2009 Volkswagen CC trunk won’t open with key and won’t open by release button only by emergency latch

Question edited for clarity.
Question moved to Audi A8.

Get in through the back seats and pull the emergency latch.

'98 A8 Quattro-Dead Battery-Cannot open trunk to get to ...

https://www.audiforums.com > ... > Audi A8
Jan 12, 2009 - There should be a lever at the top of the rear seats that lets you pull them forward, once thats done you can climb into the trunk and release ...
Trunk won't open! - AudiForums.com
Dec 26, 2018
Trunk Won't Latch - AudiForums.com
Oct 16, 2008
Key fob RE-SYNCHRONIZING. Key won't work??
Apr 19, 2017
Resetting convertible top and trunk - AudiForums.com
Apr 20, 2017
More results from www.audiforums.com

Audi a8 trunk release fix (part 1) - YouTube

https://www.youtube.com > watch

3:41 In this video you will see step by step instruction on how to fix the issues with the trunk not opening upon ...
YouTube · Bethel Ben Israel · Mar 20, 2015

My Audi a8 1999 - JustAnswer

http://www.justanswer.com > Car Questions > Audi Repair
Mar 23, 2013 - My Audi a8 1999. Battery dead.so auto trunk latch inoperable. Key won't go in. Jammed? Twisted? Any other way to open - Answered by a ...

https://www.youtube.com/watch?v=78mey0uYBJw This vider will show you the emergency release port.

check the fuse panel.... owners manual should list which fuse number is the trunk release. If fuse is blown, a new fuse may allow release of trunk. If latch release is bad or shorted out... the fuse may blow immediately.

emergency release is connected directly to latch release ---the linkage rod may be disconnected ,latch may need lube --spring damaged or disconnected latch simple enough to replace junk yard cheapest --online,auto stores -or dealer most expensive

I'm not sure what you're definition of trunk latch is so let's cover all the bases.

The trunk latch mechanism is inside the trunk well. When you open the truck lid, look down, right in the middle of the back lip that you would have to lift things over to put them in the trunk. The latch mechanism is right there in the middle. While you are looking in the location, look just to the left as you are standing behind the vehicle, and you will see a handle kind of like the pull handle on the end of the cord for your walk behind mower. That is a glow in the dark, emergency pull release for the trunk latch. If you or a child ever got caught in the trunk for some reason, you can pull that handle to manually operate the trunk latch to allow you to open the trunk lid.

On your key FOB, you have a trunk release button as well. If you push that button twice within 5 seconds, the trunk latch will release. You also have a trunk release button to the left of the steering wheel. It's a round button with a picture of a car with an open trunk lid. You can push that to open the trunk lid as well. To use the button inside the car, or the one on the key FOB, the car must have the transmission in park. It will not release the trunk latch if the vehicle is in gear.

Lower the back seat and crawl into the trunk and see what the latch is doing when you activate the key fob. the trunk lid will have to be open to enable any repairs. Also an emergency release cable is probably visible (yellow handle) inside the trunk and will Open the trunk lid.

check trunk fuse

· There is no motor per say, (a servo that pulls the cable, youd should hear it, every time other then unlocking with key, or pulling inside emergency latch) the cable that connects to the trunk latch mechanism. There is a servo that opens the trunk when you unlock with key fob, or driver side activation. In the trunk pulling on emergency handle, it is pure cable action. One of the most reported problems is that a trunk will not close. In this instance the usual cause is a broke spring in trunk latch. In your case I am guessing that the cable has become detached from locking mechanism. I have not had this problem, however if I did, my first attempt would involve removing the trunk lid linker, there are about 8 or so screws (with felt on them so they are not so noticeable), remove all screws, liner should almost fall off when all screws are removed. I then could inspect latch, manually unlock, then stand outside of care to fix problem: reattach cable, replace latch, replace cable, there may be some other alternatives depending on specific situation.

It sounds like your latch has double locked. Here is the fun part, can you drop your rear seat and get into the trunk? If you can look for a tag that is possabily glowing pull it to release the emergency latch on the trunk. then with your finger lock the latch and check to see if it is leaving a large enough gap fot your pinky finger to fit in. if it is then you have reset it. if not then pull the emergency release a few more times

Sounds like the cable for the emergency release handle on the trunk cover is binding. Seen a few where the cable isn't passed in the right spot and the moment is shifts the trunk opens because the cable has too much tension. Also seen broken emergency grab handle just a little broken that will do the same because the cable is not in the right position. Usually a defective latch you will have problems closing it too.