Where is the fuel tank cap switch for the BMW 4 Series?

[LaDaisy]

The BMW 4 Series fuel tank cap switch is a sensor switch, not a physical one, and the sensor switch is located on the fuel tank cap. When the central locking system is unlocked, simply walk up to the fuel tank cap and press it lightly to open it. The BMW fuel tank cap consists of two parts: an outer and an inner cap. The inner cap can be opened by twisting it manually. Here is some relevant information about the fuel tank: 1. The fuel tank is in a semi-closed state only during refueling; otherwise, it remains fully sealed. However, as the vehicle ages and is used over time, sediment and impurities inside the tank will accumulate, inevitably entering the engine through the fuel supply system. Over time, this can cause damage to the vehicle. 2. The fuel tank itself has protective measures in place to waterproof and insulate. If the vehicle frequently idles for long periods, it may require a fuel system cleaning or filter replacement by around 30,000 kilometers. Otherwise, if the fuel line becomes clogged and the tank's internal pressure rises too high, the car may experience shaking while driving. Under high pressure, the fuel tank is highly susceptible to cracking, which can lead to fuel leakage in severe cases and increased fuel consumption.