Incorrect fuel in your Mercedes B250? Diesel in your Petrol Mercedes?

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Mercedes Fuel Drain


Filling up with Diesel in a Petrol Mercedes is a very common problem. And its solution will depend on a few things. If perhaps you would like to know what to do to fix it then keep on reading.
Listed here are the most crucial variables to consider when figuring out whether or not to get a fuel drain:

  1. What level of Diesel have you put in to the Mercedes, bearing in mind that the fuel capacity of your Mercedes B250 is in most cases about 50 litres?
    1. A tiny amount of Diesel, something like 2.5 litres of Diesel in a Petrol B250 will usually not really be a big problem. Experience has proven to us that anything under 2.5 litres (close to 5% of the entire fuel tank capacity) is oftentimes able to be completely diluted by completely topping the rest of the tank with Petrol.
      It is quite uncommon to encounter a motor vehicle going through issues due to less than 5% wrong fuel contamination. Please remember it is rare - not impossible to encounter. You can get some vehicles that don't stand any level of contamination in the slightest.
    2. Anywhere between 2.5 and 5 litres of Diesel in the Mercedes (5 to 10%) is a 50/50 situation. Our working experience has revealed that as many people get away with this as all those who break down. Any time you are deciding upon whether or not to chance it and just fill it up consider that it is much like wagering it all on black - you will have a 50/50 possibility of it working.
    3. Anything in excess of 5 litres of Diesel in a Petrol B250 must as soon as possible be drained out because your likelihood of driving with this quantity of contamination is more than likely less than one in 50 - definitely huge odds.
  2. Put Diesel in a Petrol Mercedes and drove it: Have you noticed any performance issues as a result of putting the bad fuel in your B250? If you have, have it drained regardless of the quantity of Diesel or the contamination percentage. Continuing to run driving a vehicle that is already beginning to suffer from the consequences of fuel contamination will definitely be responsible for more and more damage affecting the fuel system components.
  3. Do you need security?
    In that case get it removed. No matter the contamination percentage, there is inevitably some amount of risk in connection with driving a Petrol vehicle on fuel contaminated with Diesel. Probable consequences of driving on the wrong fuel include the motor not starting, running lumpy, loss in power, degradation of the high-pressure pump, worn or bunged injectors, etc. These are a few of the most typical Diesel in Petrol symptoms, and should you notice any of them then stop driving and have it removed asap.

Avoid getting any unqualified so-and-so to attend your automobile. We are Mercedes experts and have got the accreditation and practical experience required to make certain you are back on the road with minimal hassle or worry.

Put Diesel in a Petrol Mercedes

Accidentally put Diesel in a Petrol Mercedes? Or perhaps even put contaminated fuel in your Mercedes B250?

Give us a call for Help & Guidance

Give us a call and receive straightforward advice and sensible help for your specific situation

We arrive and drain it

We can reach you to undertake the full contaminated fuel drain & flush there on scene

Once completed You Get Going Once again

Once we are done you will be able to get back on the road and get on with your trip

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain authorities in the UK, offering countrywide coverage, for Mercedes motorists especially. We predominantly deal with:

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

We are Mercedes specialists and have successfully drained hundreds of Petrol Mercedes vehicles. Whether it's at the roadside, on a petrol station forecourt, or even at home, we can get you going once again.

The Process

The process of draining Diesel from a Petrol car is essentially similar for virtually all vehicles. Needless to say it may differ to some extent as each brand has their particular different fuel system. Even so it still generally observes the following 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.

Get in Touch

Should you have any enquiries or require assistance please Contact Us!
We can get you going again.

24/7 Mercedes Helpline

0333 366 0103

Our Corporate Office

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

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