A new light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, an automobile is elaborate and there are many reasons why a light could occur. If your glow plug light comes on while driving your Mercedes Benz GL Class, it may possibly signify some issues. In this post, we will do anything we can to support you see things more clearly. First, we will discover how the preheating light on your Mercedes Benz GL Class functions, and then the different causes it lights up when you are driving

glow-plug-light-mercedes-benz-gl-class

What is the goal of my Mercedes Benz GL Class glow plug light?

The main role of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to guarantee that your glow plugs are working effectively. Indeed, it must light up when you switch on your Mercedes Benz GL 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 car. But, if it comes on while driving, it may reveal different troubles, we will try to point out the main ones.

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

A glow light that comes on while driving on your Mercedes Benz GL Class or at any other time other than when the engine is started is meant to notify you to a fault other than your spark plugs, we will check out this now. No matter the reason, plug in your car to the diagnostic tool will allow you to properly translate the motive for the light up of your glow light.

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

The first situation is that you recognize that your glow plug light comes on while driving your Mercedes Benz GL Class and that you also knowledge a loss of power. In such a case, some complications can explain its presence. Here is a list of the main reasons:

  • Issue of EGR valve, in reality, if you suffer a loss of power, it is possible that your EGR valve is blocked, in this case, it is expected that your preheat light comes on while driving on Mercedes Benz GL Class because it is one of the issue of which it is intended to alert you. Have the status of your valve checked out
  • Issue related to the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can bring about turbo boost and a perturbation in the operation of the turbo.
  • Issue 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 affect its proper performing.
  • Finally, the last trouble that could lead to a glow indicator light on your Mercedes Benz GL Class coupled with a loss of power, is that your fuel filter is too dirty, you should encounter 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 GL Class

To conclude, we’ll give you the causes for a glow plug light that comes on on your Mercedes Benz GL Class without you feeling any difference in power or car 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 get rid of 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 advise you to go to your repair shop.
  • Faulty injection pressure sensor, ECU error

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