I have a 2013 A4 and today I'm doing some DIY job with it and I disconnect the battery. When I close the trunk it locks automatically. The car has no key hole on the trunk, no rear seat fold. I wonder if anyone knows how can I access to my trunk now? Does jump start works(there's a portal at front but one side of the battery is already disconnected)?

 

Sounds like your 'Valet' button has automatically activated..... open the glove box and press the valet button....

 

If you look around on the bottom of your rear seat there should be a wire loop which should open the trunk. If you can't find it then you need to remove the rear bottom seat and look for the wire loop. Pull it and the trunk should open.

 

Thanks. Read through the manual and it shows the same thing you mentioned! There's a wire loop and it takes a lot of strength to pull it open.