What can be more disturbing than noises when you start your vehicle… Indeed, you maybe previously noticed noises when you start your Mercedes Classe C 3 and generally it’s frustrating. It could not be anything significant, 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 team has made the decision to create this content page to support you find its origin. To do this, first, we will see the case of noise when starting on Mercedes Classe C 3 but the vehicle does not start, and finally, the noise you can feel on your vehicle if it starts, first cold and then hot.
I hear a noise when I try to start my Mercedes Classe C 3, but the engine doesn’t start
I find a clicking noise at the start of my Mercedes Classe C 3
If you hear 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 issue. Indeed, if you notice clicking noise when you start your Mercedes Classe C 3, and it sounds like a ticking, you most likely lack the energy to run your starter, test your battery with a voltmeter and swap it if required. In the case that after verifying your battery, you still encounter a noise when starting your Mercedes Classe C 3 and it does not want to start, browse this article about starter motor noises on Mercedes Classe C 3 for more info and to find the source of your issue.
I experience a noise when I start my Mercedes Classe C 3 but the engine it starts
I hear a noise when I start my Mercedes Classe C 3
- Grinding or squealing type noises when I start cold Mercedes Classe C 3 :
If you hear a noise when you start your Mercedes Classe C 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 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 state of your injectors and air intake system. For more info on the source of injection-related noises on Mercedes Classe C 3, see this article. - Cold start friction parts Mercedes Classe C 3 :
If you experience cold friction noises on Mercedes Classe C 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 verify your belt and swap it if needed. If you have other friction noises, and it doesn’t come from your serpentine belt, we have a full article on engine of your Mercedes Classe C 3.
I hear a noise when starting my Mercedes Classe C 3 even when hot
- rubber mount / silent bloc dead motor
If you hear a clacking noise 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 good to be replaced. And the huge vibrations made by starting the engine can create starting noise on Mercedes Classe C 3. Check their state and replace them if needed. Read this article if you would like to have detailed info on rubber mount noises on Mercedes Classe C 3. - Motor flywheel
Finally, if you have a noise that sounds a little like a crank noise when you start your Mercedes Classe C 3, even when hot, it is possible 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 cars. When they take part in the game they produce noise when you start your Mercedes Classe C 3 and when you turn off the engine. Have his state checked by a mecanist.
