It is never pleasant to perceive a sound you don’t know about, and which will arrive from your car. So, what if you identify an exhaust noise that continues on your Mercedes Classe B? It is highly probable that this is a minimal issue, however, before being sure, it is better to carry out some checks. Our team has created this to support you fix it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Mercedes Classe B and second, if you have a metallic rattling noise on your Mercedes Classe B.
Muffled exhaust noise Mercedes Classe B
Exhaust pipe with holes Mercedes Classe B
Having a muffled sound from its exhaust is not insignificant and can cause over-consumption, or a malfunction of the engine unit, which could finally become dirty, for example. If you have an exhaust noise on your Mercedes Classe B, it is plausible that it is due to a crack in the exhaust pipe, this is the most common explanation. In order to validate this, position somebody under the running motor car and accelerate to help them find the starting point of the hole. Once identified, if it is not too large you can cold seal it with specific metallic mastic type legs. Otherwise, the section will have to be swapped.
Element dislocated exhaust pipe Mercedes Classe B
The other possibility of being suffering from a muffled exhaust noise on Mercedes Classe B is to have a part of the exhaust unit that has dislocated due to vibrations for example. Indeed some junctions of the different parts of the pot can loosen with time and cause an exhaust gas leak in places not intended for this goal. These fumes will then produce a loud noise. Same technique as above, we go under the Mercedes Classe B to discover the issue place, and tighten or change the bolts. If you hear a muffled sound but after checking it doesn’t seem to come from the pot itself, consider having a look at this content page which gives solutions gives solutions about rear end noises on Mercedes Classe B.
Metal rattling exhaust sound Mercedes Classe B
Damaged exhaust muffler noise Mercedes Classe B
If, alternatively, you are subject to an exhaust sound that is more of a metallic sort of, it is plausible that one or more parts of your exhaust may be damaged. Indeed, it is possible that either your baffles, the catalyst or the silencer are the reason of this noise. To confirm, go under your Mercedes Classe B, cold, and tap each of the previously stated parts with a hammer to discover the source of the noise. You should move things between things in the problematic part, if they are baffles, you can try to push the section a little bit to try to block them and thus limit their movements. If it is a dead catalyst, it will be necessary to consider changing it, as well as the silencer. In this case, to stop the exhaust noise on your Mercedes Classe B, you will either have to find a second hand one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise Mercedes Classe B : Silentblock, loose pot
Finally, a metallic exhaust noise on your Mercedes Classe B may be in connection with a poor attachment of your exhaust to your car. Indeed, over the years, vibrations, the pot fasteners on the car chassis can come off. In this case, you need to examine, when cold, that the pot holds well, to try to get it to move in different directions and watch how it behaves. Backwards there should be some play and be able to move but not too much. The closer you get to the engine motor, the more fixed it should be. Visually examine the fasteners for which you have doubts. Finally, it is possible that a silentbloc may have died . In this case it will have to be swapped.
