Bad fuel in a Mercedes CL55 AMG? Diesel in a Petrol Mercedes?

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Mercedes Fuel Drain


Putting Diesel in a Petrol Mercedes is a fairly typical mistake. And what you have to do about it will depend on several different factors. If you would like to find out what you need to do about this then keep on reading.
These are the most important variables to take into consideration whenever deciding on whether or not to have it drained:

  1. Exactly how much Diesel did you put in the Mercedes, bearing in mind that the fuel capacity of your Mercedes CL55 AMG is normally about 88 litres?
    1. A small quantity of Diesel, as little as 4.4 litres of Diesel in a Petrol CL55 AMG will most of the time not really be a major problem. Experience has shown us that anything under 4.4 litres (which is roughly 5% of the whole fuel tank capacity) is frequently capable of being sufficiently diluted by wholly topping the rest of the tank with the right fuel.
      It is relatively rare to find a car suffering from problems due to less than 5% wrong fuel contamination. Keep in mind that it is very uncommon - definitely not impossible to find. There are actually a number of motor vehicles that won't endure any level of contamination in the slightest.
    2. Between 4.4 and 8.8 litres of Diesel in the Mercedes (5 to 10%) is really a 50/50 situation. Our experience demonstrates that as many motorists get away with this as those people who break down. Whenever you are deciding upon whether to risk it and simply top it up recognise that it is very much like gambling everything on black - you've got a 50/50 chance of it working.
    3. Anything in excess of 8.8 litres of Diesel in your Petrol CL55 AMG really should promptly be removed since your likelihood of driving with that amount of contamination is probably less than one in fifty - seriously big odds.
  2. Put Diesel in a Petrol Mercedes and drove it: Have you observed any kind of performance difficulties ever since putting the bad fuel in the CL55 AMG? If you have, have it drained irrespective of the quantity of Diesel or even the contamination ratio. Continually running a vehicle that is now starting to suffer from the effect of fuel contamination will probably just cause even more harm affecting the fuel system parts.
  3. Are you looking for assurance?
    Then get it drained. Regardless of contamination percentage, there is always some amount of risk caused by running a Petrol engine on Petrol contaminated with Diesel. Possible consequences of driving a vehicle on the incorrect fuel can include the engine not starting, running unevenly, decrease in power, degradation of the high-pressure pump, damaged or blocked injectors, and so forth. These are several of the most typical Diesel in Petrol warning signs, and should you detect any of them then stop driving and have it drained as soon as possible.

Steer clear of getting any jack-of-all-trades to try to fix your vehicle. We are Mercedes experts and have the qualifications and practical experience required to ensure you are back on the road with no hassle or worry.

Put Diesel in a Petrol Mercedes

Mistakenly put Diesel in a Petrol Mercedes? Or possibly even put contaminated fuel in your Mercedes CL55 AMG?

Give us a call for Assistance & Guidance

Contact us and get honest advice and practical assistance for your specific circumstance

We show up and do the fuel drain

We would reach you to undertake the contaminated fuel drain & purge there on scene

Once carried out You Get Moving Once again

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

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain experts in the UK, boasting nationwide coverage, for Mercedes motorists especially. We mostly attend:

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

We are Mercedes specialists and have successfully drained hundreds of Petrol Mercedes vehicles. Whether it is roadside, on a station forecourt, or even at your home, we are able to get you going again.

The Process

The process of draining Diesel from a Petrol car is basically identical for most cars. Naturally it may vary somewhat as every brand has their own distinct fuel system. Even so it still essentially follows the below 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 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

In case you have any enquiries or want help please Contact Us!
We are able to get you on the road again.

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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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