Why can't the fuel tank cap of the Passat be locked?

[Vargas]

The reasons for the fuel tank cap not closing properly are varied, including rust on the fuel tank cap, damage to the fuel tank cap cable, loss of elasticity in the fuel tank cap spring, aging of the fuel tank cap's engagement point, or damage to the fuel tank cap motor. The specific cause should be diagnosed by professionals at a repair shop or 4S store. Solutions for a car fuel tank cap that won't lock: If the fuel tank cap of a Volkswagen New Passat cannot be locked, you can try fine-tuning the fuel cap to align it with the lock hole. If this doesn't work, it's necessary to take the car to a repair shop for maintenance. Points to note when refueling a car: It's better to refuel in the morning or evening to avoid the strong midday sun. Do not exceed the upper limit of the fuel tank when refueling.