What could possibly be more annoying than noises when you start your vehicle… In fact, you maybe previously found out noises when you start your Mercedes Classe M and in general it’s frustrating. It may not be anything serious, 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 made the decision to prepare this document to support you find its source. To do this, first, we will see the case of noise when starting on Mercedes Classe M but the vehicle does not start, and finally, the noise you can experience on your vehicle if it starts, first cold and then hot.
I listen a noise when I try to start my Mercedes Classe M, but the engine doesn’t start
I notice a clicking noise at the start of my Mercedes Classe M
If you listen a noise when you want to start your vehicle, and it does not want to turn on, it is most likely that it is the battery that is contributing to the issue. In fact, if you notice clicking noise when you start your Mercedes Classe M, and it sounds like a ticking, you most likely lack the energy to run your starter, test out your battery with a voltmeter and swap it if necessary. In the event that after checking your battery, you still experience a noise when starting your Mercedes Classe M and it does not want to start, consult this article about starter motor noises on Mercedes Classe M for more info and to discover the source of your issue.
I listen a noise when I start my Mercedes Classe M but the engine it starts
I listen a noise when I start my Mercedes Classe M
- Grinding or squealing type noises when I start cold Mercedes Classe M :
If you listen a noise when you start your Mercedes Classe M, and this noise looks like grinding or squealing noise, which can also be linked to vibrations, it is conceivable that it is the combustion of your vehicle that is involved. In fact if you have an air/fuel mixture that is not good the normal general performance of the engine will be altered. Check the condition of your injectors and air intake system. For more info on the origin of injection-related noises on Mercedes Classe M, see this piece of content. - Cold start friction parts Mercedes Classe M :
If you experience cold friction noises on Mercedes Classe M, it is almost sure 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 conceivable that the tensioner roller or damper pulley is worn out and that as a result the extension belt make a friction noise, often when cold. Visually examine your belt and swap it if required. 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 M.
I listen a noise when starting my Mercedes Classe M even when hot
- rubber mount / silent bloc dead motor
If you listen a clacking noise just as you start your car’s engine and it is more than 100,000 km long, it is conceivable that some of your engine silentblocks or rubber mounts are good to be swapped. And the huge vibrations made by starting the engine can create starting noise on Mercedes Classe M. Check their condition and replace them if required. Read this article if you would like to have detailed info on rubber mount noises on Mercedes Classe M. - Motor flywheel
Finally, if you have a noise that sounds a little like a crank noise when you start your Mercedes Classe M, even when hot, it is conceivable that if your series is equipped with a dual-mass flywheel, it is the source of your problems. In fact, these parts have created a lot of problems on many vehicles. When they take part in the game they make noise when you start your Mercedes Classe M and when you turn off the engine. Have his condition checked out by a specialist.
