What can be more frustrating than noises when you start your vehicle… Indeed, you maybe previously perceived noises when you start your Mercedes Classe B and generally it’s frustrating. It might not be anything serious, but each new engine starts usually will turn into a scary moment during which you don’t know if your engine will start. That is why our editorial staff has decided to produce this document to support you find its source. To do this, first, we will see the case of noise when starting on Mercedes Classe B but the vehicle does not start, and finally, the noise you can encounter on your vehicle if it starts, first cold and then hot.
I perceive a noise when I try to start my Mercedes Classe B, but the engine doesn’t start
I pay attention to a clicking noise at the start of my Mercedes Classe B
If you perceive a noise when you want to start your vehicle, and it does not want to turn on, it is likely that it is the battery that is contributing to the problem. Indeed, if you notice clicking noise when you start your Mercedes Classe B, and it sounds like a ticking, you almost certainly lack the energy to run your starter, test your battery with a voltmeter and replace it if necessary. In case that after verifying your battery, you still experience a noise when starting your Mercedes Classe B and it does not want to start, refer to this content page about starter motor noises on Mercedes Classe B for more info and to find the source of your problem.
I perceive a noise when I start my Mercedes Classe B but the engine it starts
I perceive a noise when I start my Mercedes Classe B
- Grinding or squealing type noises when I start cold Mercedes Classe B :
If you perceive a noise when you start your Mercedes Classe B, and this noise looks like grinding or squealing noise, which can also be relating to vibrations, it is plausible that it is the combustion of your vehicle that is involved. Indeed if you have an air/fuel mixture that is not good the normal performance of the engine will be altered. Check the condition of your injectors and air intake system. For more info on the source of injection-related noises on Mercedes Classe B, browse this piece of content. - Cold start friction parts Mercedes Classe B :
If you discern cold friction noises on Mercedes Classe B, it is pretty much sure that they come from one of your belts. Either the serpentine belt starts to wear out and therefore triggers a friction noise. It is also plausible that the tensioner roller or damper pulley is worn out and that as a result the extension belt triggers a friction noise, often when cold. Visually check your belt and replace it if needed. If you have other friction noises, and it doesn’t come from your serpentine belt, we have a full content page on engine of your Mercedes Classe B.
I perceive a noise when starting my Mercedes Classe B even when hot
- rubber mount / silent bloc dead motor
If you perceive a clacking noise just when you start your car’s engine and it is more than 100,000 km long, it is plausible that some of your engine silentblocks or rubber mounts are good to be swapped. And the huge vibrations made by starting the engine can make starting noise on Mercedes Classe B. Check their condition and replace them if needed. Read this content page if you would like to have detailed info on rubber mount noises on Mercedes Classe B. - Motor flywheel
Finally, if you discern a noise that sounds a little like a crank noise when you start your Mercedes Classe B, even when hot, it is plausible that if your series is equipped with a dual-mass flywheel, it is the source of your trouble. Indeed, these parts have created a lot of trouble on many automobiles. When they take part in the game they make noise when you start your Mercedes Classe B and when you turn off the engine. Have his condition examined by a mecanist.
