Testing fuel system and control pressure and WUR

Mercedes 1983 R107 380SL Testing the fuel system pressure and control pressure. I found a problem with the warm-up regulator being clogged. I am an enthusiast doing this in my free time and sharing for your entertainment. Do not take these videos as technical advise. 00:15 building a fuel pressure tester 01:46 connecting fuel pressure tester 01:59 building fuel pump switch 05:15 connecting fuel pump switch 05:25 testing fuel pump 05:29 testing control and system pressure 06:19 checking WUR return flow 06:43 WUR analysis 08:53 checking WUR vacuum control 09:04 testing WUR heating element Music: Music by Freccero from Pixabay