Bad fuel in a Mercedes ML 500? Diesel in a Petrol Mercedes?

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Mercedes Fuel Drain


Putting Diesel in a Petrol Mercedes is a fairly typical mistake to make. And what you need to do about it is based on various factors. If perhaps you would like to know what it is advisable to do about this then keep on reading.
Listed below are the main factors to take into account whenever deciding whether or not to have a fuel drain:

  1. Exactly how much Diesel have you put into the Mercedes, bearing in mind that the fuel capacity of your Mercedes ML 500 is in most cases about 83 litres?
    1. Hardly any Diesel, something like 4.15 litres of Diesel in a Petrol ML 500 will most of the time not be a significant problem. Experience has shown us that anything under 4.15 litres (which is about 5% of the fuel tank volume) is generally capable of being completely diluted by wholly topping the remainder of the tank with the right fuel.
      It is very rare to encounter a car experiencing issues with less than 5% incorrect fuel contamination. Bear in mind that it is very uncommon - certainly not impossible to encounter. There are actually some cars that don't endure any level of fuel contamination whatsoever.
    2. Anywhere between 4.15 and 8.3 litres of Diesel in the Mercedes (5 to 10%) is a 50/50 situation. Our experience has demonstrated that as many motorists get away with this as those people who break down. When deciding on whether to chance it and simply top it up recognise that it is the same as betting everything on black - you have a 50/50 possibility of it working.
    3. Anything more than 8.3 litres of Diesel in a Petrol ML 500 ought to promptly be removed because your probability of getting away with this amount of contamination is undoubtedly lower than one in 50 - truly long odds.
  2. Put some Diesel in a Petrol Mercedes and drove it: Have you seen any performance concerns as a result of putting the wrong fuel in your ML 500? In that case, have it emptied no matter the volume of Diesel or even the contamination percentage. Still driving a motor vehicle that is currently beginning to suffer from the effects of fuel contamination will typically result in increasing amounts of harm being caused to your fuel system parts.
  3. Do you need assurance?
    You should get it drained. Whatever the contamination ratio, there is invariably some extent of threat caused by operating a Petrol engine on Petrol contaminated with the incorrect fuel. Probable results of driving on the incorrect fuel include things like the engine refusing to start, running unevenly, lack of power, degradation of the high-pressure pump, worn or bunged injectors, and so on. These are some of the most typical Diesel in Petrol signs and symptoms, and should you detect any of them stop driving and get it removed right now.

Stay away from getting any jack-of-all-trades to attend your automobile. We are Mercedes experts and hold the skills and knowledge required to ensure you are back on the road with little hassle or trouble.

Put Diesel in a Petrol Mercedes

Accidentally put Diesel in a Petrol Mercedes? Or perhaps even put contaminated fuel in your Mercedes ML 500?

Call us for Help & Recommendations

Give us a call and obtain honest guidance and practical help for your precise situation

We come out and drain it

We would reach you to undertake the complete fuel removal & flush there on scene

All done & You Get Going Once again

When we have finished you will be able to get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain experts in the UK, having national service, for Mercedes motorists particularly. We mainly attend to:

  • Unleaded petrol in your Diesel Auto
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water fuel contamination

We are Mercedes specialists and have successfully drained thousands of Petrol Mercedes vehicles. Whether or not it is roadside, on a petrol station forecourt, or even at your home, we can get you going again.

The Process

The method of removing Diesel from a Petrol car is fundamentally the same for the majority of vehicles. Naturally it does vary to some degree as every make has their unique fuel system. However it still basically follows the below points:

Petrol in Diesel Mercedes

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Mercedes

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Mercedes

Vehicle Restart

Get the car up and running again

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Diesel in Petrol FAQs

When someone has put Diesel in a Petrol car they have a few very common questions. So we have compiled a list of the most Frequently Asked Questions for you

I put Diesel in a Petrol car and drove it. What do I do?


Turn off the car as soon as possible and call us. Continuing to run a vehicle on the wrong fuel can potentially damage it. We will be able to give you advice and assistance based on your circumstances

Will driving a Petrol car on Diesel cause damage to it?


It can. However, if the problem is caught and remedied quickly the risks will be minimal. Of the 1,500 vehicles we attend every month, less than 0.5% have suffered and substantial damage requiring parts replacement.

How much Diesel can I get away with in a Petrol car?


The safe answer is none. However you might be able to get away with a very low contamination ratio. That being said, we always highly recommend draining anything over a 5% contamination ratio asap.

I know about petrol in diesel, but what about Super Unleaded?


Putting Super Unleaded, or Shell V-Power, BP Ultimate Unleaded, etc, will have the exact same effect as putting regular unleaded petrol in your diesel car and will need to be drained out and flushed.

Will getting you to do a fuel drain void my warranty?


No! The EU Block Exemption Regulations clearly state that "the work can be carried out by as long as that garage uses manufacturer approved parts and correctly follows the manufacturer's service schedule."

Can I top it up with Petrol and add some 2-stroke oil?


This might work on some vehicles in some cases, but in the majority on instances it won't and you risk damaging the Lambda sensors as well as fuel pump and injectors, just as a regular misfuel.

Call us

If you have any enquiries or want help please Call us!
We can get you moving once again.

24/7 Mercedes Helpline

0333 366 0103

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Fuel Fixer Ltd, Linx House, 147 London Road, East Grinstead, RH19 1ET

Weekdays: 9am to 5pm

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