Pulling up to the pump and seeing 87, 89, and 91 listed side by side, most new owners end up asking the same thing: does Mercedes-Benz require premium gas? For nearly every gasoline model in the current lineup, yes, and the reasoning come down to performance, fuel efficiency, and long-term engine health. Mercedes-Benz of Orland Park walks new owners through this exact question on a regular basis.
The Octane Difference
Octane measures a fuel's resistance to premature combustion, or engine knock, making it especially important for the high-compression, turbocharged engines found throughout the Mercedes-Benz lineup.
Premium gasoline carries a higher octane rating, typically 91 or above, which resists knock far better than the 87-octane regular found at most pumps. Turbocharged four-cylinders and AMG® V8 engines are tuned around that higher resistance, so they hold their factory ignition timing instead of pulling it back. Holding that timing is what delivers the intended horsepower, torque, and acceleration feel.
What Happens If You Use Regular Instead
Fill the tank with regular instead, and the onboard computer compensates by retarding timing on its own, trading away some power and fuel economy. Using the recommended premium fuel helps the engine operate as designed while reducing the likelihood of repeated engine knock that can place additional stress on internal components over time. Skipping premium once in a while will not ruin an engine, but making a habit of it adds up.
Plug-In Hybrids and EVs Follow Different Rules
The premium requirement is not universal across the entire Mercedes-Benz range. Plug-in hybrid models still carry a gasoline engine under the hood, so premium fuel matters whenever that engine and its EQ Power® system are doing the work. Even if most of your daily driving is electric, a Mercedes-Benz plug-in hybrid still requires premium gasoline whenever its engine is running. Fully electric models remove the question entirely since there is no gasoline engine to fuel.
Learn More at Mercedes-Benz of Orland Park, Near Tinley Park, IL
For nearly every gasoline and plug-in hybrid Mercedes-Benz model, premium fuel helps deliver the performance, efficiency, and long-term reliability the vehicle was engineered to provide. The fuel door sticker or the owner's manual will confirm the exact octane rating for any specific model. Contact Mercedes-Benz of Orland Park for more information today.
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