What can be more distressing than noises when you start your car… Indeed, you maybe previously perceived noises when you start your Mercedes Classe B 3 and in general it’s frustrating. It could not be anything critical, but each new engine starts usually becomes a scary moment during which you don’t know if your engine will start. That is why our editorial staff has chosen to compose this content to help you find its source. To do this, first, we will see the case of noise when starting on Mercedes Classe B 3 but the car does not start, and finally, the noise you can experience on your car if it starts, first cold and then hot.
I experience a noise when I try to start my Mercedes Classe B 3, but the engine doesn’t start
I perceive a clicking noise at the start of my Mercedes Classe B 3
If you experience a noise when you want to start your car, and it does not want to turn on, it is likely that it is the battery that is contributing to the trouble. Indeed, if you acknowledge clicking noise when you start your Mercedes Classe B 3, and it sounds like a ticking, you almost certainly lack the energy to run your starter, test your battery with a voltmeter and swap it if required. In case that after examining your battery, you still know a noise when starting your Mercedes Classe B 3 and it does not want to start, browse this content page about starter motor noises on Mercedes Classe B 3 for more details and to locate the origin of your trouble.
I notice a noise when I start my Mercedes Classe B 3 but the engine it starts
I experience a noise when I start my Mercedes Classe B 3
- Grinding or squealing type noises when I start cold Mercedes Classe B 3 :
If you experience a noise when you start your Mercedes Classe B 3, and this noise is like grinding or squealing noise, which can also be relating to vibrations, it is possible that it is the combustion of your car that is involved. Indeed if you have an air/fuel mixture that is not good the normal general performance of the engine will be altered. Examine the state of your injectors and air intake system. For more details on the origins of injection-related noises on Mercedes Classe B 3, see this piece of content. - Cold start friction parts Mercedes Classe B 3 :
If you encounter cold friction noises on Mercedes Classe B 3, it is pretty much certain that they come from one of your belts. Either the serpentine belt starts to wear out and therefore causes a friction noise. It is also possible that the tensioner roller or damper pulley is worn out and that as a result the extension belt provoke a friction noise, often when cold. Visually check your belt and swap it if needed. If you have other friction noises, and it doesn’t originate from your serpentine belt, we have a full content page on engine of your Mercedes Classe B 3.
I experience a noise when starting my Mercedes Classe B 3 even when hot
- rubber mount / silent bloc dead motor
If you experience a clacking noise just when you start your car’s engine and it is more than 100,000 km long, it is possible that some of your engine silentblocks or rubber mounts are expired. And the huge vibrations generated by starting the engine can make starting noise on Mercedes Classe B 3. Examine their state and replace them if needed. Browse this content page if you would like to have detailed details on rubber mount noises on Mercedes Classe B 3. - Motor flywheel
Finally, if you have a noise that sounds a little like a crank noise when you start your Mercedes Classe B 3, even when hot, it is possible that if your series is equipped with a dual-mass flywheel, it is the origin of your concerns. Indeed, these parts have created a lot of concerns on many cars. When they take part in the game they make noise when you start your Mercedes Classe B 3 and when you turn off the engine. Have his state checked by a specialist.
