Incorrect fuel in a Mercedes E300 CDI? Petrol in a Diesel Mercedes?

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Mercedes Fuel Drain


Filling Petrol in a Diesel Mercedes is a very common error. And exactly what you need to do about it varies according to various things. If you would like to know what to do about this then keep on reading.
Let us discuss the key variables to consider whenever making a decision whether to get the car drained:

  1. What amount of Petrol have you put into the Mercedes, keeping in mind that the fuel capacity of your Mercedes E300 CDI is in most cases roughly 80 litres?
    1. A small quantity of Petrol, something like 4 litres of Petrol in a Diesel E300 CDI will more often than not not be a big problem. Experience has demonstrated to us that an amount less than 4 litres (almost 5% of the overall fuel tank volume) is oftentimes able to be sufficiently diluted by means of totally topping the remainder of the tank with the right fuel.
      It is relatively unusual to encounter a motor vehicle experiencing problems because of less than 5% incorrect fuel contamination. Keep in mind that it's uncommon - certainly not impossible to encounter. There are a few automobiles that will not endure any amount of fuel contamination at all.
    2. Anywhere between 4 and 8 litres of Petrol in the Mercedes (5 to 10%) is more of a 50/50 condition. Our experience has shown us that as many drivers get away with it as those people who break down. When you are figuring out whether or not to chance it and basically fill it up consider that it is just like betting your car on black - you will have a 50/50 possibility of it being ok.
    3. Anything over 8 litres of Petrol in your Diesel E300 CDI should immediately be drained out seeing as your likelihood of succeeding with that level of contamination is probably below one in 50 - definitely huge odds.
  2. Put some Petrol in a Diesel Mercedes and drove it: Have you detected any kind of performance issues ever since putting the bad fuel in your E300 CDI? If you have, have it drained regardless of the volume of Petrol or even the contamination ratio. Still running a car that is now beginning to suffer the effect of wrong fuel contamination can typically end up in more and more harm being caused to the fuel system parts.
  3. Would you like reassurance?
    Simply get it emptied. Regardless of contamination percentage, there is inevitably some amount of risk resulting from running a Diesel vehicle on fuel contaminated with Petrol. Likely results of driving on the incorrect fuel normally include the motor not starting, running lumpy, decrease in power, wearing of the high-pressure pump, worn or bunged injectors, and so on. These are some of the commonest Petrol in Diesel warning signs, and in the event that you detect any of them then stop and get it removed as soon as possible.

Don't simply get any unqualified mechanic to attend your automobile. We are Mercedes specialists and possess the qualifications and experience needed to ensure you get back on the road with a minimum of hassle or worry.

Put Petrol in a Diesel Mercedes

Inadvertently put Petrol in a Diesel Mercedes? Or perhaps even put contaminated fuel in your Mercedes E300 CDI?

Contact us for Assistance & Advice

Call us and obtain straightforward advice and practical help for your specific circumstances

We come out and do the fuel drain

We would come to you to perform the complete contaminated fuel drain & clean there on scene

Once carried out You Get Moving Again

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

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain authorities in the UK, offering nationwide cover, for Mercedes motorists in particular. We principally fix:

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

We are Mercedes specialists and have successfully drained hundreds of Diesel Mercedes vehicles. No matter if it is roadside, on a filling station forecourt, or even at your home, we are able to get you on the road again.

The Procedure

The method of removing Petrol from a Diesel car is in essence the same for virtually all vehicles. As you can imagine it may vary a bit as each make has their own different fuel system. However it still fundamentally 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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Petrol in Diesel Questions

When someone has put Petrol in a Diesel car they have a few very common questions. So we have compiled a list of the most Frequently Asked Questions for you

I put Petrol in a Diesel 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 Diesel car on Petrol 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 Petrol can I get away with in a Diesel 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 Diesel 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

In the event that you have any queries or want our help please Contact Us!
We are able to get you moving 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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