Incorrect fuel in a Mercedes R320 CDI? Petrol in your Diesel Mercedes?

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Mercedes Fuel Drain


Filling Petrol in a Diesel Mercedes is a common mistake to make. And its remedy will depend on several factors. If perhaps you want to know what you ought to do about it then read on.
Right here are the main factors to be aware of when determining whether or not to have the car drained:

  1. How much Petrol did you put into the Mercedes, bearing in mind that the fuel capacity of the Mercedes R320 CDI is usually about 80 litres?
    1. A tiny amount of Petrol, something like 4 litres of Petrol in a Diesel R320 CDI will usually not be a major problem. Experience has proven to us that quantities less than 4 litres (approximately 5% of the fuel tank volume) is in many instances able to be sufficiently diluted by means of wholly filling up the rest of the tank with the appropriate fuel.
      It's extremely rare to come across a car going through issues due to below 5% wrong fuel contamination. Bear in mind that it is uncommon - in no way impossible to find. There are actually certain automobiles that won't stand any degree of contamination at all.
    2. Somewhere between 4 and 8 litres of Petrol in the Mercedes (from 5 to 10%) is more of a 50/50 scenario. Our expertise has shown us that as many motorists get away with this as those who don't. Any time you're deciding on whether or not to chance it and simply top it up consider that it is very much like betting all of it on black - you've got a 50/50 chance of it working out.
    3. Anything more than 8 litres of Petrol in your Diesel R320 CDI should straight away be drained out as your probability of driving with that level of contamination is in all likelihood below one in fifty - definitely long odds.
  2. Put some Petrol in a Diesel Mercedes and drove it: Have you seen any performance problems as a result of putting the wrong fuel in the R320 CDI? If you have, get it emptied no matter the quantity of Petrol or the contamination percentage. Continuing to drive driving a car that is already starting to suffer from the effects of wrong fuel contamination will probably likely bring about progressively more harm being caused to your fuel system.
  3. Would you like security?
    In that case get it removed. No matter the contamination ratio, there is always a certain level of threat linked with operating a Diesel vehicle on fuel contaminated with the incorrect fuel. Likely implications of driving on the wrong fuel normally include the motor not starting, running lumpy, reduced power, wearing of the high-pressure pump, worn or blocked injectors, etc. These are a few of the most typical Petrol in Diesel signs or symptoms, and if you notice any of them then stop driving and have it removed asap.

Stay away from getting any unqualified mechanic to attend your automobile. We are Mercedes specialists and have got the skills and knowledge required to ensure you get back on the road with no hassle or trouble.

Put Petrol in a Diesel Mercedes

Accidentally put Petrol in a Diesel Mercedes? Or possibly even put contaminated fuel in your Mercedes R320 CDI?

Give us a call for Assistance & Recommendations

Give us a call and get honest recommendations and practical help for your particular circumstances

We show up and drain it

We would reach you to carry out the complete contaminated fuel drain & cleanse right there on scene

Once carried out You Get Moving Once again

As soon as we have completed you can get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain authorities in the UK, having national service, for Mercedes motorists especially. We mainly attend:

  • Unleaded petrol in your Diesel Vehicle
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water 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 your house, we can get you on the road again.

The Process

The method of removing Petrol from a Diesel car is generally the same for the majority of vehicles. As you can imagine it can differ a bit as every make has their own distinct fuel system. Even so it still fundamentally adheres to 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

Should you have any queries or need our help please Call us!
We are able to get you moving once again.

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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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