Being subject to constant noise on your car tends to be irritating, a car is so elaborate that it is constantly difficult to determine its origin and even more so to find the part that causes it. If you have already experienced a clicking noise on your Mercedes Classe A, we will almost certainly be able to help you. Indeed, our editorial staff decided to write this content page in order to review the main causes of a clicking noise on Mercedes Classe A. This is why, firstly, we will see what are the origins of this type of noise coming from your engine block, then those of a noise coming from your direction and finally, the origins of clicking noise on Mercedes Classe A coming from your suspensions.
I find out a clicking noise on Mercedes Classe A from my engine
Examine your high engine
If you find out a clicking noise on Mercedes Classe A, and this sound is located at the top of the engine, it means that it originates from your cylinder head and its associated parts. Two elements can be the triggers of these ticking noises on Mercedes Classe A. Either the hydraulic pushers , in general it is because of their faulty “hydraulic catch-up” system that we will hear these clicking noises, generally when cold and disappear when hot. Otherwise, it is the interplay of your rocker arms or their state of wear that is at issue. In this situation, remember to change them.
Examine your low engine
If you have distinguished the zone of source of the Mercedes Classe A clikcing noises coming from your low engine, it may be that your rods or piston shafts are the triggers. In both cases, the risk in the long term is the breakage of the motor. These two repairs are very complex and most mechanics will suggest you to swap the engine of your Mercedes Classe A.
Combustion problem
Finally, if you have the feeling that this clicking noise on Mercedes Classe A is related to the combustion of your engine, there are three possible triggers of it. Examine the condition of your glow plugs which, if worn, can hinder the proper combustion of the fuel mixture. Then, it is plausible that your timing belt is shifted and that it does not properly manage the timing of the various engine parts to promote good combustion. And finally, the most classic reason, comes from your injection, which is either blocked or one or more injectors are destroyed. In this circumstance, do not hesitate to consult this content page which deals in detail with the different injection sounds on Mercedes Classe A.
I find out a clicking noise on Mercedes Classe A in my direction
Examine the condition of the gimbals
One of the most common causes of a clicking noises in the direction of your Mercedes Classe A is linked with the direction of the car. Indeed, the cardans and their bellows are parts that are constantly stressed during your changes of direction or that you turn your wheels and a wear of one of them can make a ticking type of sound when you approach the stop zone of your steering. A bellows with holes will harm the cardan shaft very quickly and must be swapped in a short time, otherwise the entire cardan shaft will have to be swapped. Consider taking a look at it. If you would like more detailed information about gimbals noises on Mercedes Classe A, do not hesitate to read this complete guide.
Examine the rest of your direction
Finally, when you find out a clicking noise on your Mercedes Classe A, it is plausible that it is the direction that is involved. Just like the gimbals, the steering part is mobilized when you turn your wheels. If this is the circumstance, the parts that may have been damaged due to normal wear and tear or impact (e. g. sidewalks) are steering rods, stabilizer bar silentblocks or steering triangles.
I find out a clicking noise on Mercedes Classe A coming from my suspensions
Examine the suspension
If you encounter a clicking noise on your Mercedes Classe A once you pass a speed bump, it is extremely plausible that your suspension block is the reason of the sound. Indeed, it may be the suspension cups, which, when they are out of date, have the rubber (silentbloc) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its role and during small jolts that compress the suspensions. To check if this is the issue that worries you, take a dented road and, at low speed, listen to the sound originating from your front axle when you pass over holes. If these are the cups, consider changing them quickly as this may damage other parts and require more expensive repairs.
Check spring and cylinder
If you notice a clicking noise on your Mercedes Classe A at the suspension level, it is widely plausible that spring wear or shock cylinder deformation may be a explanation. To check the condition of the spring, position the car on a flat surface and measure that the heights from the ground to the bottom of the body are similar on each side (empty car for measurement). You can also check between the front and rear, if there is a gap too significant it means that most likely your springs are worn, if you find out a leak go a little further in the article to have the answer to this problem. For the cylinder the verification is visual, ensure that it seems to work in a straight axis. And that there is no angle that would alter its proper functioning. If one of them breaks in both situations, you should consider changing it or them. If you have the feeling that this noise is more like a squeaking noise on Mercedes Classe A than a clicking noise, don’t hesitate to consult this article.
