How do I refill Audi A5's AdBlue tank?

I recently bought an Audi A5 and I noticed that its AdBlue tank is almost empty. How do I refill it and what are some important things to keep in mind?

To refill the AdBlue tank, first make sure the engine is off and the car is parked on a level surface. Open the fuel filler flap and locate the AdBlue filler neck. Using a funnel or AdBlue nozzle, slowly pour the AdBlue fluid into the tank. Be careful not to spill any on the exterior of the car as it can cause damage to the paint.

When purchasing AdBlue fluid, make sure to get the right type for your Audi as different models may have different requirements. It's also important to check the tank level regularly and to refill it before it completely runs out to avoid any potential engine issues.