Getting the wires off is quite a chore. Have patience, be careful and DO NOT resort to pliers or to pulling the wires themselves, you will pay for it with a new set of very expensive spark plug connectors. I usually remove the electrical boxes (that's as close as I get to the technical name) from the valve cover to get a bit more clearance. They are the square plastic junction boxes, if I recall they take a torx or hex to remove them. Good luck. Did I mention to have patience?

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64 230sl, my daily driver
94 E500, sold
98 E320, family and dog hauler
04 C240, safe machine for teen drivers, but a poc
08 audi a4, yes we have gone to the dark side