Incorrect fuel in your Mercedes CLS 250 CDI? Petrol in your Diesel Mercedes?

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Mercedes Fuel Drain


Filling Petrol in a Diesel Mercedes is a common mistake. And what you have to do about it hinges on several things. In the event that you want to find out what you need to do about it then keep reading.
Listed below are the main factors to take into consideration when determining whether to have a fuel drain:

  1. How much Petrol did you put in to the Mercedes, taking into consideration that the fuel capacity of the Mercedes CLS 250 CDI is most likely approximately 59 litres?
    1. A tiny amount of Petrol, as little as 2.95 litres of Petrol in a Diesel CLS 250 CDI will generally not really be a big problem. Experience has demonstrated to us that an amount under 2.95 litres (almost 5% of the whole fuel tank volume) is quite often capable of being completely diluted by means of totally filling the rest of the tank with Diesel.
      It is rather rare to come across a vehicle experiencing issues with under 5% wrong fuel contamination. Please remember it's unusual - in no way impossible to find. You can get a number of motor vehicles that don't stand any level of contamination in the slightest.
    2. Somewhere between 2.95 and 5.9 litres of Petrol in the Mercedes (from 5 to 10%) is more of a 50/50 scenario. Our experience has revealed that as many people get away with this as those who don't. Whenever you are deciding on whether to risk it and just fill it up bear in mind that it is exactly like gambling all of it on black - you have got a 50/50 possibility of it working.
    3. Anything in excess of 5.9 litres of Petrol in your Diesel CLS 250 CDI ought to straightaway be removed seeing that your likelihood of driving with this level of contamination is certainly below one in 50 - seriously big odds.
  2. Put Petrol in a Diesel Mercedes and drove it: Have you spotted any performance troubles after putting the bad fuel in your CLS 250 CDI? If that's the case, have it drained regardless of the volume of Petrol or even the contamination percentage. Still running a vehicle that is currently beginning to suffer from the effect of wrong fuel contamination can likely bring about progressively more damage affecting your fuel system components.
  3. Are you interested in security?
    You should get it emptied. Regardless of contamination ratio, there is invariably some extent of risk connected with driving a Diesel motor on fuel contaminated with Petrol. Possible final outcomes of driving on the incorrect fuel include things like the engine refusing to start, running unevenly, loss in power, degradation of the high-pressure pump, worn out or bunged injectors, and so on. These are some of the most frequently seen Petrol in Diesel warning signs, and should you notice any of them stop and have it removed as soon as possible.

Do not just get any jack-of-all-trades to try to drain your automobile. We are Mercedes experts and have the skills and expertise required to ensure you get back on the road with a minimum of hassle or trouble.

Put Petrol in a Diesel Mercedes

Unintentionally put Petrol in a Diesel Mercedes? Or possibly even put contaminated fuel in your Mercedes CLS 250 CDI?

Contact us for Help & Recommendations

Contact us and get genuine recommendations and sensible assistance for your specific circumstance

We come out and drain it

We can reach you to do the full fuel drain & flush right there on scene

All done & You Get Moving Again

Once 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 national coverage, for Mercedes motorists in particular. We primarily attend:

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

We are Mercedes specialists and have successfully drained thousands of Diesel Mercedes vehicles. Even if it's roadside, on a filling station forecourt, or even at home, we can get you moving again.

The Procedure

The process of removing Petrol from a Diesel vehicle is in essence exactly the same for a large number of motor vehicles. Naturally it does vary somewhat as each manufacturer has their particular fuel system. Nevertheless it still basically observes 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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Petrol in Diesel FAQs

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 case you have any enquiries or need some help please Call us!
We can get you moving 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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