What could possibly be more distressing than noises when you start your automobile… Indeed, you probably previously discovered noises when you start your Mercedes Classe S and generally speaking it’s frustrating. It might not be anything major, 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 team has chosen to prepare this document to help you find its source. To do this, first, we will see the case of noise when starting on Mercedes Classe S but the automobile does not start, and finally, the noise you can experience on your automobile if it starts, first cold and then hot.
I experience a noise when I try to start my Mercedes Classe S, but the engine doesn’t start
I pay attention to a clicking noise at the start of my Mercedes Classe S
If you experience a noise when you want to start your automobile, and it does not want to turn on, it is most likely that it is the battery that is causing the trouble. Indeed, if you notice clicking noise when you start your Mercedes Classe S, and it sounds like a ticking, you most likely lack the energy to run your starter, check your battery with a voltmeter and change it if required. In the case that after checking out your battery, you still encounter a noise when starting your Mercedes Classe S and it does not want to start, consult this content about starter motor noises on Mercedes Classe S for more info and to discover the source of your trouble.
I acknowledge a noise when I start my Mercedes Classe S but the engine it starts
I experience a noise when I start my Mercedes Classe S
- Grinding or squealing type noises when I start cold Mercedes Classe S :
If you experience a noise when you start your Mercedes Classe S, and this noise looks like grinding or squealing noise, which can also be linked to vibrations, it is plausible that it is the combustion of your automobile that is involved. Indeed if you have an air/fuel mixture that is not good the normal operation of the engine will be altered. Verify the state of your injectors and air intake system. For more info on the source of injection-related noises on Mercedes Classe S, read this article content. - Cold start friction parts Mercedes Classe S :
If you notice cold friction noises on Mercedes Classe S, it is practically 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 make a friction noise, often when cold. Visually verify your belt and change it if needed. If you have other friction noises, and it doesn’t result from your serpentine belt, we have a full content on engine of your Mercedes Classe S.
I experience a noise when starting my Mercedes Classe S even when hot
- rubber mount / silent bloc dead motor
If you experience a clacking noise just as 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 expired. And the huge vibrations made by starting the engine can make starting noise on Mercedes Classe S. Verify their state and change them if needed. Read this content if you would like to have detailed info on rubber mount noises on Mercedes Classe S. - Motor flywheel
Finally, if you discern a noise that sounds a little like a crank noise when you start your Mercedes Classe S, 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 generate noise when you start your Mercedes Classe S and when you turn off the engine. Have his state checked out by a professional.
