Discovering noises from your vehicle often is never comforting, so hearing noises on your Mercedes Classe C suspensions when you go over a speed bump can be disturbing. This symptom may be a sign of a minor problem as well as a warning of a much larger repair to come. In any case, it is essential to check the cause and take the necessary actions to eliminate the problem, it is with this intention in mind that we wanted to write this document to help you see more clearly. We will first see the possible causes for a crack when the speed bump passes, after that, 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 C
Check Mercedes Classe C suspension
If you encounter a suspension noise when you pass a speed bump on your Mercedes Classe C, and it is categorized by a “clack” or cracking, it is highly plausible that your suspension block is the cause of it. Indeed, it may be the suspension cups, which, when they are out of date, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its job during small bumps that compress the suspensions. To verify if this is the problem that worries you, take a dented road and listen to the noise coming from your front axle as you go over holes. If it is indeed the cups, think of replacing them fairly quickly or you may damage other parts and have to make more important repairs.
Check the cardan shaft
If you are here because you have looked for for “Mercedes Classe C 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 Indeed, when the cardan bellows get outdated and the dirt/dust builds up inside them their functions is degraded and it is possible to experience a sound when they are in torsion. To verify 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 C, don’t hesitate to refer to this article.
Check steering hinges/stabilizer bar
Finally, when you detect a suspension noise when your Mercedes Classe C passes over a speed bumps, it is possible that the hinges or the stabilizer bar are responsible. Simply 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 causes of your noises, to verify it, place it under the car and apply twists on each of its elements to verify that there is no particular play on one of them, they are meant to endure you quite strongly over their entire travel. Remember to take your Mercedes Classe C to your auto technician or change them if they are involved.
squeaky noise speed bump Mercedes Classe C
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 C, it is plausible that it is the stabilizer bar itself that is involved. Indeed, abnormal/pronounced wear of the latter can cause abnormal friction which can provoke this squeaking noise. Bear in mind to verify by passing under your car the condition of the paint on your bar which will reveal if there is friction. Second plausible explanation, it may be your stabilizer bar silentblocks that are dried out and create noise, in which case take them off from the cradle and grease them, this should eliminate the problem.
Check engine silentblocks
Finally, last case that we can verify together, it is the engine silentblocks, actually, these silentblocks operate as pads/shock absorbers between the engine and the cradle of the vehicle, a pronounced weakness of these will generate a subsidence and therefore a space between the engine and the silentblocks, it may appear that a squeaking noise appears when you pass a speed bumps or any holes with your Mercedes Classe C. To replace them go to your technician.
Other speed bump noise Mercedes Classe C
If, even though all its assumptions, you still can’t find the origin of the noise your Mercedes Classe C makes when you pass a speed bump, we suggest you to consult this article on a loud noise on Mercedes Classe C or to visit your auto technician in order to carry an in-depth check on your Mercedes Classe C and discover this problem.
