Bad fuel in your Mercedes B220 CDI? Petrol in a Diesel Mercedes?

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Mercedes Fuel Drain


Putting Petrol in a Diesel Mercedes is a very common mistake. And what you should do about it depends upon a variety of factors. If perhaps you want to find out what it is advisable to do to fix it then read on.
Listed here the key factors to be aware of when making a decision whether to have a fuel drain:

  1. Exactly how much Petrol have you put into the Mercedes, bearing in mind that the fuel capacity of the Mercedes B220 CDI is most likely about 50 litres?
    1. A small amount of Petrol, something like 2.5 litres of Petrol in a Diesel B220 CDI will quite often not necessarily be a big problem. Experience has shown us that quantities less than 2.5 litres (approximately 5% of the overall fuel tank) is in many instances capable of being completely diluted by means of wholly topping the tank with Diesel.
      It is very unusual to encounter an automobile experiencing problems with less than 5% incorrect fuel contamination. Be aware that it's unusual - certainly not impossible to find. You will discover certain automobiles that won't endure any amount of contamination whatsoever.
    2. Anywhere between 2.5 and 5 litres of Petrol in the Mercedes (from 5 to 10%) is more of a 50/50 scenario. Our working experience has demonstrated that as many drivers get away with it as those who break down. Whenever deciding whether or not to risk it and basically top it up consider that it is the same thing as gambling everything on black - you've got a 50/50 chance of it being ok.
    3. Anything more than 5 litres of Petrol in a Diesel B220 CDI should really right away be drained since your probability of driving with this level of contamination is undoubtedly lower than one in fifty - seriously huge odds.
  2. Put Petrol in a Diesel Mercedes and drove it: Have you spotted any kind of performance issues as a result of putting the bad fuel in the B220 CDI? If you have, get it emptied no matter the amount of Petrol or the contamination ratio. Continually driving a motor vehicle that is currently starting to suffer the consequences of fuel contamination will probably only result in even more harm being done to your fuel system parts.
  3. Would you like assurance?
    Simply get it emptied. Whatever the contamination ratio, there is invariably some extent of risk connected with running a Diesel motor on Diesel contaminated with Petrol. Possible final outcomes of driving a car on the incorrect fuel can include the engine not starting, running unevenly, decrease in power, degradation of the high-pressure pump, damaged or bunged injectors, and the like. These are some of the most common Petrol in Diesel signs and symptoms, and should you detect any of them cease driving and have it removed as soon as possible.

Don't simply get any jack-of-all-trades to attend your car. We are Mercedes experts and hold the credentials and working experience needed to make certain that you get back on the road with minimal hassle or worry.

Put Petrol in a Diesel Mercedes

Accidentally put Petrol in a Diesel Mercedes? Or possibly even put contaminated fuel in your Mercedes B220 CDI?

Give us a call for Help & Recommendations

Give us a call and receive sincere guidance and sensible assistance for your specific circumstances

We come out and do a fuel drain

We are able to reach you to undertake the complete contaminated fuel drain & flush right there on scene

All done & You Get Going Once again

When we are done 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, having national cover, for Mercedes motorists especially. We mainly attend to:

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

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

The Procedure

The procedure of draining Petrol from a Diesel car is in essence similar for most motor vehicles. Needless to say it does vary to some extent as each brand has their unique different fuel system. However it still generally adheres to 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.

Get in Touch

In the event that you have any questions or want some help please Contact Us!
We can get you going 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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