It is rarely pleasing to hear a sound you don’t know about, and which comes from your car. So, what if you detect an exhaust noise that persists on your Mercedes Benz CLS Class? It is highly probable that this is a minor problem, however, before being sure, it is better to execute some inspections. Our team has created this to support you solve it. First, we will look at the possible reasons if you have a muffled exhaust sound on your Mercedes Benz CLS Class and second, if you have a metallic rattling noise on your Mercedes Benz CLS Class.
Muffled exhaust noise Mercedes Benz CLS Class
Exhaust pipe with holes Mercedes Benz CLS Class
Having a muffled sound from its exhaust is not insignificant and can end in over-consumption, or a malfunction of the engine, which could after a while become dirty, for example. If you have an exhaust noise on your Mercedes Benz CLS Class, it is possible that it is due to a hole in the exhaust pipe, this is the most regular cause. In order to validate this, position a friend or relative under the running motor vehicle and accelerate to help them recognize the source of the hole. Once located, if it is not too large you can cold seal it with specific metallic mastic type legs. Otherwise, the section will have to be changed.
Element dislocated exhaust pipe Mercedes Benz CLS Class
The other possibility of being confronted with a muffled exhaust noise on Mercedes Benz CLS Class is to have a part of the exhaust system that has dislocated as a consequence of vibrations for example. In fact 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 generate a loud noise. Same technique as above, we go under the Mercedes Benz CLS Class to establish the problem location, and tighten or swap the bolts. If you hear a muffled sound but after verifying it doesn’t seem to come from the pot itself, consider taking a look at this content page which gives answers gives solutions about rear end noises on Mercedes Benz CLS Class.
Metal rattling exhaust sound Mercedes Benz CLS Class
Damaged exhaust muffler noise Mercedes Benz CLS Class
If, alternatively, you are subject to an exhaust sound that is more of a metallic type, it is possible that one or more parts of your exhaust may be weakened. Indeed, it is possible that either your baffles, the catalyst or the silencer are the reason of this noise. To be sure, go under your Mercedes Benz CLS Class, cold, and tap each of the previously stated parts with a hammer to establish the origin 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 Benz CLS Class, you will either have to find a resale one and do it yourself, or go to your auto mechanic.
Metal rattling exhaust noise Mercedes Benz CLS Class : Silentblock, loose pot
Finally, a metallic exhaust noise on your Mercedes Benz CLS Class may be connected to a poor attachment of your exhaust to your vehicle. In fact, as time passes, vibrations, the pot fasteners on the vehicle 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 responds. Backwards there should be some play and be able to move but not too much. The closer you get to the engine unit, 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 changed.
