Contaminated fuel in a Mercedes C320 CDI? Petrol in a Diesel Mercedes?

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Mercedes Fuel Drain


Filling Petrol in a Diesel Mercedes is a common error. And its solution is determined by an assortment of things. Assuming you would like to know what you must do about it then continue reading.
These are the most crucial factors to be aware of when deciding on whether to have a fuel drain:

  1. How much Petrol have you put into the Mercedes, taking into account that the fuel capacity of the Mercedes C320 CDI is normally approximately 62 litres?
    1. Hardly any Petrol, less than 3.1 litres of Petrol in a Diesel C320 CDI will more often than not not be a significant problem. Experience has taught us that anything less than 3.1 litres (almost 5% of the whole fuel tank volume) is oftentimes able to be sufficiently diluted simply by thoroughly filling up the tank with Diesel.
      It's relatively unusual to encounter a motor vehicle experiencing difficulties with lower than 5% incorrect fuel contamination. Be aware that it is very unusual - definitely not impossible to encounter. There are actually a number of motor vehicles that will not endure any degree of fuel contamination in the slightest.
    2. Between 3.1 and 6.2 litres of Petrol in the Mercedes (from 5 to 10%) is really a 50/50 condition. Our working experience has confirmed that as many motorists get away with it as all those who don't. Any time you're trying to decide whether or not to risk it and just top it up remember that it is much like gambling all of it on black - you've got a 50/50 chance of it being ok.
    3. Anything more than 6.2 litres of Petrol in a Diesel C320 CDI really should straightaway be drained out because your probability of succeeding with that amount of contamination is almost certainly lower than one in fifty - truly big odds.
  2. Put Petrol in a Diesel Mercedes and drove it: Have you seen any performance concerns ever since putting the bad fuel in your C320 CDI? If so, get it removed irrespective of the volume of Petrol or even the contamination percentage. Continuing to drive running a motor vehicle that is now beginning to suffer the effect of wrong fuel contamination will likely be responsible for more and more harm being done to the fuel system parts.
  3. Are you looking for security?
    You should get it removed. Whatever the contamination ratio, there is always some extent of danger resulting from driving a Diesel vehicle on Diesel contaminated with the incorrect fuel. Possible implications of driving on the wrong fuel normally include the engine not starting, running lumpy, reduced power, wearing of the high-pressure pump, worn or bunged injectors, and the like. These are a few of the most common Petrol in Diesel signs and symptoms, and should you detect any of them then stop and have it drained asap.

Keep away from getting any jack-of-all-trades to attend your automobile. We are Mercedes experts and have the accreditation and working experience needed to ensure you are back on the road with minimal hassle or trouble.

Put Petrol in a Diesel Mercedes

Mistakenly put Petrol in a Diesel Mercedes? Or perhaps even put contaminated fuel in your Mercedes C320 CDI?

Give us a call for Assistance & Guidance

Give us a call and get genuine recommendations and sensible assistance for your particular circumstance

We come out and do a fuel drain

We can go to you to perform the full fuel removal & flush right there on scene

All done & You Get Moving Again

Once we are done you can get back on the road and get on with your trip

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain authorities in the UK, having countrywide service, for Mercedes motorists in particular. We primarily attend to:

  • Unleaded petrol in Diesel Auto
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water contamination

We are Mercedes specialists and have successfully drained hundreds of Diesel Mercedes vehicles. Regardless of whether it is roadside, on a station forecourt, or even at your house, we are able to get you on the road again.

The Process

The process of getting rid of Petrol from a Diesel car is fundamentally exactly the same for most vehicles. Needless to say it can vary to some extent as every brand has their own fuel system. However it still fundamentally observes 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.

Get in Touch

In the event that you have any queries or require some help please Contact Us!
We can get you going once again.

24 hour 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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