A new warning light on your dashboard? You don’t figure out why it doesn’t turn off… It’s normal, an automobile is complex and there are various motives why a light could occur. If it turns out your glow plug light comes on while driving your Mercedes Benz GLC Class, it may possibly signify different problems. In this post, we will do everything we can to support you see things more clearly. First, we will find out how the preheating light on your Mercedes Benz GLC Class functions, and then the different explanations it lights up when you are driving

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What is the purpose of my Mercedes Benz GLC Class glow plug light?

The main purpose of the engine glow plug light, which is most of the time symbolized by a yellow coil, is to make sure that your glow plugs are working properly. In fact, it must light up when you switch on your Mercedes Benz GLC Class 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 meant to stay or come on while driving with your vehicle. But, if it turns on while driving, it may reveal different 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 GLC Class?

A glow light that comes on while driving on your Mercedes Benz GLC Class or at any other time other than when the engine is started is meant to alert you to a problem other than your spark plugs, we will look at this now. Whatever the case, connecting your vehicle to the diagnostic tool will allow you to properly interpret the reason for the light up of your glow light.

My Mercedes Benz GLC Class glow light comes on and I’m going through a loss of power

The first possibility is that you perceive that your glow plug light comes on while driving your Mercedes Benz GLC Class and that you also experience a loss of power. In this instance, different trouble can demonstrate its presence. Here is a list of the most important motives:

  • Trouble of EGR valve, in reality, if you suffer a loss of power, it is possible that your EGR valve is clogged, in this instance, it is logical that your preheat light comes on while driving on Mercedes Benz GLC Class because it is one of the issue of which it is intended to alert you. Have the status of your valve tested
  • Trouble linked 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.
  • 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 disturb its proper operation.
  • Finally, the last trouble that could lead to a glow indicator light on your Mercedes Benz GLC Class 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 Benz GLC Class

To finish , we’ll give you the explanations for a glow plug light that comes on on your Mercedes Benz GLC Class without you feeling any difference in power or vehicle behaviour. In most cases, this is an electronic problem:

  • Glow plug relays or fuses to be changed, 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 the other options first because it is not easy to find it alone, we advise you to go to your auto technician.
  • Faulty injection pressure sensor, ECU error
  • To get more tips on the Mercedes Benz GLC Class, take a look at the Mercedes Benz GLC Class category.