A new warning light on your dashboard? You don’t figure out why it doesn’t turn off… It’s typical, a car is elaborate and there are many reasons why a light might occur. In the event that your glow plug light comes on while driving your Mercedes Classe B 2, it may signify some problems. In the following paragraphs, 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 B 2 works, and then the different motives it lights up when you are driving

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What is the role of my Mercedes Classe B 2 glow plug light?

The primary goal of the engine glow plug light, which is generally symbolized by a yellow coil, is to assure that your glow plugs are working properly. In fact, it must light up when you switch on your Mercedes Classe B 2 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 automobile. But, if it comes on while driving, it may show different troubles, we will try to describe the most important ones.

What to do if the glow plug light comes on while driving on my Mercedes Classe B 2?

A glow light that comes on while driving on your Mercedes Classe B 2 or at any other time other than when the engine is started is intended to notify you to a fault other than your spark plugs, we will check out this now. Whatever the case, plug in your car to the diagnostic tool will allow you to properly interpret the motive for the light up of your glow light.

My Mercedes Classe B 2 glow light comes on and I’m going through a loss of power

The first situation is that you identify that your glow plug light comes on while driving your Mercedes Classe B 2 and that you also knowledge a loss of power. In such a case, some problems can explain its lightning. Here is a list of the most important reasons:

  • Problem of EGR valve, in fact, if you are affected a loss of power, it is possible that your EGR valve is clogged, in this case, it is rational that your preheat light comes on while driving on Mercedes Classe B 2 because it is one of the problem of which it is designed to warn you. Have the status of your valve looked at
  • Trouble linked to the turbo overflow valve, in this situation the ECU can no longer control the turbo intake pressure, which can result in turbo boost and a disturbance in the performance of the turbo.
  • Trouble related 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 disrupt its proper performance.
  • Finally, the last problem that could lead to a glow indicator light on your Mercedes Classe B 2 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 Classe B 2

Finally, we’ll give you the motives for a glow plug light that comes on on your Mercedes Classe B 2 without you feeling any difference in power or automobile 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 solve the problem.
  • 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 suggest you to go to your mechanic.
  • Faulty injection pressure sensor, ECU error

    • If you want more tutorials on the Mercedes Classe B 2, go to our Mercedes Classe B 2 category.