Fuel requirements

Use only premium-grade unleaded gasoline.

The octane number should be at least 91.

Details can be found on the gas pump. The octane number is the average value of the Research Octane Number (RON) and the Motor Octane Number (MON): (RON + MON) / 2, also known as knock resistance.

Reformulated gasoline (RFG) and/or unleaded gasoline with additives can be used.

However, the concentration of additives in the fuel must be less than 10%, e.g.
• Ethanol
• TAME
• ETBE
• IPA
• TBA

For MTBE, the concentration should not exceed 15%.

The concentration of methanol in gasoline including other additives must not exceed 3%.

Using mixtures of methanol and ethanol is not permitted. Gasohol, a mixture of 10% ethanol and 90% unleaded gasoline, can be used.

All of these mix fuels must fulfill the fuel requirements, e.g.:
• knock resistance
• boiling point
• vapor pressure

    See also:

    EBD (electronic brake force distribution)
    Observe the "Important safety notes" section. EBD monitors and controls the brake pressure on the rear wheels to improve driving stability while braking. WARNING If EBD has mal ...

    Replacing the windshield wiper blades
    Removing the wiper blades Before changing the wiper blades, always set the wiper arms to a vertical position using the combination switch. There is otherwise a risk of damaging the hood. Moving ...

    Going & Stopping
    A 268-horsepower, 3.5-liter V-6 is standard. The engine moves the GLK350 rapidly when you want, and the seven-speed automatic transmission consistently shifts smoothly no matter if you're driving ...