It is never relaxing to perceive a noise in your vehicle that you don’t know the origin of. So, what if you recognize a loud noise that lasts on your Mercedes C class? It is highly possible that this is a minor problem, but before beeing sure, it is better to execute some inspections. Whether that loud noise comes from the front of the vehicle, from the rear, whether it shows up when you accelerate or when you are parked, our team has made this article to help you solve it. First, we will detail the possible reasons for the problem according to when loud noise appears on your Mercedes C class, and then we will give attention to the region of origin of the noise. In any case, if this noise continues, follow these suggestions to help you find the origin.
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When does my Mercedes C class produce a loud noise?
One way to discover a noise from your Mercedes C class is to define when it shows up. Indeed, some problems can be connected to components that are only stressed under certain types of conditions. It is this method that we will focus on in this first part.
Loud noise Mercedes C class when accelerating
Loud noise on Mercedes C class that starts when you are accelerating can be symptomatic of multiple failures. Indeed, if you experience 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. Additionally, it is also highly possible that loud noise on your Mercedes C class is associated with a wheel bearing, which is one of the most common causes of these types of signs of illness. Another alternative is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also possible that the problem 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 C class is stopped
If your Mercedes C class makes a loud noise while not accelerating, engine on, the problem may be linked to poor air intake. An air intake hose that has come loose or has a hole in it may be the cause.
Where does loud noise come from on my Mercedes C class and how can I be sure of its origin?
Now that we have determined the source of the noise, we will deal with the verification step to be certain that this is the issues you are having.
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The loud noise comes from the wheels of my Mercedes C class
As we have seen previously, loud noise from the wheels of your Mercedes C class may be linked to two main trouble. 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 bear 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 change it or them right away. 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 C class that is the issue, you will tend to feel a vibration in the direction of the car as you go faster. In both circumstances, you will have to go to your auto technician to swap the tires or accomplish a balancing.
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The loud noise comes from the engine of my Mercedes C class
In case you have recognized loud noise as coming from the engine of your Mercedes C class, the two most likely causes are turbo and air intake. In the first case, a turbo failure may also be connected to 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 C class is related to air intake, the check 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 cause 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 problems, take your car to your mechanic .
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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 C class, it is highly possible that you have rust if your vehicle is old and has created holes in it over time and therefore generates a very high noise close to aircraft noise on your Mercedes C 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 vehicle 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.
