Wrong fuel in your Mercedes B220? Diesel in your Petrol Mercedes?

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


Putting Diesel in a Petrol Mercedes is a regularly occurring problem. And its remedy is based on several things. Assuming you want to know what you need to do about it then keep on reading.
Here are the key factors to keep in mind whenever determining whether or not to have a fuel drain:

  1. Exactly how much Diesel did you put into the Mercedes, taking into account that the fuel tank capacity of your Mercedes B220 is in most cases roughly 50 litres?
    1. A modest amount of Diesel, less than 2.5 litres of Diesel in a Petrol B220 will in most cases not be a massive problem. Experience has proven to us that anything under 2.5 litres (approximately 5% of the total fuel tank volume) is generally able to be completely diluted by means of thoroughly filling up the rest of the tank with Petrol.
      It's highly unusual to encounter an automobile having difficulties due to below 5% wrong fuel contamination. Do not forget that it is infrequent - definitely not impossible to find. You can get certain motor vehicles that will not stand any amount of contamination in the slightest.
    2. In between 2.5 and 5 litres of Diesel in the Mercedes (5 to 10%) is more of a 50/50 condition. Our expertise has proven that as many motorists get away with this as those who don't. When you are deciding on whether or not to chance it and just top it up bear in mind that it is the same as betting your car on black - you will have a 50/50 chance of it working out.
    3. Anything above 5 litres of Diesel in a Petrol B220 really should right away be drained as your likelihood of succeeding with this level of contamination is more than likely lower than one in fifty - really big odds.
  2. Put some Diesel in a Petrol Mercedes and drove it: Have you spotted any kind of performance troubles since putting the bad fuel in the B220? If you have, get it removed regardless of the quantity of Diesel or even the contamination ratio. Continually running a motor vehicle that is beginning to suffer the consequences of fuel contamination can only end up in more and more damage affecting your fuel system components.
  3. Would you like security?
    You should get it drained. Regardless of the contamination ratio, there is invariably some degree of threat associated with driving a Petrol engine on fuel contaminated with Diesel. Probable implications of driving on the wrong fuel can include the motor refusing to start, running unevenly, reduced power, wearing of the high-pressure pump, damaged or blocked injectors, etc. These are some of the most common Diesel in Petrol symptoms, and should you recognise any of them then stop and have it drained right now.

Don't just have any jack-of-all-trades to attend your vehicle. We are Mercedes specialists and hold the accreditation and working experience required to make certain you get back on the road with little hassle or trouble.

Put Diesel in a Petrol Mercedes

By mistake put Diesel in a Petrol Mercedes? Or possibly even put contaminated fuel in your Mercedes B220?

Contact us for Help & Advice

Contact us and obtain sincere recommendations and sensible assistance for your precise situation

We arrive and drain it

We are able to go to you to perform the fuel drain & flush there on scene

Once done You Get Moving Again

Once we have finished you can get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain experts in the UK, having national service, for Mercedes motorists in particular. We primarily attend to:

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

We are Mercedes specialists and have successfully drained hundreds of Petrol Mercedes vehicles. Whether it's at the roadside, on a station forecourt, or even at your house, we can get you on the road again.

The Process

The system of removing Diesel from a Petrol car is basically the same for a large number of cars. Of course it does vary somewhat as every make has their unique different fuel system. However it still follows the below points:

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

Diesel in Petrol FAQs

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

If you have any queries or need some 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


Important Info

Fully Insured

VAT Registered

APEX Certified


Fully Mobile

Professionally Trained