Contaminated fuel in a Mercedes C250? Diesel in a Petrol Mercedes?

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Mercedes Fuel Drain


Filling Diesel in a Petrol Mercedes is a regularly occurring problem. And what you need to do about it varies according to an assortment of factors. Assuming you would like to find out what you must do to sort it out then continue reading.
These are the key factors to be aware of when deciding on whether to have a fuel drain:

  1. Exactly how much Diesel did you put in to the Mercedes, considering that the fuel capacity of the Mercedes C250 is usually around 66 litres?
    1. A modest amount of Diesel, something like 3.3 litres of Diesel in a Petrol C250 will usually not really be a huge problem. Experience has shown us that an amount less than 3.3 litres (which is close to 5% of the entire fuel tank capacity) is often capable of being completely diluted by wholly filling the remainder of the tank with Petrol.
      It's quite rare to come across a car or truck having problems because of less than 5% wrong fuel contamination. Keep in mind that it is infrequent - definitely not impossible to find. There are actually a few cars that don't endure any level of contamination whatsoever.
    2. In between 3.3 and 6.6 litres of Diesel in the Mercedes (5 to 10%) is really a 50/50 condition. Our experience has confirmed that as many drivers get away with it as all those who break down. Whenever you are trying to decide whether to chance it and just simply fill it up consider that it is much like wagering all of it on black - you have got a 50/50 chance of it being ok.
    3. Anything in excess of 6.6 litres of Diesel in a Petrol C250 ought to right away be drained out as your likelihood of getting away with this quantity of contamination is more than likely lower than one in fifty - genuinely big odds.
  2. Put Diesel in a Petrol Mercedes and drove it: Have you seen any kind of performance difficulties since putting the incorrect fuel in your C250? If so, get it drained irrespective of the volume of Diesel or even the contamination ratio. Continually running a motor vehicle that is starting to suffer from the effects of wrong fuel contamination will likely result in more and more damage affecting the fuel system.
  3. Do you want peace of mind?
    You should get it emptied. Regardless of contamination ratio, there is invariably some extent of danger caused by driving a Petrol engine on Petrol contaminated with Diesel. Probable outcomes of driving a vehicle on the wrong fuel normally include the engine refusing to start, running unevenly, reduced power, wearing of the high-pressure pump, damaged or blocked injectors, and so on. These are a few of the most frequently seen Diesel in Petrol signs and symptoms, and should you recognise any of them then cease driving and have it drained as soon as possible.

Don't just have any unqualified mechanic to attend your vehicle. We are Mercedes specialists and have the credentials and experience needed to make certain that you are back on the road with minimal hassle or trouble.

Put Diesel in a Petrol Mercedes

By mistake put Diesel in a Petrol Mercedes? Or perhaps even put contaminated fuel in your Mercedes C250?

Give us a call for Help & Advice

Give us a call and receive reliable advice and practical help for your particular circumstances

We come out and do a fuel drain

We can come to you to carry out the complete fuel drain & flush right there on scene

Once done You Get Going Again

As soon as we have finished you should be able to get back moving and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain specialists in the UK, boasting nationwide coverage, for Mercedes motorists in particular. We mainly attend:

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

We are Mercedes specialists and have successfully drained thousands of Petrol Mercedes vehicles. Even if it is at the roadside, on a filling station forecourt, or even at your house, we are able to get you on the road again.

The Procedure

The method of draining Diesel from a Petrol vehicle is generally similar for virtually all vehicles. Needless to say it does differ somewhat as every manufacturer has their particular different fuel system. However it still essentially follows 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.

Call us

If you have any concerns or require our help please Call us!
We can get you moving again.

24/7 Mercedes Helpline

0333 366 0103

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

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