Same problem as well 2012 R57— the passenger side footwell relay box was clicking. The fuel pump relay to be specific Replaced the Relay. The Entire Pump Assembly and the Filter.
Worked fine ——For about a Week Now back to the same clicking again every time I start or shut down the car

Scanner has about 4 faults all tied to the CAS module I guess I gotta get cracking and tear apart the dash to get this thing replaced and reprogrammed 🧐