You’ve almost certainly previously heard of the popular EGR valve, the anti-pollution valve. It is not always appreciated by motorists because it is likely to cause more problems than anything else… In reality, according to the use you are going to make of your automobile, it can become clogged and bring about you a lot of concerns. If this is the situation, you are almost certainly wanting to know how to clean the EGR valve of your Mercedes Benz C Class ? Don’t worry, we’ve written this content page to help you with this task. To do so, we will first take a look at the goal of the EGR valve, then what are the failures that the EGR valve of your Mercedes Benz C Class can bring on and finally the part that will almost certainly concern you the most, how to clean the EGR valve Mercedes Benz C Class?

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How to Clean your Mercedes Benz C Class EGR Valve: Role and Operation

Purpose of the EGR valve

The EGR valve of your car has been added to diesel engines primarily to reduce pollution released by vehicles and to fulfill EURO requirements on Mercedes Benz C Class . It will therefore influence the quality of exhaust gas output and get rid of toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we discover how to clean the EGR valve on your Mercedes Benz C Class , we will have a look at how it works. As seen before, its mission is to clean the exhaust fumes, so it will be placed at the engine outlet, thanks to a valve, it will be able to return the unburned exhaust gases to the engine for a second burn which will get rid of all unburned toxic particles. It will operate mostly at low speed because at high speed the combustion is sufficient to burn all these gases.

How to clean your Mercedes Benz C Class EGR valve: Identifying faults

The EGR valve, even though very effective to limit the pollution emissions of your Mercedes Benz C Class , will sadly tend to clog up because of soot/gas deposits that will accumulate in its system, which will ultimately risk obstructing the operation of the valve, until entirely blocking the engine motor, here are the symptoms that a faulty EGR valve on your Mercedes Benz C Class can trigger:

  • Motor light on
  • Performance loss
  • Technical assesment rejected
  • Black fumes
  • Vehicle that grazes at low speed
  • Low RPM settings

How to clean your Mercedes Benz C Class EGR valve: In practice

And now we’ll begin the part you are most excited about, how to clean the EGR valve of your car. Here are the two solutions that you can use.

Do it yourself

How to clean your Mercedes Benz C Class EGR valve system: Without taking it apart

Even though this methodology is less effective, it is however possible to consider a “rough” cleaning of your EGR valve, the truth is, you will only need to use fuel additives, equivalent to the products used to clean the injection. These specific solutions must be injected into the running engine, at the right operating temperature, diluted in about 20 litres of fuel and run the engine for 3 or 4 minutes in high rev to clean the EGR valve of your Mercedes Benz C Class.

How to clean your car EGR valve: With disassembly

Here is the most beneficial methodology, which will require sufficient access to the EGR valve to carry out the treatment without help. If so, the procedure is fairly simple. You will need to disconnect the electromagnet from the EGR valve, remove the few screws that hold it in place, and remove it. Once these steps are carried out, now comes the time for cleaning. To make this happen, you will need to use a product such as solvent, petrol, oven cleaning product, which you will leave to act for ten minutes, then scrape off the rest using a scraper, finish cleaning with wire brush. If you want to go further, you can even clean the two canal on which it is connected which may be scorched, for this, use a scraper and a vacuum cleaner to avoid dropping deposits in the conduits. You will only have to reassemble it and you will have finished cleaning the EGR valve of your Mercedes Benz C Class.

Have it done by a professional

If, your EGR valve is not reachable because of the series or the engine of your car and if removing it would cause too many troubles (removing too many auto parts that hinder access for example), how to clean the EGR valve of your Mercedes Benz C Class? In cases like this, it would be better rather than launching yourself into an overly complex task, you turn to an auto mechanic. He will be able to do the job more cleanly and will be able, if required, to change the valve if it is dead. The cost of cleaning according to the difficulty of access is between 70 and 300 €.

Remove the EGR valve of your Mercedes Benz C Class

Finally, some individuals make a more radical decision to limit the risk of a failed valve. Instead of cleaning the EGR valve of their Mercedes Benz C Class, they simply choose to block it in the closed position. This treatment will have the outcome of greatly increasing the pollution released by the automobile, of no longer complying with pollution standards, of having an engine warning light all day on and finally risk fouling the engine. We highly advise against making this choice. If you have other questions or want to learn more about your car, don’t think twice to take a look at our dedicated page.

In the event that you have any further questions about the Mercedes Benz C Class, do not hesitate to consult our Mercedes Benz C Class category.