Incorrect fuel in a Mercedes C300? Diesel in a Petrol Mercedes?

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Mercedes Fuel Drain


Filling Diesel in a Petrol Mercedes is a usual error. And exactly what you have to do about it is determined by a number of things. If perhaps you would like to find out what you ought to do to sort it out then stay with me.
Listed below are the most crucial factors to be aware of when making a decision whether to get it drained:

  1. What level of Diesel did you put in the Mercedes, taking into account that the fuel capacity of your Mercedes C300 is in most cases approximately 66 litres?
    1. Hardly any Diesel, less than 3.3 litres of Diesel in a Petrol C300 will generally not be a major problem. Experience has proven to us that anything less than 3.3 litres (5% of the entire fuel tank volume) is very often capable of being adequately diluted through completely filling up the rest of the tank with the correct fuel.
      It is extremely rare to come across a car or truck going through problems because of below 5% incorrect fuel contamination. Be aware that it's unusual - definitely not impossible to find. You will discover a few cars that will not stand any level of contamination at all.
    2. Somewhere between 3.3 and 6.6 litres of Diesel in the Mercedes (from 5 to 10%) is more of a 50/50 scenario. Our working experience has demonstrated that as many people get away with it as all those who don't. Whenever you are figuring out whether to chance it and simply top it up recognise that it is much like gambling your car on black - you have got a 50/50 possibility of it working out.
    3. Anything over 6.6 litres of Diesel in your Petrol C300 must right away be drained seeing that your likelihood of driving with this quantity of contamination is more than likely less than one in 50 - definitely long odds.
  2. Put some Diesel in a Petrol Mercedes and drove it: Have you observed any performance concerns after putting the incorrect fuel in your C300? If so, have it drained no matter the amount of Diesel or the contamination percentage. Proceeding to run running a vehicle that is now beginning to suffer from the effects of fuel contamination can definitely result in progressively more damage being done to the fuel system components.
  3. Are you interested in peace of mind?
    You should get it emptied. Regardless of contamination percentage, there is invariably a certain level of danger affiliated with driving a Petrol vehicle on Petrol contaminated with Diesel. Likely outcomes of driving on the wrong fuel include things like the motor not starting, running unevenly, decrease in power, degradation of the high-pressure pump, damaged or bunged injectors, etc. These are some of the commonest Diesel in Petrol signs or symptoms, and in the event that you detect any of them then stop and get it drained right now.

Don't just have any general so-and-so to try to fix your automobile. We are Mercedes experts and hold the credentials and working experience necessary to make certain that you are back on the road with minimal hassle or worry.

Put Diesel in a Petrol Mercedes

Inadvertently put Diesel in a Petrol Mercedes? Or even put contaminated fuel in your Mercedes C300?

Contact us for Assistance & Advice

Contact us and receive honest guidance and practical help for your specific circumstance

We arrive and do a fuel drain

We are able to reach you to perform the complete fuel retrieval & purge right there on scene

All done & You Get Moving Once again

When we have completed you are able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain experts in the UK, having national service, for Mercedes motorists especially. We primarily fix:

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

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

The Procedure

The technique of getting rid of Diesel from a Petrol vehicle is essentially identical for virtually all vehicles. Obviously it may vary to some extent as every brand has their unique different fuel system. Having said that it still essentially observes the following principles:

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 questions or need help please Contact Us!
We can get you moving 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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