Does the BMW 525 not have a keyless entry system?

[McCarmen]

BMW 525 is equipped with a keyless entry system. Keyless entry system process: The keyless entry system is a key with an intelligent electronic chip. If the BMW 5 Series is equipped with a keyless entry system, when the key approaches the BMW 5 Series body, the doors automatically unlock and the anti-theft alarm is deactivated; when the key moves away from the BMW 5 Series body, the doors automatically lock and the anti-theft alarm is activated. Key maintenance precautions: Do not expose the key to temperatures below 0°C (too cold) or above 50°C (too hot), as this will significantly reduce the battery life. Store the key in a dry environment, as a humid environment can also decrease battery life. Do not place the key with hard objects, as this can scratch the chrome plating on the key. Do not place the key near high-power appliances such as televisions, microwaves, washing machines, or computers, as these devices can reduce the battery life of the remote control.