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, at least you’ve already had that apprehension. So when you discover an alternator noise on Mercedes Classe B, you can already see yourself breaking down, stuck waiting for the tow truck. That’s why our team has decided to produce this post to help you find the sources of alternator sounds. In this article, you will first learn the role and functions of the alternator in your Mercedes Classe B and then what the causes and solutions to alternator noise on Mercedes Classe B may be.
Role and alternator operation Mercedes Classe B
Alternator role
Your alternator is an essential part of your Mercedes Classe B. In fact, its objective is to provide power to your entire electrical system: headlights, interior lighting, signalling, computer… It will have the task of recharging the battery once the car is in motion, to provide power to the car in motion and to let you to always have a enough energy reserve to be able to restart the next time.
Alternator functioning
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The alternator functions on an electrical principle that has been used for decades, the concept of copper coil wound around a magnet . This coil while rotating generates electricity. It is the engine itself that will give the energy required by the alternator to create the energy, via the accessory belt or alternator belt. When your Mercedes Classe B engine stops, the battery takes over to give the car with energy.
What are the different alternator noises or sounds on my Mercedes Classe B and what are the causes?
I listen to a knocking noise coming from the alternator of my Mercedes Classe B
One of the typical noises of a tired alternator on Mercedes Classe B is a knocking noise. This alternator sound on Mercedes Classe B will most of the time happen when your engine is idling, it can be associated with voltage drops that could disturb the normal operation of electrical components 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 car 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 B is tired and you should think about replacing the bearing if it is the only cause otherwise the complete part.
I discover a grinding noise coming from the alternator of my Mercedes Classe B
If you are in the situation where the alternator of your Mercedes Classe B causes grinding sounds, in this case you will have to look into it more seriously. This warning sign can testify as for the knocking sound of a tired bearing, however , in general, we generally see by looking more carefully that it is the accessory belt that is loosened or worn and is therefore the cause of it. In this case, we suggest that you read this article to find all the necessary information to solve an accessory belt noise on Mercedes Classe B.
I discover a loud noise from the alternator of my Mercedes Classe B
Hearing a loud noise from the alternator of your Mercedes Classe B is quite normal, in fact, it produces an audible sound when creating 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 suggest that you look into this article to find other ways to solve problem of noises from front end on Mercedes Classe B.
