can you put regular unleaded fuel in them?

Asked by LeahVanD23 Apr 16, 2010 at 11:43 AM about the 1990 Mercedes-Benz 300-Class 4 Dr 300E Sedan

Question type: General

I was just wondering if it's ok to put regular unleaded fuel in them? It's says premium fuel only on the gauges.  

3 Answers
195

Stuart answered 14 years ago

noooooo. all gasoline mercedes require premium fuel. regular fuel will damage it.

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17,065

Chase answered 14 years ago

no. pre-detonation will occur throwing the firing of each cylinder off. you will lose significant power and engine efficiency. the loss of efficiency will cost you more in gas than putting the right grade of fuel in.

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