How can the alarm in my Audi TT be turned off without using the buttons on the key?

To turn off the alarm in your Audi TT without using the key fob buttons, you can try unlocking the driver's door with the physical key. Alternatively, you can also start the engine with the key in the ignition, as this typically deactivates the alarm. If those methods don't work, disconnecting the car battery for a short period can reset the alarm system.