A new light on your dashboard? You don’t figure out why it doesn’t turn off… It’s typical, a vehicle is elaborate and there are many factors why a light might come on. In the event that your glow plug light comes on while driving your Mercedes Classe V, it may reveal several problems. On this page, we will do everything we can to help you see things more clearly. First, we will see how the preheating light on your Mercedes Classe V operates, and then the different motives it lights up when you are driving

glow-plug-light-mercedes-classe-v

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

The primary 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 Classe V to tell you that they are heating the intake air in your cylinders and must go out after a few minutes when the engine is running. This preheat light is therefore not supposed to stay or come on while driving with your automobile. However, if it turns on while driving, it may show multiple troubles, we will try to summarize the most important ones.

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

A glow light that comes on while driving on your Mercedes Classe V or at any other time other than when the engine is started is designed to notify you to a problem other than your spark plugs, we will check out this now. In any case, plug in your car to the diagnostic tool will allow you to precisely translate the motive for the light up of your glow light.

My Mercedes Classe V glow light comes on and I’m suffering from a loss of power

The first possibility is that you notice that your glow plug light comes on while driving your Mercedes Classe V and that you also encounter a loss of power. In such a case, several complications can demonstrate its presence. Here is a list of the most important factors:

  • Problem of EGR valve, in reality, if you suffer a loss of power, it is possible that your EGR valve is clogged, in such a case, it is logical that your preheat light comes on while driving on Mercedes Classe V because it is one of the issue of which it is designed to alert you. Have the status of your valve inspected
  • Trouble linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can bring about turbo boost and a disturbance in the operation of the turbo.
  • Trouble linked to the injection, either an injector that has seized up or the injection pump that is malfunctioned by filings or other possible foreign bodies that disrupt its proper function.
  • Finally, the last trouble that could lead to a glow indicator light on your Mercedes Classe V coupled with a loss of power, is that your fuel filter is too dirty, you should get 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 V

Finally, we’ll give you the motives for a glow plug light that comes on on your Mercedes Classe V without you feeling any difference in power or automobile behaviour. Generally, this is an electronic problem:

  • Glow plug relays or fuses to be replaced, 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 fix the trouble.
  • You have a false contact somewhere in your electrical circuit, test out the other solutions first because it is not easy to find it alone, we encourage you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

    • If you wish more tutorials on the Mercedes Classe V, go to our Mercedes Classe V category.