A new warning light on your dashboard? You don’t understand why it doesn’t shut off… It’s normal, an auto is complex and there are various causes why a light may come on. In cases where your glow plug light comes on while driving your Mercedes Benz GLE Class, it may possibly indicate different problems. In the following paragraphs, we will do everything we can to help you see things more clearly. First, we will find out how the preheating light on your Mercedes Benz GLE 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 GLE Class glow plug light?

The main goal of the engine glow plug light, which is most of the time represented by a yellow coil, is to ensure that your glow plugs are working properly. In fact, it must light up when you switch on your Mercedes Benz GLE 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 expected to stay or come on while driving with your car. Nevertheless, if it turns on while driving, it may indicate different failures, we will try to summarize the main ones.

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

A glow light that comes on while driving on your Mercedes Benz GLE Class or at any other time other than when the engine is started is intended to notify you to a problem other than your spark plugs, we will take a look at this right now. No matter the reason, connecting your vehicle to the diagnostic tool will allow you to precisely understand the cause for the light up of your glow light.

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

The first probability is that you perceive that your glow plug light comes on while driving your Mercedes Benz GLE Class and that you also encounter a loss of power. In this case, different complications can explain its lightning. Here is a list of the main causes:

  • Trouble of EGR valve, indeed, if you suffer a loss of power, it is possible that your EGR valve is clogged, in such a case, it is expected that your preheat light comes on while driving on Mercedes Benz GLE Class because it is one of the issue of which it is meant to notify you. Have the status of your valve checked out
  • Problem related 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 performance of the turbo.
  • Problem relevant to the injection, either an injector that has seized up or the injection pump that is destroyed by filings or other possible foreign bodies that disturb its proper operation.
  • Finally, the last problem that could lead to a glow indicator light on your Mercedes Benz GLE 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 GLE Class

Finally, we’ll give you the explanations for a glow plug light that comes on on your Mercedes Benz GLE Class without you feeling any difference in power or car behaviour. Ordinarily, 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 get rid of the problem.
  • You have a false contact somewhere in your electrical circuit, test the other solutions first because it is not easy to find it alone, we recommend you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

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