Wrong fuel in a Mercedes A140? Diesel in a Petrol Mercedes?

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Mercedes Fuel Drain


Filling up with Diesel in a Petrol Mercedes is a well-known mistake. And its remedy depends upon a variety of things. In the event that you would like to find out what you have to do about it then keep reading.
Listed below are the key factors to take into consideration whenever making a decision whether or not to have it drained:

  1. Exactly how much Diesel did you put in the Mercedes, bearing in mind that the fuel tank capacity of your Mercedes A140 is most likely approximately 54 litres?
    1. A tiny quantity of Diesel, something like 2.7 litres of Diesel in a Petrol A140 will in most cases not necessarily be a major problem. Experience has demonstrated to us that quantities under 2.7 litres (which is about 5% of the entire fuel tank volume) is often able to be completely diluted by wholly filling up the rest of the tank with the correct fuel.
      It is pretty unusual to encounter a car experiencing issues due to less than 5% incorrect fuel contamination. Keep in mind that it's rare - not impossible to encounter. You can get some vehicles that won't stand any level of contamination whatsoever.
    2. Anywhere between 2.7 and 5.4 litres of Diesel in the Mercedes (from 5 to 10%) is a 50/50 scenario. Our working experience has shown that as many drivers get away with this as all those who don't. Whenever figuring out whether to risk it and basically fill it up bear in mind that it is just like wagering it all on black - you have got a 50/50 chance of it being ok.
    3. Anything above 5.4 litres of Diesel in a Petrol A140 should really promptly be drained since your probability of succeeding with this amount of contamination is probably lower than one in 50 - extremely huge odds.
  2. Put Diesel in a Petrol Mercedes and drove it: Have you spotted any performance issues as a result of putting the wrong fuel in the A140? In that case, get it removed irrespective of the amount of Diesel or even the contamination ratio. Still running an automobile that is already beginning to suffer the effect of wrong fuel contamination can likely cause increasing amounts of damage being done to the fuel system parts.
  3. Do you need security?
    Then simply just get it emptied. No matter the contamination ratio, there is always a certain level of threat resulting from running a Petrol engine on fuel contaminated with Diesel. Possible results of driving on the incorrect fuel include the engine not starting, running unevenly, lack of power, wearing of the high-pressure pump, damaged or clogged injectors, and so on. These are a few of the most common Diesel in Petrol signs or symptoms, and should you detect any of them then stop and get it removed right away.

Stay away from having any jack-of-all-trades to attend your vehicle. We are Mercedes specialists and hold the qualifications and experience required to make certain that you are back on the road with minimal hassle or worry.

Put Diesel in a Petrol Mercedes

By mistake put Diesel in a Petrol Mercedes? Or even put contaminated fuel in your Mercedes A140?

Call us for Assistance & Recommendations

Contact us and get honest guidance and sensible help for your particular circumstance

We come out and do the fuel drain

We would reach you to do the complete fuel drain & clean right there on scene

All done & You Get Moving Again

Once we have finished you can get back moving and get on with your trip

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, offering nationwide coverage, for Mercedes motorists in particular. We mostly attend to:

  • Unleaded petrol in Diesel Car
  • Diesel in your Unleaded Petrol Car
  • AdBlue contamination
  • Water fuel contamination

We are Mercedes specialists and have successfully drained hundreds of Petrol Mercedes vehicles. Regardless of whether it is roadside, on a petrol station forecourt, or even at home, we can get you on the road again.

The Process

The process of removing Diesel from a Petrol car is generally exactly the same for most vehicle makes. Of course it does vary a bit as each manufacturer has their particular distinct fuel system. Even so it still fundamentally observes the following guidelines:

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 Questions

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.

Contact Us

In the event that you have any enquiries or require our assistance please Contact Us!
We can get you moving once again.

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0333 366 0103

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


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