Incorrect fuel in a Mercedes SLK 250 CDI? Petrol in your Diesel Mercedes?

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Mercedes Fuel Drain


Filling Petrol in a Diesel Mercedes is a fairly typical mistake. And exactly what you want to do about it is dependent upon a number of things. If perhaps you would like to know what you should do about it then keep reading.
Listed below are the most crucial factors to keep in mind whenever making a decision whether or not to get your car drained:

  1. What level of Petrol did you put into the Mercedes, taking into consideration that the fuel capacity of the Mercedes SLK 250 CDI is most likely around 60 litres?
    1. A small amount of Petrol, as little as 3 litres of Petrol in a Diesel SLK 250 CDI will in most cases not necessarily be a major problem. Experience has shown us that quantities under 3 litres (which is roughly 5% of the whole fuel tank) is often capable of being adequately diluted simply by totally topping the remainder of the tank with the correct fuel.
      It's pretty unusual to find a motor vehicle experiencing issues with less than 5% incorrect fuel contamination. Keep in mind that it's rare - certainly not impossible to encounter. There are actually a few vehicles that don't endure any level of contamination in the slightest.
    2. Between 3 and 6 litres of Petrol in the Mercedes (from 5 to 10%) is more of a 50/50 situation. Our expertise has demonstrated that as many drivers get away with this as all those who break down. When deciding upon whether or not to chance it and basically top it up recognise that it is exactly like gambling everything on black - you have got a 50/50 chance of it working out.
    3. Anything over 6 litres of Petrol in a Diesel SLK 250 CDI ought to promptly be removed since your likelihood of getting away with that quantity of contamination is probably less than one in 50 - extremely long odds.
  2. Put Petrol in a Diesel Mercedes and drove it: Have you spotted any kind of performance concerns ever since putting the incorrect fuel in your SLK 250 CDI? In that case, get it emptied regardless of the quantity of Petrol or even the contamination percentage. Continually driving a car that is beginning to suffer the effects of wrong fuel contamination will typically cause even more harm affecting the fuel system parts.
  3. Are you interested in security?
    Then simply just get it drained. Regardless of the contamination ratio, there is invariably some amount of risk caused by running a Diesel motor on Diesel contaminated with Petrol. Possible consequences of driving a car on the incorrect fuel normally include the engine refusing to start, running unevenly, loss in power, degradation of the high-pressure pump, damaged or blocked injectors, and the like. These are some of the commonest Petrol in Diesel warning signs, and should you detect any of them then stop and get it drained asap.

Do not simply have any jack-of-all-trades to try to drain your car. We are Mercedes specialists and have the accreditation and practical experience necessary to make certain you are back on the road with no hassle or trouble.

Put Petrol in a Diesel Mercedes

Inadvertently put Petrol in a Diesel Mercedes? Or possibly even put contaminated fuel in your Mercedes SLK 250 CDI?

Call us for Help & Advice

Contact us and obtain honest advice and practical help for your exact situation

We come out and do a fuel drain

We would go to you to perform the complete contaminated fuel removal & flush right there on scene

All done & You Get Moving Once again

Once we have completed you should be able to get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain experts in the UK, boasting countrywide coverage, for Mercedes motorists especially. We typically attend:

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

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

The Procedure

The method of getting rid of Petrol from a Diesel car is generally identical for the majority of motor vehicles. Obviously it can differ a bit as each manufacturer has their unique different fuel system. Even so it still generally follows the below 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.

Call us

In case you have any queries or want our help please Contact Us!
We are able to get you moving once 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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