The screw is on the drivers side of the trunk hinge. Remove the black plastic piece and unscrew it as much as to can then put the plastic back on. This will still not be high enough so I took a 1/4" nut and taped it on with electrical tape to give me the extra height. This is my second a8 I did it on and it works perfectly.

 

can you point it out in a picture please? I have the same problem and I looked for it but there are other screws and I don;t want to make it worse by unscrewing the wrong one.

 

I am not quite sure what the grommet screw is ether? A picture is worth a hundred words as the saying goes. If it would not be too much trouble Val.
Also if you please, what exactly does raising this grommet screw do to help it lift the trunk lid?
I have ordered a new set of struts for the trunk wondering if that may help. I'll let you know when I install them. It has been a long wait for them to come from the EU to the states.

 

https://www.audiforums.com/forum/att...1&d=1446695740

If the attachment doesn't work send me your e mail and I will send you the picture.

 

https://www.audiforums.com/forum/att...1&d=1446696581

 

Thank You Val ! I'll give it a try...
I kind of thought that was what you talking about but couldn't see the correlation between that adjustment and the trunk not opening. I'll go after it today. Thanks.

 

You can get 1/4" of height by removing the rubber ring and unscrewing the adjustment nut then you will have to add another 1/4" to get the additions height. I just taped on a nut. I was going to make up something permanent but it has been working flawlessly on both my a8 and a8L.