@lucaslfc Based on my experience recently... You may find it significantly easier to remove the coil packs if the engine has a very small amount of warmth to it ( circa 5-10 mins / 50’ on the internal temp gauge ). Otherwise trying to remove the coil packs if they have never been changed or removed previously on a stone cold engine will be like trying to pull teeth. The rubber feet can also stick to the original spark plugs or pull away from top of the coil pack if you are not careful.
See Deutsche Auto parts vid on Youtube as an example!
Warming the engine a little reduces the suction and should eleviate the potential sticking problem. Once the packs have been removed leave the car to fully cool down before replacing the Spark plugs to avoid cross threading issues .
Enjoy the new RS7 NGK plugs, they make for a smooth and responsive drive.
All the best
Jungle