Bad fuel in your Mercedes ML 400 CDI? Petrol in your Diesel Mercedes?

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Mercedes Fuel Drain


Filling up with Petrol in a Diesel Mercedes is a usual mistake to make. And its solution varies according to a few things. If you want to know what you should do about this then please read on.
Here are the most crucial factors to take into account whenever choosing whether to get your car drained:

  1. What level of Petrol have you put into the Mercedes, considering that the fuel capacity of the Mercedes ML 400 CDI is normally around 70 litres?
    1. A modest quantity of Petrol, less than 3.5 litres of Petrol in a Diesel ML 400 CDI will usually not really be a massive problem. Experience has proven to us that anything less than 3.5 litres (which is close to 5% of the total fuel tank) is sometimes capable of being sufficiently diluted simply by totally topping the remainder of the tank with the correct fuel.
      It's very uncommon to come across a motor vehicle having problems because of less than 5% incorrect fuel contamination. Keep in mind that it is rare - certainly not impossible to encounter. There are some vehicles that will not stand any quantity of fuel contamination at all.
    2. In between 3.5 and 7 litres of Petrol in the Mercedes (5 to 10%) is a 50/50 situation. Our expertise has shown that as many people get away with this as all those who don't. When you are figuring out whether or not to chance it and simply top it up recognise that it is exactly like betting all of it on black - you've got a 50/50 possibility of it being ok.
    3. Anything over 7 litres of Petrol in a Diesel ML 400 CDI should as soon as possible be drained out as your likelihood of succeeding with this amount of contamination is probably below one in 50 - extremely big odds.
  2. Put some Petrol in a Diesel Mercedes and drove it: Have you spotted any kind of performance concerns after putting the bad fuel in your ML 400 CDI? If you have, have it removed regardless of the amount of Petrol or the contamination ratio. Continually running a motor vehicle that is already starting to suffer the consequences of wrong fuel contamination will probably likely be responsible for even more damage affecting the fuel system.
  3. Are you interested in reassurance?
    Then simply just get it emptied. Regardless of contamination ratio, there is invariably some degree of danger associated with operating a Diesel vehicle on Diesel contaminated with Petrol. Likely implications of driving a vehicle on the wrong fuel can include the engine not starting, running unevenly, losing power, degradation of the high-pressure pump, worn or clogged injectors, and so on. These are a few of the most common Petrol in Diesel signs or symptoms, and should you notice any of them cease driving and have it drained right now.

Do not just get any jack-of-all-trades to attend your automobile. We are Mercedes experts and have got the skills and practical experience necessary to ensure you get back on the road with no hassle or trouble.

Put Petrol in a Diesel Mercedes

Mistakenly put Petrol in a Diesel Mercedes? Or possibly even put contaminated fuel in your Mercedes ML 400 CDI?

Give us a call for Help & Guidance

Give us a call and receive honest recommendations and sensible help for your exact circumstance

We come out and drain it

We would go to you to do the complete contaminated fuel retrieval & clean there on scene

All done & You Get Going Once again

Once we have finished you are able to get back moving and get on with your trip

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain experts in the UK, offering countrywide service, for Mercedes motorists particularly. We typically fix:

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

We are Mercedes specialists and have successfully drained thousands of Diesel Mercedes vehicles. Whether or not it's roadside, on a filling station forecourt, or even at home, we can get you going once again.

The Procedure

The process of extracting Petrol from a Diesel vehicle is essentially exactly the same for the vast majority of motor vehicles. Obviously it does vary to some degree as every manufacturer has their unique distinct fuel system. Even so it still essentially follows the below points:

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.

Contact Us

Should you have any enquiries or want our assistance please Contact Us!
We are able to get you on the road once again.

24/7 Mercedes Helpline

0333 366 0103

Our Business Office

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

Weekdays: 9am to 5pm

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