It is never enjoyable to find out a noise in your car that you don’t know the starting point of. So, what if you discover a loud noise that is persistant on your Mercedes Viano? It is extremely plausible that this is a minor issue, but before beeing sure, it is better to complete some verifications. Whether that loud noise comes from the front of the automobile, from the rear, whether it happens when you accelerate or when you are parked, our team has written this article to help you fix it. First, we will point out the possible reasons for the problem according to when loud noise appears on your Mercedes Viano, and then we will concentrate on the region of origin of the noise. In any case, if this noise continues, follow these instructions to help you find the source.
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When does my Mercedes Viano produce a loud noise?
One way to find a noise from your Mercedes Viano is to establish when it appears. Indeed, some problems can be related to components that are only stressed under certain occasions. It is this process that we will focus on in this first part.
Loud noise Mercedes Viano when accelerating
Loud noise on Mercedes Viano 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 create a much higher noise than during normal process. Furthermore, it is also highly plausible that loud noise on your Mercedes Viano is in connection with a wheel bearing, which is one of the most common origins of these types of manifestations. Another alternative is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also plausible that the issue may come from a deformed tire or an unbalanced wheel that will tend to vibrate as it increases speed.
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When my Mercedes Viano is stopped
If your Mercedes Viano makes a loud noise while not accelerating, engine on, the issue may be connected 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 Viano and how can I be sure of its origin?
Now that we have determined the source of the sound, we will focus on the verification step to be certain that this is the concern you are experiencing.
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The loud noise comes from the wheels of my Mercedes Viano
As we have seen before, loud noise from the wheels of your Mercedes Viano may be connected 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 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, remember to visually check the entire tread area for linearity. If it is the balancing of the wheels of your Mercedes Viano that is the issue, you will tend to feel a vibration in the direction of the vehicle as you go faster. In both cases, 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 Viano
In case you have discovered loud noise as coming from the engine of your Mercedes Viano, the two most likely causes are turbo and air intake. In the first case, a turbo failure may also be connected 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 Viano 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 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 disorders, 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 Viano, it is highly plausible 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 Viano, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To ensure this, get help from someone who will stand under the automobile while you accelerate to find the exact area of source 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.
