You have been driving peacefully for half an hour when suddenly the engine light begins to light up on your dashboard. Several cases arise in front of you when this is the case, we will identify them and analyze them in order to help you. First of all, you should know that in most cases, an engine light that comes on symbolizes a major problem on your Mercedes Glc Class so be very careful.
First, you need to know what problem you are facing and especially the severity of it. This can be determined by the behavior of the engine light of your Mercedes Glc Class, according to the different categories listed below. So refer to the right situation to act accordingly.

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Different options when the engine light comes on on your Mercedes Glc Class

Get to the garage as quickly as possible with your Mercedes Glc Class:

  • The engine light comes on and goes off, or flashes : the causes can be various, but you should go check it with a garage.
  • The indicator light comes on and stays on : it most certainly comes from the antipollution system which presents anomalies, you should also go to a garage nearby.

Stop your Mercedes Glc Class as soon as possible and call a mechanic for a tow to the garage, there is no need to take risks while driving with:

  • Engine light stays on and car has performance issues : If a major problem is identified by the on-board computer of your Mercedes Glc Class , security mode is engaged. This gives the opportunity to be able to ride in degraded mode (loss of available power), which saves you more serious problems (engine failure). In this situation, we strongly recommend that you call a garage for your Mercedes Glc Class.
  • The LED stays on AND blinks : This situation is the most dangerous. This implies that the catalytic converter is overheated because it is damaged, which means that at any time it could ignite. Stop your Mercedes Glc Class urgently.

Probable causes of the engine light on your Mercedes Glc Class

The probable causes of failure of the engine management system of your Mercedes Glc Class are various, but categorized into 2 groups:

  • Hardware problem : injection system (vacuum hoses, flowmeter, injection pump, turbo), antipollution / emissions control system (EGR valve, catalytic converter), etc.
  • Electronic problem : defective or disconnected sensor, lambda probe to be changed, computer, etc.

All the causes that may cause the engine light to come on on your Mercedes Glc Class

Then there may be a problem clogged engine injector on your Mercedes Glc Class. We therefore recommend that you clean it. It will operate as usual, but air and / or fuel will have difficulty circulating.

Un faulty injector on your Mercedes Glc Class can potentially send too much fuel and cause excess pollution which will cause clogging of the catalyst (+ FAP (Particle Filter) on diesel).
If ever catalyst of your Mercedes Glc Class was too clogged, (there is no longer the right balance of chemical components to transform the exhaust gases) consequently the warning light will come on.
Same if the injection pump has a specific concern. Its role is to better control the combustion, and therefore the consumption of an engine. Directly linked to the engine, if it were to break down, the warning light on your Mercedes Glc Class would come on as well.
In addition, if your Lambda probe no longer works, it will no longer be able to check the exhaust fumes of your Mercedes Glc Class and the computer will therefore no longer be able to modulate the injection in order to reduce emissions.
If your Mercedes Glc Class has a petrol engine, an ignition problem (coils or spark plugs) can induce an increase in pollution and therefore the engine warning light coming on.
Also, a overheated catalyst (if you drive more aggressively, or the presence of fuel in the exhaust line which heats everything up) can potentially trigger the engine warning light on your Mercedes Glc Class.
Un throttle position sensor (unit which aims to canalyze the volume of air entering the engine) no longer allows the computer to produce a balanced mixture between fuel and oxidizer (an oxidizer is a chemical substance which has the property of allowing the combustion of a A suitable mixture of oxidizer and fuel can cause combustion): Combustion no longer takes place correctly, which destabilizes the engine, which consequently causes the ignition of the engine warning light of your Mercedes Glc Class.

A clogged DPF (Particulate Filter) can also cause the engine warning light to come on, but as a general rule another warning light representing the filter also lights up.
Un poor quality or unsuitable fuel (this sometimes happens with the E10) can cause this warning light to come on on your Mercedes Glc Class. It can then go out on its own once you have driven on another fuel. This can happen following an unusual pump change. If you always take fuel at the same pump, ask the person who manages the gas station.
A clogged motor can cause this light to come on. Indeed, soot can make certain parts of the engine less airtight (eg clogged valves which no longer allow perfect sealing of the cylinders of your Mercedes Glc Class).
A blocked EGR valve (usually by soot) sends too much exhaust gas back into the engine, combustion is therefore disturbed and is no longer under control: the engine warning light on your Mercedes Glc Class comes on.
Also to blame, injector leaks. There are several types, depending on whether your Mercedes Glc Class runs on diesel or petrol: For petrol Mercedes Glc Class, the leak is located on the upper or lower part of the engine injector. As regards the Mercedes Glc Class diesel, the leak may be located at the arrival, the base, or at the level of the injector return hose.
Finally, the injector may also be clogged. If it did, you can clean it yourself. There are different solutions to perform the manipulation. However, the operation can be meticulous, we advise you to seek professional help or replace it if it also shows signs of wear.
Here are the main causes for the engine light on your Mercedes Glc Class to come on, as you have seen, this concerns sensitive parts of your vehicle, do not take any risks with regard to this light, this will sometimes have serious repercussions.