The two plugs nearest the bulkhead a real pain and you usually cut yourself on the heat-shields. The plug leads are really tight too so give them a bit of a twist before pulling them off, and don't tug the wires, pull the metal cap. I find the quickest way is to move the coil packs out the way to give you better access, there is no real need to remove the heat-shields and a universal joint on the ratchet helps.

Here are some pics:

Coil packs lifted clear.


These are a PITA, and the ones near the suspension towers.