12V Line

How To Create a 12V Line When The Ignition Is On on 2006 Audi A8 D3

12V Relay

So, I got tired of switching on and off my bluetooth and raspberry pie in the trunk, sometimes I forgot and both of them running all day, I created a 12V line today, only on when ignition is ON and off when the ignition is off. Just need a 12V relay – a fuse line