Who hasn’t found himself in the situation where his car doesn’t start one morning on the way to work? If it never happened to you , certainly you’ve already had that fear. So when you listen to an alternator noise on Mercedes Classe S, you can already imagine yourself breaking down, stuck waiting for the tow truck. That’s why our team has decided to write this content to help you locate the sources of alternator sounds. In this article, you will first see the role and functions of the alternator in your Mercedes Classe S and then what the causes and solutions to alternator noise on Mercedes Classe S may be.
Role and alternator operation Mercedes Classe S
Alternator role
Your alternator is an important part of your Mercedes Classe S. In fact, its goal is to generate power to your entire electrical system: headlights, interior lighting, signalling, computer… It will have the mission of recharging the battery once the vehicle is in motion, to provide power to the vehicle in motion and to allow you to always have a sufficient energy source to be able to restart the next time.
Alternator functioning
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The alternator operates on an electrical principle that has been used for decades, the principle of copper coil wound around a magnet . This coil while rotating generates electricity. It is the engine motor itself that will provide the energy requested by the alternator to generate the energy, via the accessory belt or alternator belt. When your Mercedes Classe S engine stops, the battery takes over to provide the vehicle with energy.
What are the several alternator noises or sounds on my Mercedes Classe S and what are the causes?
I notice a knocking noise caused by the alternator of my Mercedes Classe S
One of the characteristic noises of a tired alternator on Mercedes Classe S is a knocking noise. This alternator sound on Mercedes Classe S will most of the time show up when your engine is idling, it can be associated with voltage drops that could disturb the normal operation of electrical elements such as headlights for example. In many cases, it is a of both bearings of the alternator that is defective, to verify it, use a multimeter on the terminals of your vehicle with the engine running and you must get a value between 12 and 14.7 volts, which means that your alternator is recharging your battery well. If the value is lower, the alternator of your Mercedes Classe S is tired and you should think about replacing the bearing if it is the only reason otherwise the entire part.
I listen to a grinding noise coming from the alternator of my Mercedes Classe S
If you are in the situation where the alternator of your Mercedes Classe S produces grinding sounds, in this case you will have to look at it more seriously. This symptom can testify as for the knocking sound of a tired bearing, but in most cases, we often see by looking more carefully that it is the accessory belt that is loosened or worn and is therefore the reason of it. In this case, we advise that you read this content to find all the necessary information to solve an accessory belt noise on Mercedes Classe S.
I listen to a loud noise from the alternator of my Mercedes Classe S
Experiencing a loud noise from the alternator of your Mercedes Classe S is quite regular, in fact, it produces an audible sound when producing the electrical pulses it generates. It is up to you to verify that the battery indicator light on your dashboard does not appear, and that you do not have a voltage drop when your engine is running (headlight or dashboard light that jumps for example. If this noise is too loud, we advise that you check out this content to find other ways to solve problem of noises from front end on Mercedes Classe S.
