Coming accross constant noises on your car is likely to be annoying, a vehicle is so elaborate that it is most of the time complicated to determine its source and even more difficult to find the part that triggers it. In case you too have already experienced a cold engine noise on your Mercedes Classe C 3, we can clearly support you. Indeed, our editorial staff chose to publish this article content in order to inspect the main triggers of an engine that rattles when cold on your Mercedes Classe C 3. First we will take a look at engines that is rattling only at start up, then because of unsuitable oil and finally because of glow plugs.


The engine of my Mercedes Classe C 3 is rattling only when starting

If the engine of your Mercedes Classe C 3 generates a cold rattles, specifically when starting and which ends rather quickly afterwards, it is possible that your engine lubrication is at fault. Indeed, the oil strainer (the part that sucks up the oil and makes it rise to the top of the engine) can be harmed and therefore take time to make the oil rise when it is still very viscous. If this is your situation, after a few tens of seconds the engine that slams your Mercedes Classe C 3 should return to normal performance because the lubrication of the engine will be done normally, make sure to examine the condition of the engine.

Engine of my Mercedes Classe C 3 that rattles when cold because of too fluid oil

Another option which can justify an engine which cold rattling on your Mercedes Classe C 3 is that during an oil change the selection of oil was not best, in fact, engine oils differ on their viscosity, which we will compare with the “W” value, the higher this value is the thicker the oil will be and vice versa. If a too fluid oil has been chosen, it is possible that when cold, the lubrication it allows is not sufficient to limit engine slamming, compare the oil used and the oil recommended by the manufacturer, if your engine clicking is strong or if it persists on your Mercedes Classe C 3, do not hesitate to replace it with the right oil.

Engine that rattles when cold on my Mercedes Classe C 3 cause of the glow plugs

If you have a diesel engine, your engine is rattling when cold, and it has problems starting when it is cold, it may be your Mercedes Classe C 3 glow plugs that are at the end of their life. Indeed, a dead spark plug will cause the attached cylinder not to heat up and will create a stronger rattles on an engine Mercedes Classe C 3, so think about evaluating the state of your spark plugs separately using a multimeter, it may be that only one is involved like all of them. Here, we have listed to you, the main causes of an engine that cold slam on a car, do not hesitate to have a look at our page specialized to your car to find more info on all the breakdowns linked to your car.

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