Hello I'm new

I just wondered if someone could tell me how to turn this off? I have an R reg Audi A4 and my dog keeps setting it off when I've popped in to the shop on the way home from our walks

Thank you in advance

J

 

should b a button on the drivers side pillar between front and back door

 

or in the door pocket on the drivers door along with the trunk button.

 

there is a trunk button? lol