Bad fuel in your Mercedes B180? Diesel in a Petrol Mercedes?

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


Filling Diesel in a Petrol Mercedes is a usual mistake. And what you need to do about it will depend on a variety of things. If perhaps you would like to know what you ought to do to fix it then keep reading.
Let us discuss the main variables to take into consideration when deciding whether to have a fuel drain:

  1. What amount of Diesel did you put in the Mercedes, taking into account that the fuel tank capacity of the Mercedes B180 is probably around 54 litres?
    1. A tiny quantity of Diesel, something like 2.7 litres of Diesel in a Petrol B180 will normally not necessarily be a big problem. Experience has taught us that an amount under 2.7 litres (roughly 5% of the whole fuel tank) is oftentimes capable of being adequately diluted simply by completely filling the tank with Petrol.
      It is relatively rare to come across a vehicle experiencing difficulties with under 5% incorrect fuel contamination. Remember that it is rare - definitely not impossible to find. There are actually some automobiles that will not endure any amount of fuel contamination in the slightest.
    2. In between 2.7 and 5.4 litres of Diesel in the Mercedes (from 5 to 10%) is really a 50/50 scenario. Our practical experience has shown that as many motorists get away with it as those who break down. When deciding whether or not to chance it and just fill it up recognise that it is very much like gambling your car on black - you have got a 50/50 possibility of it being ok.
    3. Anything over 5.4 litres of Diesel in your Petrol B180 really should immediately be drained out as your likelihood of getting away with this quantity of contamination is in all likelihood lower than one in 50 - genuinely huge odds.
  2. Put Diesel in a Petrol Mercedes and drove it: Have you noticed any performance troubles after putting the bad fuel in the B180? In that case, have it emptied irrespective of the amount of Diesel or the contamination percentage. Continuing to drive driving a vehicle that is already beginning to suffer from the effects of fuel contamination will typically lead to more damage being caused to the fuel system.
  3. Are you interested in peace of mind?
    Then simply just get it emptied. Whatever the contamination ratio, there is invariably a certain level of threat linked with operating a Petrol vehicle on fuel contaminated with Diesel. Possible implications of driving on the wrong fuel normally include the engine refusing to start, running lumpy, decrease in power, wearing of the high-pressure pump, worn out or blocked injectors, etc. These are a few of the most common Diesel in Petrol signs or symptoms, and should you recognise any of them stop and get it removed immediately.

Refrain from getting any jack-of-all-trades to attend your vehicle. We are Mercedes experts and have got the qualifications and practical experience needed to ensure you get back on the road with minimum hassle or worry.

Put Diesel in a Petrol Mercedes

Inadvertently put Diesel in a Petrol Mercedes? Or perhaps even put contaminated fuel in your Mercedes B180?

Contact us for Assistance & Recommendations

Contact us and receive genuine recommendations and sensible assistance for your precise circumstances

We arrive and drain it

We would go to you to do the contaminated fuel drain & cleanse there on scene

Once carried out You Get Going Once again

When we have finished you can get back on your way and get on with your trip

Wrong Fuel Drain Specialists

We are the top rated wrong fuel drain professionals in the UK, boasting countrywide service, for Mercedes motorists especially. We mostly attend:

  • Unleaded petrol in Diesel Vehicle
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water fuel contamination

We are Mercedes specialists and have successfully drained thousands of Petrol Mercedes vehicles. Whether or not it is roadside, on a filling station forecourt, or even at your home, we are able to get you on the road once again.

The Procedure

The procedure of extracting Diesel from a Petrol vehicle is essentially similar for the vast majority of vehicles. Needless to say it does differ somewhat as each manufacturer has their particular fuel system. Even so it still basically follows 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

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

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