Hearing noises from your car frequently is never reassuring, so discovering noises on your Mercedes Classe A 4 suspensions when you pass a speed bump can be stressing. 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 important to check the source and take the necessary actions to eliminate the problem, it is with this aim in mind that we wanted to write this content to help you see more clearly. We will first see the possible explanations for a crack when the speed bump passes, after that, what can be the reason 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 4
Check Mercedes Classe A 4 suspension
If you encounter a suspension noise when you pass a speed bump on your Mercedes Classe A 4, and it is categorized by a “clack” or cracking, it is highly plausible that your suspension block is the origin of it. In fact, it may be the suspension cups, which, when they are out of date, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its function during small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 focus on the noise coming from your front axle as you circulate over holes. If it is indeed the cups, think of swapping them as soon as possible or you may ruin other parts and have to make more important repairs.
Check the cardan shaft
If you are here because you have searched for “Mercedes Classe A 4 suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. In fact, when the cardan bellows get old and the dirt/dust accumulates inside them their functions is degraded and it is possible to experience a sound 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 cases 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 4, don’t hesitate to visit this content.
Check steering hinges/stabilizer bar
Finally, when you find out a suspension noise when your Mercedes Classe A 4 passes over a speed bumps, it is plausible that the hinges or the stabilizer bar are responsible. Exactly like the gimbals, the steering part is mobilized when you adjust direction. If this is the case, the parts that may have been destroyed by usual wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the causes of your noises, to examine it, position it under the car and apply twists on each of its components to examine that there is no particular play on one of them, they are supposed to resist you quite strongly over their entire travel. Please remember to take your vehicle to your mechanic or change them if they are involved.
squeaky noise speed bump Mercedes Classe A 4
Check the stabilizer bar
If, alternatively, you have a noise that is more like a squeak when you pass a speed bump with your Mercedes Classe A 4, it is plausible that it is the stabilizer bar itself that is involved. In fact, abnormal/pronounced wear of the latter can cause abnormal friction which can provoke this squeaking noise. Please remember to examine by passing under your car the condition of the paint on your bar which will indicate if there is friction. Second plausible point, it may be your stabilizer bar silentblocks that are dry and cause noise, in which case take them off from the cradle and grease them, this should solve 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 car, a pronounced weakness of these will create a subsidence and therefore a space between the engine and the silentblocks, it may appear that a squeaking noise comes up when you pass a speed bumps or any holes with your Mercedes Classe A 4. To change them go to your auto mechanic.
Other speed bump noise Mercedes Classe A 4
If, despite all its assumptions, you still can’t locate the source of the noise your Mercedes Classe A 4 makes when you pass a speed bump, we advise you to consult this content on a loud noise on Mercedes Classe A 4 or to visit your mechanic in order to carry an in-depth check on your Mercedes Classe A 4 and find this problem.
