If that is the case, the technician will have to identify the cause among the causes already mentioned and then see if this problem can be solved via programming or if it is necessary to replace any of the components. Since this system is delicate, it is advisable to leave this process in the hands of a specialist.įirst, the technician will scan the car with the adequate diagnosis equipment to check if the problem is actually related to the immobilizer system. How can I fix an immobilizer problem on a Mercedes Benz? Electronic failure: any of the contacts or internal electronic components of the module or the computer may get damaged.

Lack of synchronization of the immobilizer unit.Damaged antenna: due to electrical reasons, the antenna may stop working.⚠️ Faulty electrical wiring: it may happen both in the antenna as well as in the immobilizer unit or the engine's computer. ⚠️ The chip of the key is damaged or has been decoded: it may happen if the key is damaged or if it gets wet. The most common reasons as to why this happens are: ⚠️ Low battery of the key or the remote control: the chip will not send the signal. The main reason is because the car's computer does not recognize or does not detect the signal sent by the chip which is inside the key. Why is the immobilizer activated on a Mercedes Benz? Sometimes, this system will also block the steering column which will lock the steering wheel. Moreover, if the car has a diesel engine, this system will also block the “stop” relay, which will prevent the fuel from being injected into the engine.

The car's computer will disable the fuel pump, the ignition coil and/or the injectors, depending on the electronic immobilizer system.

The engine may turn on for a few seconds and then it will stop.

If the car does not recognize the signal of the key, two things may happen: What happens when the immobilizer is activated on a Mercedes Benz?

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