You’ve probably previously heard about the famous EGR valve, the anti-pollution valve. It is not generally appreciated by drivers because it tends to create more trouble than anything else… In fact, based on the use you are going to make of your vehicle, it can become clogged and bring about you a lot of problems. If this is the case, you are probably concerned about how to clean the EGR valve of your Mercedes Benz GLS Class ? Don’t worry, we’ve well prepared this article to help you with this procedure. To do so, we will first check out the goal of the EGR valve, then what are the failures that the EGR valve of your Mercedes Benz GLS Class can reason and at last the section that will probably appeal you the most, how to clean the EGR valve Mercedes Benz GLS Class?

clean-egr-valve-mercedes-benz-gls-class

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

Role of the EGR valve

The EGR valve of your car has been integrated to diesel engines mostly to reduce pollution released by vehicles and to fulfill EURO requirements on Mercedes Benz GLS Class . It will as a consequence control the quality of exhaust gas output and get rid of toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we learn how to clean the EGR valve on your Mercedes Benz GLS Class , we will have a look at how it operates. As seen just before, its task 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 get rid of all unburned toxic particles. It will function principally at low speed because at high speed the combustion is enough to burn all these gases.

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

The EGR valve, nevertheless very effective to limit the pollution emissions of your Mercedes Benz GLS Class , will unfortunately tend to clog up because of soot/gas deposits that will build up in its mechanism, which will finally risk obstructing the functions of the valve, until entirely blocking the engine motor, here are the symptoms that a defective EGR valve on your Mercedes Benz GLS Class can provoke:

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

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

And now we’ll begin the section you are most interested in, 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 GLS Class EGR valve system: Without dismantle

Even though this approach 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, similar 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 GLS Class.

How to clean your car EGR valve: With disassembly

Here is the best approach, which will require enough access to the EGR valve to do the treatment on your own. 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 guidelines are completed, 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 also 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 GLS 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 problems (removing too many elements that hinder access for example), how to clean the EGR valve of your Mercedes Benz GLS Class? In such a 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 accomplish the job more cleanly and will be able, if necessary, to change the valve if it is dead. The cost of cleaning based on the difficulty of access is between 70 and 300 €.

Remove the EGR valve of your Mercedes Benz GLS 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 GLS Class, they simply choose to block it in the closed position. This treatment will have the effect of greatly increasing the pollution released by the vehicle, of no longer complying with pollution criteria, of having an engine warning light all day on and eventually risk fouling the engine. We highly 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.

If perhaps you have any additional questions about the Mercedes Benz GLS Class, do not hesitate to consult our Mercedes Benz GLS Class category.