Kann ich die Hydraulik nach all den Jahren wirklich retten?

In this video, I repair the complete hydraulic self-leveling system on my Mercedes C126 560SEC. The old hydraulic pump was deactivated and missing its drive shaft, so I replace it with a used one including a new seal and refill the system. I also fix several leaking lines, replace the shaft seal, the water pump, and the A/C compressor, and adjust the system back to the correct ride height.