The sunroof of BMW Brilliance 525 cannot be closed after being opened, and the sunroof needs to be reset. The reason why the sunroof cannot be closed is that the body control system has lost the value of the sunroof operation. The specific steps for the reset operation are as follows:

1. Open the driver's door of BMW Brilliance 525.

2. Depress the brake pedal of BMW Brilliance 525 to prepare to start the engine.

3. Press the one-button start button of BMW Brilliance 525 to start the engine.

4. The instruments of BMW Brilliance 525 light up and the power supply of the whole vehicle is turned on.

5. Push the BMW Brilliance 525 sunroof switch to the open direction with your hands until the sunroof is fully opened and continue pushing for 10 seconds to complete the reset operation.