Who hasn’t found himself in the situation where his car doesn’t start one morning on the way to work? If that didn’t happen to you, certainly you’ve already had that fear. So when you discover an alternator noise on Mercedes Benz M Class, you can already imagine yourself breaking down, stuck waiting for the tow truck. That’s why our team has decided to produce this article to help you find the origins of alternator sounds. In this article, you will first discover the role and operation of the alternator in your Mercedes Benz M Class and then what the causes and solutions to alternator noise on Mercedes Benz M Class may be.
Role and alternator operation Mercedes Benz M Class
Alternator role
Your alternator is an essential part of your Mercedes Benz M Class. In fact, its task is to generate power to your entire electrical system: headlights, interior lighting, signalling, computer… It will have the goal of charging the battery once the car is in motion, to provide power to the car in motion and to let 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 spinning creates electricity. It is the engine motor itself that will provide the energy needed by the alternator to produce the energy, via the accessory belt or alternator belt. When your Mercedes Benz M Class engine stops, the battery takes over to provide the car with energy.
What are the different alternator noises or sounds on my Mercedes Benz M Class and what are the causes?
I discover a knocking noise from the alternator of my Mercedes Benz M Class
One of the characteristic noises of a tired alternator on Mercedes Benz M Class is a knocking noise. This alternator sound on Mercedes Benz M Class will generally appear when your engine is idling, it can be linked to voltage drops that could disturb the normal operation of electrical elements such as headlights for example. In general, it is a of both bearings of the alternator that is malfunctioning, to examine it, use a multimeter on the terminals of your car with the engine running and you must obtain a value between 12 and 14.7 volts, which means that your alternator is charging your battery well. If the value is lower, the alternator of your Mercedes Benz M Class is tired and you should think about replacing the bearing if it is the only cause otherwise the entire part.
I discover a grinding noise coming from the alternator of my Mercedes Benz M Class
If you are in the case where the alternator of your Mercedes Benz M Class produces grinding sounds, in this circumstance you will have to look into it more seriously. This indicator can testify as for the knocking sound of a tired bearing, however , in general, we generally realise by looking more strongly that it is the accessory belt that is loosened or worn and is therefore the cause of it. In this circumstance, we advise that you read this document to find all the necessary details to solve an accessory belt noise on Mercedes Benz M Class.
I discover a loud noise from the alternator of my Mercedes Benz M Class
Listening a loud noise from the alternator of your Mercedes Benz M Class is quite normal, in fact, it produces an audible sound when producing the electrical pulses it generates. It is up to you to examine that the battery indicator light on your dashboard does not show up, 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 take a look at this document to find other ways to solve problem of noises from front end on Mercedes Benz M Class.
