Diagnosing a BMW 550i Cam Shaft DTC. The ATS eSCOPE ELITE and the eSCAN ELITE are used. There is a great scope tip in this video to help find loose timing chains.
https://www.automotivetestsolutions.com/oscilloscope-menu
https://www.automotivetestsolutions.com/online-store/eSCAN-ELITE-p78816489