Bad fuel in a Mercedes B200 CDI? Petrol in your Diesel Mercedes?

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


Filling up with Petrol in a Diesel Mercedes is a common mistake to make. And exactly what you need to do about it depends upon various factors. If perhaps you would like to find out what you have to do to sort it out then keep reading.
Right here are the main factors to take into account whenever deciding whether or not to get it drained:

  1. What amount of Petrol did you put in the Mercedes, keeping in mind that the fuel tank capacity of your Mercedes B200 CDI is normally about 54 litres?
    1. A tiny amount of Petrol, less than 2.7 litres of Petrol in a Diesel B200 CDI will generally not be a major problem. Experience has taught us that an amount under 2.7 litres (roughly 5% of the fuel tank capacity) is very often capable of being completely diluted by completely topping the tank with Diesel.
      It is very rare to encounter a car experiencing issues with below 5% incorrect fuel contamination. Please remember it's unusual - certainly not impossible to encounter. There are actually a few cars that will not endure any amount of contamination whatsoever.
    2. Between 2.7 and 5.4 litres of Petrol in the Mercedes (5 to 10%) is a 50/50 scenario. Our practical experience has shown that as many drivers get away with it as all those who don't. Any time you are deciding whether or not to risk it and just simply top it up consider that it is exactly like betting all of it on black - you have a 50/50 chance of it working.
    3. Anything above 5.4 litres of Petrol in your Diesel B200 CDI should really as soon as possible be drained out seeing that your likelihood of driving with that quantity of contamination is in all likelihood lower than one in 50 - really huge odds.
  2. Put Petrol in a Diesel Mercedes and drove it: Have you observed any performance difficulties as a result of putting the bad fuel in your B200 CDI? If so, have it emptied irrespective of the quantity of Petrol or the contamination ratio. Continually driving a motor vehicle that is beginning to suffer from the effects of fuel contamination will probably typically bring about increasing amounts of harm being caused to your fuel system components.
  3. Are you looking for reassurance?
    Simply get it emptied. Whatever the contamination ratio, there is inevitably some degree of risk associated with operating a Diesel engine on fuel contaminated with the wrong fuel. Possible consequences of driving a car on the incorrect fuel can include the engine refusing to start, running unevenly, loss of power, wearing of the high-pressure pump, worn or clogged injectors, and so forth. These are several of the most common Petrol in Diesel warning signs, and should you notice any of them stop and get it drained as soon as possible.

Avoid getting any jack-of-all-trades to attend your automobile. We are Mercedes specialists and possess the certification and expertise needed to make certain that you get back on the road with minimal hassle or worry.

Put Petrol in a Diesel Mercedes

Mistakenly put Petrol in a Diesel Mercedes? Or possibly even put contaminated fuel in your Mercedes B200 CDI?

Give us a call for Help & Recommendations

Call us and receive sincere advice and sensible help for your particular circumstances

We arrive and do the fuel drain

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

All done & You Get Going Once again

As soon as we have completed you will be able to get back on your way and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain specialists in the UK, offering countrywide cover, for Mercedes motorists especially. We mostly attend:

  • Unleaded petrol in your Diesel Car
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue contamination
  • Water contamination

We are Mercedes specialists and have successfully drained thousands of Diesel Mercedes vehicles. Whether or not it's roadside, on a station forecourt, or even at your home, we are able to get you going once again.

The Process

The technique of draining Petrol from a Diesel car is generally similar for most vehicle makes. Obviously it does differ to some extent as every brand has their own distinct fuel system. Nevertheless it still basically 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 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.

Get in Touch

Should you have any concerns or want help please Contact Us!
We are able to get you going once 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

Important Info

Fully Insured

VAT Registered

APEX Certified


Fully Mobile

Professionally Trained