Mersedes SUV Manuals


Mercedes-Benz G-Class / Mercedes-Benz G-Class Owners Manual / Technical data / Service products and filling capacities / Fuel

Important safety notes

Fuel is highly flammable. If you handle fuel incorrectly, there is a risk of fire and explosion.

You must avoid fire, naked flames, creating sparks and smoking. Switch off the engine and, if applicable, the auxiliary heating before refueling.

Fuel is poisonous and hazardous to health.

There is a risk of injury.

You must make sure that fuel does not come into contact with your skin, eyes or clothing and that it is not swallowed. Do not inhale fuel vapors. Keep fuel away from children.

If you or others come into contact with fuel, observe the following:
Х Wash away fuel from skin immediately using soap and water.

Х If fuel comes into contact with your eyes, immediately rinse them thoroughly with clean water. Seek medical assistance without delay.

Х If fuel is swallowed, seek medical assistance without delay. Do not induce vomiting.

Х Immediately change out of clothing which has come into contact with fuel.

Tank capacity

Gasoline (EN 228)

Gasoline (EN 228)

Fuel grade

Do not use diesel to refuel vehicles with a gasoline engine. Even small amounts of the wrong fuel result in damage to the fuel system and engine.

You should only refuel with unleaded premium-grade gasoline as this avoids damaging the catalytic converter.

If engine running problems are apparent, have the cause checked immediately and repaired. Excess unburned fuel can otherwise enter the catalytic converter, leading to overheating and possibly causing a fire.

To ensure the longevity and full performance of the engine, only premiumgrade unleaded gasoline may be used.

If there is no premium-grade unleaded gasoline available and regular unleaded gasoline must be used, please observe the following precautions:
Х only fill the fuel tank to half full with regular unleaded gasoline and fill the rest with premium-grade unleaded gasoline as soon as possible.

Х do not drive at the maximum speed.

Х avoid sudden acceleration.

Х if the vehicle is carrying a light load, e.g.

two passengers without luggage, do not allow the engine to rev above 3000 rpm.

Х if the vehicle is fully loaded or is being operated in mountainous terrain, do not depress the accelerator pedal further than Ô of the pedal travel.

Use a filter when refueling from a fuel can.

Otherwise, the fuel lines and/or injection system could be blocked by particles from the fuel can.

Only refuel using premium-grade unleaded gasoline with a minimum octane rating of 91.

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

The concentration of additives in the fuel, however, must not exceed 10%, e.g.: Х Ethanol Х TAME Х ETBE Х IPA Х 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, may be used.

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

You will usually find information about the fuel grade on the pump. If you cannot find the label on the pump, ask the staff for assistance.

For further information, consult an authorized Mercedes-Benz Center or on the Internet at (USA only).

Information on refueling .

AMG vehicles

Only refuel using super-grade unleaded gasoline with at least 98 RON/88 MON that conforms to European standard EN 228 or an equivalent specification.

You could otherwise impair engine output or damage the engine.

Premium-grade unleaded gasoline with an octane rating of 95 RON/85 MON may be used as a temporary measure if the recommended fuel is not available. This may reduce engine performance and increase fuel consumption. Do not drive at full throttle.

Regular unleaded gasoline with an octane rating of 91 RON/82.5 MON may also be used as an emergency measure if the recommended fuel is not available.

Doing so results in noticeably higher fuel consumption, and the engine power output is noticeably reduced. Avoid driving at full throttle.

If only regular unleaded gasoline with an octane rating of 91 RON/82.5 MON or lower is available, you must have the vehicle adapted to this fuel at a qualified specialist workshop.


Do not refuel with low-grade fuel and do not use fuel additives that are not tested and approved for Mercedes-Benz vehicles.

Damage to or malfunctions of the fuel system may otherwise occur.

One of the main problems of poor fuel quality is the forming of deposits that are created during the gasoline combustion process.

Mercedes-Benz recommends that you use branded fuels that have additives.

If you use fuels without these additives over a longer period of time, carbon deposits may build up. These deposits form at the inlet valves and in the combustion chamber in particular.

This could lead to engine problems, e.g.: Х longer engine warm-up phase Х uneven idle Х engine noise Х misfiring Х loss of power

Carbon deposits may form if the availability of gasoline with relevant additives is insufficient (in certain regions). In this case, Mercedes-Benz recommends additives approved for use in Mercedes-Benz vehicles; see

For a list of approved products, consult an authorized Mercedes-Benz Center. Comply with the instructions for use on the product label.

Do not mix other fuel additives with fuel. This causes unnecessary costs and could damage the engine.

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