What type of fuel does the Mercedes 300E use?

that car was available with a gas or diesel engine, I'm assuming you mean what grade of fuel in recommended for the gas engine. It is recommended to use the highest octane, it will run better and smoother, as well as improving your gas mileage and improving power.I tried low grade fuel ( 86 ) one time and immediately felt the power loss and heard pinging.If you love your car, give it what it deserves for all it's hard work and it will continue to work for you for years to come.