A new light on your dashboard? You don’t understand why it doesn’t turn off… It’s normal, a car is complex and there are various factors why a light may occur. If your glow plug light comes on while driving your Mercedes Benz GLK, it might suggest 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 GLK operates, and then the different motives it lights up when you are driving

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

The primary purpose of the engine glow plug light, which is in most cases symbolized by a yellow coil, is to assure that your glow plugs are working effectively. In reality, it must light up when you switch on your Mercedes Benz GLK 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 vehicle. But, if it comes on while driving, it may suggest multiple issues, we will try to describe the most important ones.

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

A glow light that comes on while driving on your Mercedes Benz GLK or at any other time other than when the engine is started is designed to inform you to a fault other than your spark plugs, we will check out this right now. In any case, plug in your car to the diagnostic tool will allow you to precisely understand the cause for the light up of your glow light.

My Mercedes Benz GLK glow light comes on and I’m experiencing a loss of power

The first possibility is that you identify that your glow plug light comes on while driving your Mercedes Benz GLK and that you also knowledge a loss of power. In this instance, several complications can describe its lightning. Here is a list of the most important factors:

  • Issue of EGR valve, indeed, if you go through 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 GLK because it is one of the problem of which it is expected to alert you. Have the status of your valve examined
  • Problem associated with the turbo overflow valve, in this situation the ECU can no longer manage the turbo intake pressure, which can cause turbo boost and a perturbation in the performance of the turbo.
  • Problem 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 affect its proper operation.
  • Finally, the last problem that could lead to a glow indicator light on your Mercedes Benz GLK 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 Benz GLK

To conclude, we’ll give you the motives for a glow plug light that comes on on your Mercedes Benz GLK without you feeling any difference in power or vehicle behaviour. Generally, this is an electronic fault:

  • Glow plug relays or fuses to be swapped out, 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 problem.
  • You have a false contact somewhere in your electrical circuit, check the other solutions first because it is not easy to find it alone, we advise you to go to your auto mechanic.
  • Faulty injection pressure sensor, ECU error

    • To discover more tips on the Mercedes Benz GLK, take a look at the Mercedes Benz GLK category.