First time possible owner Don't know a thing about this flex Fuel shold I used only E85 or premium unleaded

Asked by May 21, 2015 at 04:31 PM about the 2014 Mercedes-Benz E-Class E350 Coupe

Question type: General

Looking at E350 2014  with flex fuel never heard of this.  I understand what it means but worry about more maintenance for using lesser than premium gas.  Give me your experience or suggestion?

1 Answer

7,985

E-85 just means it will run on an 15% Ethanol mixture. It IS NOT a requirement. Your car will run just fine on any good quality Mid-Grade gasoline. Some states have only "up to" 10% Ethanol. To bad you can not find Ethanol free gas in many areas. Your car will love it - but it is usually very overpriced. Even high performance engines such as in the 550's will run fine on good quality Mid-Grade. Try to stick with Tier 1 gs whenever possible.

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