I am a fan of Citroens especially the C5 with hydraulic suspension.
For almost 20 years, I have been amateurishly maintaining everything related to technical interventions. I’m not a mechanic but an electronics engineer, but it’s not hard for me to roll up his sleeves and look under the hood.
What I do I usually photograph and/or record and on occasion, I prepare a video so that no one else needs to research too much how to do something.
I log data and record my drivings. You can see example of how it looks when C5 doing FAP regeneration. See link bellow.
If you follow my work you do that at your own risk, but if you like it and want more of this kind of content, you can buy me a coffee.