Wrong fuel in your Mercedes S320 CDI? Petrol in a Diesel Mercedes?

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Mercedes Fuel Drain


Putting Petrol in a Diesel Mercedes is a regularly occurring mistake. And exactly what you want to do about it hinges on various things. In case you want to find out what it is best to do to fix it then please read on.
Listed below are the key variables to think about when deciding whether to get a fuel drain:

  1. What amount of Petrol did you put in the Mercedes, bearing in mind that the fuel tank capacity of the Mercedes S320 CDI is normally about 88 litres?
    1. A tiny amount of Petrol, something like 4.4 litres of Petrol in a Diesel S320 CDI will more often than not not really be a big problem. Experience has shown us that anything under 4.4 litres (about 5% of the entire fuel tank volume) is sometimes capable of being completely diluted by wholly topping up the rest of the tank with the right fuel.
      It's pretty rare to find a vehicle going through difficulties with under 5% incorrect fuel contamination. Keep in mind that it's uncommon - in no way impossible to find. There are a number of motor vehicles that don't stand any quantity of contamination in the slightest.
    2. Anywhere between 4.4 and 8.8 litres of Petrol in the Mercedes (from 5 to 10%) is really a 50/50 scenario. Our experience has proven that as many drivers get away with it as those who don't. Any time you are deciding upon whether or not to risk it and just simply fill it up bear in mind that it is much like betting everything on black - you will have a 50/50 possibility of it being ok.
    3. Anything above 8.8 litres of Petrol in a Diesel S320 CDI ought to straightaway be drained because your probability of succeeding with this quantity of contamination is undoubtedly lower than one in fifty - genuinely huge odds.
  2. Put Petrol in a Diesel Mercedes and drove it: Have you observed any kind of performance difficulties after putting the wrong fuel in your S320 CDI? If you have, get it drained irrespective of the quantity of Petrol or even the contamination ratio. Continuing to drive driving a car that is starting to suffer the consequences of fuel contamination can definitely lead to even more damage being done to the fuel system parts.
  3. Do you want peace of mind?
    Simply get it drained. Regardless of contamination percentage, there is always some degree of threat connected with running a Diesel engine on Diesel contaminated with the incorrect fuel. Possible consequences of driving a vehicle on the incorrect fuel include the engine refusing to start, running lumpy, lack of power, degradation of the high-pressure pump, damaged or clogged injectors, and so forth. These are several of the most typical Petrol in Diesel symptoms, and should you notice any of them then cease driving and have it drained immediately.

Don't simply have any unqualified mechanic to attend your automobile. We are Mercedes specialists and have got the skills and practical experience necessary to make sure that you are back on the road with little 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 S320 CDI?

Call us for Assistance & Recommendations

Give us a call and obtain honest recommendations and practical assistance for your precise circumstances

We show up and drain it

We can come to you to perform the full contaminated fuel drain & clean there on scene

All done & You Get Moving Again

When we are done you should be able to get back on your way and get on with your day

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain authorities in the UK, having countrywide coverage, for Mercedes motorists in particular. We predominantly deal with:

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

We are Mercedes specialists and have successfully drained thousands of Diesel Mercedes vehicles. Whether it is roadside, on a petrol station forecourt, or even at home, we can get you on the road again.

The Procedure

The method of getting rid of Petrol from a Diesel car is fundamentally similar for the vast majority of motor vehicles. Naturally it can differ a bit as each brand has their unique distinct fuel system. Having said that it still follows 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 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

Should you have any enquiries or want some help please Contact Us!
We are able to get you moving 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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