Your Mercedes A-Class 3 stalls at times, but only cold , and this is not the case when the engine is hot, and you have trouble finding the origin? This problem, although less threatening than an engine stalling while driving, still deserves your attention because it could be the beginnings of a more pressing problem in the future.
We are going, in this article, to try to show you the various problems which you could be confronted with on your Mercedes A-Class 3. The objective is that you can see more clearly and therefore not necessarily go to the mechanic who generally charges a lot the service and does not systematically resolve the breakdown.

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Different reasons to stall for a cold engine

First of all, we will discuss breakdowns linked to malfunctions ©-mechanical .MA . The second part will be devoted to problems electronic which can cause your Mercedes A-Class 3 to stall when the engine is still cold.

: Mechanical breakdowns that cause your Mercedes A-Class 3 to stall cold

First fault factor, idle actuator. As a reminder, the role of this is to regulate the engine speed of your Mercedes A-Class 3. It may have difficulty connecting to the engine while it is still cold.
Another more accessible but equally important factor in these cases, the battery is possibly weak, and therefore does not have much energy until the engine has started. This means that after "warming up" the engine, the battery has accumulated enough energy to keep your Mercedes A-Class 3 on. Regrettably, it struggles to maintain autonomy once the engine is off. Which would explain why it stalls only when cold.
Also remember to consult the dashboard of your Mercedes A-Class 3, and if by chance a light is not on.
However, if your car still starts on the first try, it is very likely that it is not the battery of your Mercedes A-Class 3.
If it does not come from the battery, go look at the side of certain parts to be cleaned, such as filters, injection pump, or the pressure regulator of your Mercedes A-Class 3.
It often happens that a single, heavily clogged part can modify the entire system of your Mercedes A-Class 3. Examine all of your parts to be able to rule out this type of breakdown.
Once you have checked all this, let's check the side of the electronic parts that can cause you problems on your Mercedes A-Class 3.

Electronic faults that cause your Mercedes A-Class 3 to stall cold

First elements are the boxes. Whether it be BSM or BSI, these serve as a platform for exchanging and sending information throughout your vehicle. Electrical signals are received, processed, then sent as information to the various parts of your Mercedes A-Class 3.
Imagine, when you turn on your turn signal, your BSM unit picks up the information, processes it, then sends it back to your flashing part which will therefore light up. Here we have taken the example of the turn signal, which would not interfere with your driving. If this information was connected to the engine of your Mercedes A-Class 3, then in this case it may stall cold.
Also, let's talk about the calculator. This capital part of your car is a central element of a set called an on-board system. In other words, it electronically manages the various functions of your vehicle, and therefore the ignition and maintenance of the engine.
Find out more about this part if you are not sure whether it works. Directly linked to your calculator, the TDC sensor. Its main function is to send the information to the computer, which will process it to then redistribute orders to the different parts of your Mercedes A-Class 3. Also, it may be your alternator that has problems. This is essential for the engine to start because it starts the battery, and it is this one that creates electricity to keep the battery charged while you are driving.
This means that indirectly you might have a battery problem. Consider that your alternator is not sending enough electricity to your battery, which in turn would be unable to keep your Mercedes A-Class 3 on, and therefore certainly cause your vehicle to stall.

Conclusion on a Mercedes A-Class 3 that stalls cold

As we have seen in these multiple causes of car that cold hold, this often brings us back to drums or directly related parts. Nevertheless, it happens that this is not the only reason, do all the essential tests in order to analyze the proper functioning of each part. Finally, the last thing to think about with regard to Mercedes A-Class 3, ask yourself the following question: have you been refueling recently at a new gas station? If so, it may be degraded unintentionally, due to contact with water or impurities. This would have consequences on your engine which could start to stall suddenly when cold.
Having said that, if as soon as your engine is hot this does not happen, then you will have to look elsewhere. The problem would be recurring no matter if your engine is hot or cold.

Hoping to have been able to enlighten you with regard to the many potential failures, do not give up in your research if you have not yet found the solution, it must necessarily be somewhere!