What are the hidden functions of the Audi Q3 car key?

[StSawyer]

The hidden function of the Audi Q3 car key is that pressing and holding the lock button can raise all four windows. Below is the method for replacing the battery in the Audi Q3 car key: 1. Press the lock button and pull out the mechanical key. 2. Locate the clip, which is inside the mechanical key slot. 3. Use the mechanical key to pry the clip from the inside out. 4. Remove the loosened battery cover. 5. Ensure the battery is placed with the positive pole facing up, i.e., the '+' side up. 6. After replacement, reassemble in reverse order according to the steps. Below is additional information on reasons why a car key might not come out: 1. The gear is not fully returned to the P position. 2. There are obstructions like coins in the gear slot preventing it from returning. 3. The steering wheel's self-locking function is activated, causing the steering lock pin to engage with the steering column. 4. The lock cylinder is damaged.