Been working on my own cars since I was a teenager, and have kept up with the new technology, but would also call myself old school as well.

The spark plug replacement will be a lot easier having this tool to remove the plug wires:

Mercedes Benz V6 V8 Spark Plug Wire Remover Installer Wrench Tool 17mm | eBay

I did a quick youtube search and found a video to show how the tool is used.

https://www.youtube.com/watch?v=qzCdqlpRN3g