Did you ever had this trouble trying to start your car in the morning and it doesn’t work ? If it never happened to you , at least you’ve already had that apprehension. So when you listen to an alternator noise on Mercedes Classe B 2, you can already imagine yourself breaking down, stuck awaiting the tow truck. That’s why our team has decided to produce this post to support 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 B 2 and then what the causes and solutions to alternator noise on Mercedes Classe B 2 may be.
Role and alternator operation Mercedes Classe B 2
Alternator role
Your alternator is an vital component of your Mercedes Classe B 2. In fact, its task is to give 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 enough energy reserve 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 concept of copper coil wound around a magnet . This coil while spinning makes electricity. It is the engine itself that will furnish the energy needed by the alternator to create the energy, via the accessory belt or alternator belt. When your Mercedes Classe B 2 engine stops, the battery takes over to furnish the vehicle with energy.
What are the distinctive alternator noises or sounds on my Mercedes Classe B 2 and what are the causes?
I listen to a knocking noise from the alternator of my Mercedes Classe B 2
One of the characteristic noises of a tired alternator on Mercedes Classe B 2 is a knocking noise. This alternator sound on Mercedes Classe B 2 will most of the time occur 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 general, it is a of both bearings of the alternator that is defective, to check 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 B 2 is tired and you should think about swapping the bearing if it is the only cause otherwise the whole part.
I listen to a grinding noise coming from the alternator of my Mercedes Classe B 2
If you are in the situation where the alternator of your Mercedes Classe B 2 produces grinding sounds, in this case you will have to check it more seriously. This sign can testify as for the knocking sound of a tired bearing, however , generally, we often 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 case, we advise that you look for advice this document to find all the necessary details to solve an accessory belt noise on Mercedes Classe B 2.
I listen to a loud noise from the alternator of my Mercedes Classe B 2
Finding out a loud noise from the alternator of your Mercedes Classe B 2 is quite common, in fact, it emits an audible sound when creating the electrical pulses it generates. It is up to you to check 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 have a look this document to find other ways to solve problem of noises from front end on Mercedes Classe B 2.
