A new light on your dashboard? You don’t figure out why it doesn’t switch off… It’s normal, a car is complicated and there are various reasons why a light might occur. If it turns out your glow plug light comes on while driving your Mercedes Benz E Class, it may indicate several problems. In this article, we will do anything we can to help you see things more clearly. First, we will discover how the preheating light on your Mercedes Benz E Class works, and then the different reasons it lights up when you are driving

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What is the role of my Mercedes Benz E Class glow plug light?

The main goal of the engine glow plug light, which is most of the time represented by a yellow coil, is to make sure that your glow plugs are working correctly. Indeed, it must light up when you switch on your Mercedes Benz E Class to tell you that they are heating the intake air in your cylinders and must go out after a few moments when the engine is running. This preheat light is therefore not expected to stay or come on while driving with your automobile. However, if it comes on while driving, it may suggest several failures, we will try to explain the most important ones.

What to do if the glow plug light comes on while driving on my Mercedes Benz E Class?

A glow light that comes on while driving on your Mercedes Benz E Class or at any other time other than when the engine is started is meant to warn you to a problem other than your spark plugs, we will take a look at this right now. No matter the reason, plug in your car to the diagnostic tool will allow you to carefully understand the explanation for the light up of your glow light.

My Mercedes Benz E Class glow light comes on and I’m having a loss of power

The first situation is that you detect that your glow plug light comes on while driving your Mercedes Benz E Class and that you also knowledge a loss of power. In this instance, several concerns can describe its lightning. Here is a list of the most important reasons:

  • Problem of EGR valve, in reality, if you go through a loss of power, it is possible that your EGR valve is clogged, in such a case, it is expected that your preheat light comes on while driving on Mercedes Benz E Class because it is one of the issue of which it is intended to notify you. Have the status of your valve looked at
  • Trouble related to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a perturbation in the operation of the turbo.
  • Trouble linked to the injection, either an injector that has seized up or the injection pump that is damaged by filings or other possible foreign bodies that disrupt its proper functioning.
  • Finally, the last trouble that could lead to a glow indicator light on your Mercedes Benz E Class coupled with a loss of power, is that your fuel filter is too dirty, you should feel jerks because of a bad fuel flow in the engine.

My glow plug light comes on or is flashing but no difference on the performance of my Mercedes Benz E Class

To conclude, we’ll give you the reasons for a glow plug light that comes on on your Mercedes Benz E Class without you feeling any difference in power or automobile behaviour. Ordinarily, this is an electronic problem:

  • Glow plug relays or fuses to be swapped out, test and replace if necessary.
  • A contactor/potentiometer on one of your pedals (brake, accelerator or clutch) has failed, often a simple de-seizure will be enough to solve the trouble.
  • You have a false contact somewhere in your electrical circuit, check the other alternatives first because it is not easy to find it alone, we suggest you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error

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