Contaminated fuel in your Mercedes C250 CDI? Petrol in a Diesel Mercedes?

We can help!
Call us: 0333 366 0103
Mercedes Fuel Drain


Filling up with Petrol in a Diesel Mercedes is a usual error. And exactly what you have to do about it will depend on a number of factors. If perhaps you want to find out what it is advisable to do about it then keep on reading.
Right here are the most crucial factors to think about when figuring out whether or not to have your car drained:

  1. How much Petrol did you put in to the Mercedes, keeping in mind that the fuel tank capacity of the Mercedes C250 CDI is normally around 59 litres?
    1. A modest quantity of Petrol, something like 2.95 litres of Petrol in a Diesel C250 CDI will normally not be a major problem. Experience has shown us that anything under 2.95 litres (almost 5% of the total fuel tank capacity) is quite often able to be adequately diluted simply by completely topping the tank with the right fuel.
      It's highly uncommon to come across an automobile going through problems with under 5% wrong fuel contamination. Keep in mind that it is very infrequent - in no way impossible to find. There are a number of automobiles that won't endure any amount of fuel contamination at all.
    2. Somewhere between 2.95 and 5.9 litres of Petrol in the Mercedes (from 5 to 10%) is really a 50/50 condition. Our expertise has confirmed that as many motorists get away with it as those people who don't. Whenever you are figuring out whether to chance it and basically fill it up bear in mind that it is exactly like gambling it all on black - you have a 50/50 chance of it being ok.
    3. Anything over 5.9 litres of Petrol in your Diesel C250 CDI should really straight away be drained as your likelihood of getting away with that level of contamination is in all likelihood lower than one in 50 - truly big odds.
  2. Put some Petrol in a Diesel Mercedes and drove it: Have you noted any kind of performance issues as a result of putting the bad fuel in your C250 CDI? In that case, get it emptied no matter the volume of Petrol or the contamination percentage. Continuing to drive driving a vehicle that is currently beginning to suffer the effects of wrong fuel contamination will probably just cause more harm affecting the fuel system components.
  3. Do you need assurance?
    In that case get it removed. Whatever the contamination ratio, there is inevitably a certain level of threat in connection with driving a Diesel vehicle on fuel contaminated with Petrol. Possible results of driving a car on the wrong fuel include the engine not starting, running lumpy, losing power, wearing of the high-pressure pump, damaged or bunged injectors, and so forth. These are several of the most frequently seen Petrol in Diesel signs and symptoms, and should you observe any of them stop driving and have it drained immediately.

Stay away from getting any untrained so-and-so to attend your automobile. We are Mercedes specialists and possess the qualifications and knowledge required to make sure that you are back on the road with a minimum of hassle or worry.

Put Petrol in a Diesel Mercedes

Inadvertently put Petrol in a Diesel Mercedes? Or possibly even put contaminated fuel in your Mercedes C250 CDI?

Contact us for Help & Guidance

Call us and receive genuine advice and sensible assistance for your exact situation

We come out and drain it

We are able to reach you to carry out the complete fuel drain & clean there on scene

Once completed You Get Moving Once again

Once we are done you can get back moving and get on with your day

Wrong Fuel Drain Specialists

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

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

We are Mercedes specialists and have successfully drained hundreds of Diesel Mercedes vehicles. Even if it's roadside, on a filling station forecourt, or even at home, we are able to get you going once again.

The Procedure

The system of removing Petrol from a Diesel car is essentially exactly the same for virtually all motor vehicles. As you can imagine it may differ a little as each make has their own different fuel system. However it still generally observes the below principles:

Petrol in Diesel Mercedes

Fuel Drain

Empty the Fuel Tank

View more
Wrong Fuel Drain Mercedes

System Flush

Clean out the fuel lines & pumps

View more
Petrol in Diesel Drain Mercedes

Vehicle Restart

Get the car up and running again

View more


Hours a Day


Days a Week





Our Partners

Just some of the few people we work with to bring you the best petrol in diesel service possible

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.

Call us

In the event that you have any concerns or need some assistance please Call us!
We are able to get you moving 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

Important Info

Fully Insured

VAT Registered

APEX Certified


Fully Mobile

Professionally Trained