Related to my other post about my father-in-law's 2007 Q7 4.2, while we were pulling the plugs, there was oil on the coil packs and plug threads which is usually caused by valve stem seals.

Again, I don't know anything about Audi so my question is if there are any special tools needed to remove the valve covers? All I see are several Torx screws. Do I need anything else that wouldn't already be in a normal toolbox? Any special considerations or precautions that need to be taken?