Being subject to regular noise on your car tends to be irritating, a car is so elaborate that it is constantly difficult to situate its origin and even more so to find the part that generates it. If you have already experienced a clicking noise on your Mercedes Classe A 4, we will most likely be able to support you. Indeed, our editorial staff decided to compose this article in order to review the main causes of a clicking noise on Mercedes Classe A 4. This is why, firstly, we will see what are the reasons of this type of noise coming from your engine block, then those of a noise coming from your direction and finally, the sources of clicking noise on Mercedes Classe A 4 coming from your suspensions.
I hear a clicking noise on Mercedes Classe A 4 from my engine
Check your high engine
If you hear a clicking noise on Mercedes Classe A 4, and this noise is based at the top of the engine, it means that it comes from your cylinder head and its associated parts. Two parts can be the causes of these ticking noises on Mercedes Classe A 4. Either the hydraulic pushers , in general it is because of their faulty “hydraulic catch-up” system that we will perceive these clicking noises, generally when cold and go away when hot. Otherwise, it is the interplay of your rocker arms or their state of wear that is at issue. In this case, remember to change them.
Check your low engine
If you have founded the region of origin of the Mercedes Classe A 4 clikcing noises coming from your low engine, it may be that your rods or piston shafts are the causes. In both circumstances, the risk in the long term is the breakage of the motor. These two maintenance are very difficult and most mechanics will suggest you to change the engine of your Mercedes Classe A 4.
Combustion problem
Finally, if you have the feeling that this clicking noise on Mercedes Classe A 4 is connected to the combustion of your engine, there are three possible triggers of it. Check the state of your glow plugs which, if worn, can hinder the proper combustion of the fuel mixture. Then, it is possible 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 injured. In this circumstance, do not hesitate to check this article which deals in detail with the different injection sounds on Mercedes Classe A 4.
I hear a clicking noise on Mercedes Classe A 4 in my direction
Check the state of the gimbals
One of the most regular triggers of a clicking noises in the direction of your Mercedes Classe A 4 is linked to 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 create a ticking type of sound when you approach the stop zone of your steering. A bellows with holes will affect the cardan shaft very quickly and must be replaced rapidly, otherwise the entire cardan shaft will have to be replaced. Consider taking a look at it. If you would like more detailed information about gimbals noises on Mercedes Classe A 4, do not hesitate to consult this complete guide.
Check the rest of your direction
Finally, when you recognise a clicking noise on your Mercedes Classe A 4, it is possible 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 hear a clicking noise on Mercedes Classe A 4 coming from my suspensions
Check the suspension
If you experience a clicking noise on your Mercedes Classe A 4 when you pass a speed bump, it is highly possible that your suspension block is the cause of the noise. Indeed, it may be the suspension cups, which, when they are dead, have the rubber (silentbloc) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its task and during small jolts that compress the suspensions. To verify if this is the trouble that concerns you, take a dented road and, at low speed, listen to the noise coming from your front axle when you pass over holes. If these are the cups, consider changing them as soon as possible as this may affect other parts and require more expensive repairs.
Check spring and cylinder
If you detect a clicking noise on your Mercedes Classe A 4 at the suspension level, it is highly possible that spring wear or shock cylinder deformation may be a cause. To verify the shape of the spring, position the vehicle on a flat surface and measure that the heights from the ground to the bottom of the body are identical on each side (empty car for measurement). You can also verify between the front and rear, if there is a gap too large it denotes that most likely your springs are worn, if you see a leak go a little further in the article to have the solution to this problem. For the cylinder the verification is visual, be sure 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 think about changing it or them. If you have the feeling that this noise is more like a squeaking noise on Mercedes Classe A 4 than a clicking noise, don’t hesitate to consult this article.
