Welcome mjd23
The variocam is a neat mechanism, not a difficult job to replace pads and chain, but im glad i spent for the cam saddles special tool for convenient and simple R&R of the cams and chain.
How many miles on your car, and have u inspected the cam pads for wear?
Thats a good job to do by 90k miles, if not sooner.
Forum advanced search will provide u with plenty to read.
And ask away. Abundance of knowledgeable and friendly folks here
Oh and BTW, be sure to look closely at cam sprockets for cracked or missing teeth. I had a broken tooth with another about to go; sent both cams for repair with new sprockets. Not cheap but half the price of 2 new cams.