Discovering noises from your auto frequently is never comforting, so discovering noises on your Mercedes Classe A 3 suspensions when you go over a speed bump can be disturbing. This indicator may be a sign of a insignificant problem as well as a warning of a much larger repair to come. Whatever the case, it is fundamental to check the cause and take the necessary actions to solve the problem, it is with this goal in mind that we wanted to write this document to help you see more clearly. We will first see the possible explanations for a crack when the speed bump passes, then, what can be the cause of a squeaking noise when a speed bump is being passed and finally what to do if you have another noise when a speed bump is passed.
Suspension cracking noise Mercedes Classe A 3
Check Mercedes Classe A 3 suspension
If you notice a suspension noise when you pass a speed bump on your Mercedes Classe A 3, and it is categorized by a “clack” or cracking, it is highly plausible that your suspension block is the origin of it. Indeed, it may be the suspension cups, which, when they are outdated, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its function during small bumps that compress the suspensions. To examine if this is the problem that worries you, take a dented road and pay attention to the noise coming from your front axle as you drive over holes. If it is indeed the cups, think of swapping them fairly quickly or you may ruin other parts and have to make more important auto repairs.
Check the cardan shaft
If you are here because you have searched for “Mercedes Classe A 3 suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. Indeed, when the cardan bellows get out of date and the dirt/dust accumulates inside them their action is degraded and it is possible to experience a noise when they are in torsion. To examine this, you can try both types of torsion, first vertical with suspension compressions on the speed bump passages, and horizontal when you are going to turn at low speed. If it cracks in these two situations you should consider replacing it or them. If you have the feeling that this noise is more like a a loud noise on Mercedes Classe A 3, don’t hesitate to visit this document.
Check steering hinges/stabilizer bar
Finally, when you know a suspension noise when your Mercedes Classe A 3 passes over a speed bumps, it is possible that the hinges or the stabilizer bar are responsible. Exactly like the gimbals, the steering part is mobilized when you change direction. If this is the case, the parts that may have been affected by regular wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the origins of your noises, to examine it, put it under the car and apply twists on each of its elements to examine that there is no particular play on one of them, they are supposed to endure you quite strongly over their entire travel. Remember to take your vehicle to your technician or change them if they are involved.
squeaky noise speed bump Mercedes Classe A 3
Check the stabilizer bar
If, alternatively, you have a noise that is more like a squeak when you go over a speed bump with your Mercedes Classe A 3, it is plausible that it is the stabilizer bar itself that is concerned. Indeed, abnormal/pronounced wear of the latter can cause abnormal friction which can generate this squeaking noise. Remember to examine by going under your car the condition of the paint on your bar which will tell us if there is friction. Second plausible explanation, it may be your stabilizer bar silentblocks that are dried out and create noise, in which case remove them from the cradle and grease them, this should fix the problem.
Check engine silentblocks
Finally, last possibility that we can examine together, it is the engine silentblocks, in fact, these silentblocks act as pads/shock absorbers between the engine and the cradle of the auto, a noticable fatigue of these will generate a subsidence and therefore a space between the engine and the silentblocks, it may appear that a squeaking noise occurs when you pass a speed bumps or any holes with your Mercedes Classe A 3. To change them go to your auto technician.
Other speed bump noise Mercedes Classe A 3
If, despite all its assumptions, you still can’t locate the origin of the noise your Mercedes Classe A 3 makes when you pass a speed bump, we suggest you to refer to this article on a loud noise on Mercedes Classe A 3 or to visit your technician in order to carry an in-depth check on your Mercedes Classe A 3 and identify this problem.
