How to clean my Mercedes Benz CLA Class EGR valve ?

You’ve most likely already heard of the popular EGR valve, the anti-pollution valve. It is not usually appreciated by car owners because it is likely to create more trouble than anything else… Indeed, according to the use you are going to make of your car, it can become clogged and bring about you a lot of concerns. If this is the situation, you are most likely concerned about how to clean the EGR valve of your Mercedes Benz CLA Class ? Don’t stress, we’ve written this article to help you with this procedure. To accomplish this, we will initially check out the role of the EGR valve, then what are the failures that the EGR valve of your Mercedes Benz CLA Class can bring on and finally the part that will most likely interest you the most, how to clean the EGR valve Mercedes Benz CLA Class?

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

Goal of the EGR valve

The EGR valve of your car has been added to diesel engines principally to reduce pollution emitted by automobiles and to fulfill EURO standards on Mercedes Benz CLA Class . It will as a consequence control the quality of exhaust gas output and reduce toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we discover how to clean the EGR valve on your Mercedes Benz CLA Class , we will have a look at how it works. As seen before, its goal is to clean the exhaust fumes, so it will be positioned 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 reduce all unburned toxic particles. It will operate mainly at low speed because at high speed the combustion is sufficient to burn all these gases.

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

The EGR valve, despite the fact very beneficial to limit the pollution emissions of your Mercedes Benz CLA Class , will unfortunately tend to clog up because of soot/gas deposits that will build up in its system, which will ultimately risk obstructing the operation of the valve, until entirely blocking the engine unit, here are the symptoms that a defective EGR valve on your Mercedes Benz CLA Class can cause:

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

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

And now we’ll start the part you are most intrigued by, how to clean the EGR valve of your car. Here are the two techniques that you can use.

Do it on your own

How to clean your Mercedes Benz CLA Class EGR valve system: Without dismantle

Although this approach is less efficient, it is however possible to consider a “rough” cleaning of your EGR valve, the reality is, you will only need to use fuel additives, equivalent to the products used to clean the injection. These specific products 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 CLA Class.

How to clean your car EGR valve: With disassembly

Here is the most effective approach, which will require sufficient access to the EGR valve to conduct the treatment yourself. If so, the procedure is fairly straightforward. 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 done, now comes the time for cleaning. To accomplish this, 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 conduits 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 CLA 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 CLA Class? In this case, it would be better rather than launching yourself into an overly complex procedure, you turn to an auto mechanic. He will be able to carry out 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 CLA Class

At last, a number of people make a more radical decision to limit the risk of a failed valve. Rather than cleaning the EGR valve of their Mercedes Benz CLA Class, they simply prefer to block it in the closed position. This modification will have the result of greatly increasing the pollution emitted by the car, of no longer complying with pollution standards, of having an engine warning light permanently on and finally risk fouling the engine. We strongly recommend against making this choice. If you have other questions or want to learn more about your car, don’t think twice to check out our dedicated page.

To discover more tips on the Mercedes Benz CLA Class, take a look at the Mercedes Benz CLA Class category.