular gasoline even though it has a higher octane..

Most-Wanted

E85 is amazing but it is no easy task. You will need way more fuel(injectors, pump, and tune). I just made over 800 whp in my evo with it. But I maxed out 1600cc injectors and was running a $900 Weldon 2035 fuel pump. I really needed 8 1600cc injectors instead of the standard 4. I cant even imagine the injector size that the C63 would need In short, yes you will definitely need a tune and much more....