type of gas

If the manual states a requirement for premium fuel, or it says so on the gas door, then the engine requires the higher octane fuel to prevent preignition and subsequent engine damage. Don't be cheap with a Benz, repairs are high on German cars in general and MBZ is no exception. Gas is cheap compared to Benz repairs.. If you want to use regular gas anyway, get a Benz specialist to explain the consequences to you. If you want to find a specialist, here's a directory link for you: https://repairpal.com/mercedes-benz-repair-in-drayton-south-carolina

just stick to premium, good for the engine. no offense, if u cant afford premium gasoline, then a benz is not for u..