Bad fuel in a Mercedes CLC 250? Diesel in a Petrol Mercedes?

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Mercedes Fuel Drain


Filling up with Diesel in a Petrol Mercedes is a common mistake to make. And its solution depends upon several things. Assuming you would like to find out what it is advisable to do to fix it then keep on reading.
These are the main variables to consider when deciding on whether or not to have a fuel drain:

  1. Exactly how much Diesel have you put in to the Mercedes, taking into consideration that the fuel capacity of the Mercedes CLC 250 is in most cases around 62 litres?
    1. A tiny quantity of Diesel, something like 3.1 litres of Diesel in a Petrol CLC 250 will more often than not not really be a significant problem. Experience has shown us that an amount under 3.1 litres (which is roughly 5% of the total fuel tank) is generally able to be sufficiently diluted through thoroughly filling up the remainder of the tank with the right fuel.
      It's very uncommon to come across a motor vehicle having difficulties with under 5% incorrect fuel contamination. Keep in mind that it is very rare - not impossible to encounter. There are some motor vehicles that will not stand any level of contamination in the slightest.
    2. In between 3.1 and 6.2 litres of Diesel in the Mercedes (from 5 to 10%) is really a 50/50 scenario. Our practical experience has revealed that as many motorists get away with it as all those who break down. When deciding on whether to risk it and just fill it up consider that it is much like betting all of it on black - you will have a 50/50 chance of it being ok.
    3. Anything in excess of 6.2 litres of Diesel in a Petrol CLC 250 should really right away be drained as your likelihood of driving with that level of contamination is probably below one in fifty - extremely big odds.
  2. Put some Diesel in a Petrol Mercedes and drove it: Have you observed any performance issues ever since putting the wrong fuel in your CLC 250? If you have, get it emptied irrespective of the quantity of Diesel or even the contamination percentage. Continuing to run running an automobile that is now starting to suffer from the effects of wrong fuel contamination will likely bring about even more harm affecting your fuel system components.
  3. Are you interested in peace of mind?
    Then get it removed. Regardless of the contamination ratio, there is inevitably some extent of threat associated with operating a Petrol engine on fuel contaminated with Diesel. Probable final outcomes of driving a vehicle on the wrong fuel normally include the engine not starting, running lumpy, loss in power, wearing of the high-pressure pump, worn out or bunged injectors, and the like. These are a few of the commonest Diesel in Petrol warning signs, and in the event that you recognise any of them then cease driving and have it removed right now.

Don't simply have any jack-of-all-trades to try to repair your car. We are Mercedes specialists and possess the certification and expertise needed to make sure that you get back on the road with minimum hassle or worry.

Put Diesel in a Petrol Mercedes

Mistakenly put Diesel in a Petrol Mercedes? Or even put contaminated fuel in your Mercedes CLC 250?

Give us a call for Assistance & Guidance

Give us a call and obtain straightforward advice and sensible assistance for your exact circumstances

We come out and do the fuel drain

We are able to go to you to carry out the full contaminated fuel removal & cleanse right there on scene

Once carried out You Get Moving Again

As soon as we are done you are able to get back moving 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 principally attend:

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

We are Mercedes specialists and have successfully drained hundreds of Petrol Mercedes vehicles. No matter if it is at the roadside, on a station forecourt, or even at home, we are able to get you on the road once again.

The Procedure

The process of extracting Diesel from a Petrol vehicle is essentially identical for most vehicle makes. Obviously it does vary a little as every make has their particular distinct fuel system. Nevertheless it still follows the below guidelines:

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

In case you have any enquiries or need our assistance please Call us!
We can get you going 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

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