The coil "boots" are a part of the ignition wire set. When you lift the coils up they will just plug in after removing the old ones. When reassembling, be sure to wire brush the threaded contact for the coil which fits into one of the corners of the coil. Hit it with contact cleaner also. The rest is straight forward. I had to replace the plastic vacuum line which runs alongside the wires as mine was brittle from the heat over a period of time. (1997 C280 - 76,000 miles). The dealer will have the replacement line. Spread a little dielectric grease around the lip of the plug boots to make for easier removal next time.

Tim