Bad fuel in your Mercedes S350? Diesel in your Petrol Mercedes?

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Mercedes Fuel Drain


Filling Diesel in a Petrol Mercedes is a regularly occurring mistake. And exactly what you should do about it is dependent upon a variety of factors. If you want to find out what you must do about it then keep reading.
Listed here the key factors to keep in mind when making a decision whether or not to get a fuel drain:

  1. What level of Diesel did you put in the Mercedes, considering that the fuel capacity of your Mercedes S350 is most likely roughly 88 litres?
    1. Hardly any Diesel, something like 4.4 litres of Diesel in a Petrol S350 will most of the time not really be a huge problem. Experience has shown us that anything under 4.4 litres (almost 5% of the overall fuel tank capacity) is very often able to be sufficiently diluted simply by wholly topping up the remainder of the tank with Petrol.
      It's extremely unusual to come across a car or truck having difficulties due to below 5% incorrect fuel contamination. Please remember it's rare - definitely not impossible to encounter. There are a number of automobiles that will not stand any degree of fuel contamination in the slightest.
    2. Between 4.4 and 8.8 litres of Diesel in the Mercedes (from 5 to 10%) is more of a 50/50 scenario. Our expertise has shown 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 simply top it up remember that it is much like gambling all of it on black - you have a 50/50 chance of it working.
    3. Anything more than 8.8 litres of Diesel in a Petrol S350 must straight away be drained out seeing as your probability of succeeding with that amount of contamination is probably below one in 50 - extremely long odds.
  2. Put Diesel in a Petrol Mercedes and drove it: Have you noticed any kind of performance difficulties after putting the wrong fuel in the S350? If you have, have it emptied no matter the quantity of Diesel or the contamination ratio. Continually driving a motor vehicle that is now starting to suffer the effect of wrong fuel contamination can definitely be responsible for more harm being caused to your fuel system.
  3. Would you like reassurance?
    Then get it removed. No matter the contamination ratio, there is invariably some extent of danger connected to running a Petrol vehicle on Petrol contaminated with Diesel. Probable results of driving a car on the wrong fuel normally include the engine refusing to start, running unevenly, reduced power, wearing of the high-pressure pump, damaged or bunged injectors, etc. These are some of the commonest Diesel in Petrol warning signs, and should you detect any of them then stop and have it drained right away.

Don't just have any jack-of-all-trades to try to repair your vehicle. We are Mercedes specialists and have got the credentials and experience necessary to ensure you are back on the road with minimal hassle or trouble.

Put Diesel in a Petrol Mercedes

Inadvertently put Diesel in a Petrol Mercedes? Or possibly even put contaminated fuel in your Mercedes S350?

Call us for Assistance & Guidance

Contact us and receive straightforward guidance and practical help for your specific circumstance

We arrive and do a fuel drain

We are able to go to you to carry out the contaminated fuel drain & flush there on scene

All done & You Get Going Again

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

Wrong Fuel Drain Specialists

We are the primary wrong fuel drain professionals in the UK, offering national service, for Mercedes motorists especially. We principally deal with:

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

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

The Process

The method of draining Diesel from a Petrol vehicle is basically the same for a large number of motor vehicles. As you can imagine it may differ a bit as each brand has their particular distinct fuel system. Even so it still essentially observes the following principles:

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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Diesel in Petrol Questions

When someone has put Diesel in a Petrol car they have a few very common questions. So we have compiled a list of the most Frequently Asked Questions for you

I put Diesel in a Petrol 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 Petrol car on Diesel 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 Diesel can I get away with in a Petrol 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 Petrol 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 enquiries or want our help please Call us!
We are able to get you on the road once again.

24 hour Mercedes Helpline

0333 366 0103

Our Corporate Office

Fuel Fixer Ltd, Linx House, 147 London Road, East Grinstead, RH19 1ET

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