Your Mercedes Benz S Class often stalls when the engine is cold, but only in that situation, and not at all when the engine is hot, and you have difficulties finding its origin? This problem, although less risky than an engine that stalls while driving, nonetheless deserves your attention because it could be the beginning of a more significant problem in the future for your Mercedes Benz S Class.
In this article, we will inform you about the various problems you might deal with when your car stumble in cold start so that you can react more efficently and not necessarily go to the garage, which often charges a high price for the service and does not always fix the problem.

Different motives to stall for a cold engine.

First, we will explore failures associated with mechanical problems. The second part will be focused to electronic problems.

stalls-when-coldmercedes-benz-s-class

1: Mechanical failures on your Mercedes Benz S Class

First thing to think about, the idle actuator. Remember, the latter’s role is to control the engine speed. It may be tricky for the latter to connect to the engine though the engine is still cold.
Another simpler consideration, but also common in these cases, is that the battery is likely low, and therefore does not have many reserves up to the point the engine has started. This means that after “heating” the engine, the battery has accumulated enough energy to keep your Mercedes Benz S Class on. Even so, it has difficulty maintaining autonomy once the engine is switched off. Which would explain why it only chockes cold.
Also remember to check your dashboard, and if, by any chance, an indicator light is not lit.
However, if your car always starts the first time, it is very certain that it does not come from your battery.
If the battery is not involved, look at some of the parts to be cleaned, such as filters, injection pump, or pressure regulator.
Keep in mind that a simple, heavily soiled part can disrupt the entire mechanism of your Mercedes Benz S Class. Verify all your parts to be able to leave out this type of failure.
Once mechanical breakdowns and fouling have been put aside, let’s search for electronic parts that could cause you problems.

2: Electronic failures of your Mercedes Benz S Class

The first essential parts are the onboard computer. the MCU (Motor Control Unit) acts as a platform for swapping and sending information throughout your vehicle. Electrical signals are received, processed and sent back as information to the different parts of your Mercedes Benz S Class.
For example, when you turn on your indicator, your MCU box receives the information, processes it, and then redirects it to your flashing room, which will then light up. We have taken here the example of the indicator, which would not prevent you from driving. If this information was associated to the engine of your Mercedes Benz S Class, then in this case it may stall cold.
Furthermore, let us talk about the calculator. This essential part of your vehicle is a central part of a system called an embedded system. This means that it electronically deals with the various functions of your vehicle, and therefore the ignition of the engine.
Find out more about this part if you have any doubts about it.

Directly linked to your computer, the TDC sensor.

Actually ,the internal combustion motor must have a precise ignition timing setting to be able for all the cylinders to fire in the correct order and at a specific moment. If the TDC sensor is damaged, it will not send this information to the onboard computer. As a result, as a safety measure, the ECU will stop the ignition system and your Mercedes Benz S Class won’t start.

At last, you may want to check your alternator.
It is very important for the engine to start because it turns the battery on, and the engine producesthe electricity needed to keep the battery charged when you drive.
This means that indirectly you could have a battery problem. If your alternator does not provide enough electricity to your battery, it will, consequently, be unable to keep your Mercedes Benz S Class on.

3: Conclusion on your Mercedes Benz S Class which stalls when cold

As we have come across in these various causes of cold stalling cars, this often leads back to the battery or directly matching parts. However, this could not be the only reason, do all the required tests to analyze the right functioning of each part. At last, the last thing to think about with Mercedes Benz S Class is to ask yourself this question: have you recently started refuelling at a new gas station? If so, it may be inadvertently degraded due to contact with water or impurities. This would affect your engine, which could start to stall quickly.
However, if this does not appear as soon as your engine is hot, then the impurity of the fuel is exonarated. The problem would be recurrent no matter if your engine is hot or cold.

Hoping to have been able to enlighten you about the various potential failures, do not give up in your research if you have not yet found.

If you need more tutorials on the Mercedes Benz S Class, go to our Mercedes Benz S Class category.