A new light on your dashboard? You don’t understand why it doesn’t turn off… It’s typical, a car is elaborate and there are various motives why a light might occur. In cases where your glow plug light comes on while driving your Mercedes Classe C 3, it may possibly suggest some things. In this post, we will do everything we can to help you see things more clearly. First, we will discover how the preheating light on your Mercedes Classe C 3 operates, and then the different explanations it lights up when you are driving

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What is the purpose of my Mercedes Classe C 3 glow plug light?

The primary intent of the engine glow plug light, which is in most cases represented by a yellow coil, is to guarantee that your glow plugs are working correctly. In fact, it must light up when you switch on your Mercedes Classe C 3 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 meant to stay or come on while driving with your vehicle. However, if it turns on while driving, it may show different issues, we will try to summarize the main ones.

What to do if the glow plug light comes on while driving on my Mercedes Classe C 3?

A glow light that comes on while driving on your Mercedes Classe C 3 or at any other time other than when the engine is started is intended to alert you to a fault other than your spark plugs, we will check out this now. No matter the reason, a switch to the diagnostic tool will allow you to accurately understand the reason for the light up of your glow light.

My Mercedes Classe C 3 glow light comes on and I’m encountering a loss of power

The first probability is that you recognize that your glow plug light comes on while driving your Mercedes Classe C 3 and that you also experience a loss of power. In such a case, some trouble can describe its lightning. Here is a list of the main motives:

  • Issue of EGR valve, in reality, if you undergo a loss of power, it is possible that your EGR valve is clogged, in this case, it is expected that your preheat light comes on while driving on Mercedes Classe C 3 because it is one of the problem of which it is supposed to alert you. Have the status of your valve inspected
  • Issue linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can cause turbo boost and a perturbation in the performance of the turbo.
  • Issue related 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 disturb its proper function.
  • Finally, the last trouble that could lead to a glow indicator light on your Mercedes Classe C 3 coupled with a loss of power, is that your fuel filter is too dirty, you should experience 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 Classe C 3

To finish , we’ll give you the explanations for a glow plug light that comes on on your Mercedes Classe C 3 without you feeling any difference in power or vehicle behaviour. Ordinarily, this is an electronic fault:

  • Glow plug relays or fuses to be replaced, test and change 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 resolve the trouble.
  • You have a false contact somewhere in your electrical circuit, test out the other options first because it is not easy to find it alone, we recommend you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error

    • Whenever you have any further questions about the Mercedes Classe C 3, do not hesitate to consult our Mercedes Classe C 3 category.