It is never pleasant to experience a noise in your vehicle that you don’t know the source of. So, what if you detect a loud noise that remains on your Mercedes A class? It is extremely possible that this is a minor trouble, but before beeing sure, it is better to carry out some verifications. Whether that loud noise comes from the front of the automobile, from the rear, whether it shows up when you accelerate or when you are parked, our team has made this content to help you fix it. First, we will describe the possible explanations for the issue according to when loud noise shows up on your Mercedes A class, and then we will concentrate on the region of origin of the noise. In any case, if this noise persists, follow these advice to help you find the origin.
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When does my Mercedes A class produce a loud noise?
One way to identify a noise from your Mercedes A class is to establish when it occurs. Indeed, some concerns can be related to components that are only stressed under certain circumstances. It is this method that we will focus on in this first part.
Loud noise Mercedes A class when accelerating
Loud noise on Mercedes A class that appears when you are accelerating can be symptomatic of different failures. In fact, if you feel a noise that is louder and louder when you accelerate, it can come from a faulty turbo that will cause a much higher noise than during normal process. Furthermore, it is also highly possible that loud noise on your Mercedes A class is connected to a wheel bearing, which is one of the most common origins of these types of symptoms. Another alternative is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also possible that the trouble may come from a deformed tire or an unbalanced wheel that will tend to vibrate as it gains speed.
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When my Mercedes A class is stopped
If your Mercedes A class makes a loud noise while not accelerating, engine on, the trouble may be linked to poor air intake. An air intake hose that has come loose or has a hole in it may be the reason.
Where does loud noise come from on my Mercedes A class and how can I be sure of its origin?
Now that we have determined the cause of the noise, we will look into the verification step to ensure that this is the issues you are going through.
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The loud noise comes from the wheels of my Mercedes A class
As we have seen earlier in this article, loud noise from the wheels of your Mercedes A class may be linked to two main problems. If it is one of your tired bearings, it will tend to make a thumping noise that intensifies when it is under stress (spins faster and faster). So keep in mind to verify by driving “fast” (neutral gear on and window open to hear only the noise of the wheels) that the noise is located here, if this is the case replace it or them as soon as possible. If it is a deformed tire, don’t forget to visually check the entire tread area for linearity. If it is the balancing of the wheels of your Mercedes A class that is the problem, you will tend to feel a vibration in the direction of the vehicle as you go faster. In both situations, you will have to go to your mechanic to replace the tires or execute a balancing.
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The loud noise comes from the engine of my Mercedes A class
In case you have identified loud noise as coming from the engine of your Mercedes A class, the two most likely causes are turbo and air intake. In the first case, a turbo failure may also be associated with a compression loss during the engine ramp-up phase, so you should experience a power loss during your acceleration. If the loud noise on your Mercedes A class is related to air intake, the control will be done mainly visually, check all your air intake hoses by a visual control in your engine block to be sure that it is not damaged or disconnected which would generate an air intake, if it is just disconnected you can reconnect the air intake tubes yourself. Then verify that the engine idle speed is not random. In case you confirm one of these two trouble, take your vehicle to your service garage .
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Loud noise comes from the exhaust pipe of the vehicle
If the noise you have recognized comes from the exhaust pipe of your Mercedes A class, it is highly possible that you have rust if your automobile is old and has created holes in it over time and therefore generates a very high noise close to aircraft noise on your Mercedes A class, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To confirm this, get help from someone who will stand under the automobile while you accelerate to find the exact area of origin of this noise. If it is a hole, you can repair it with a putty provided for this purpose, or, if it is a collar, “reattach” it. If it is cut or the hole is too big, it is better to get closer to your mechanic.
