I have a customer with a 745 who has me use S100 (P21S) on it about every 3 weeks because he likes the shine and slickness so much. Good for me money wise, and good for his car appearance wise.
Upselling a wash to a wash/wax is easier with S100/P21S.
BTW, your 740 looks great! Nice wheels, too. Much easier to clean that the factory 16" wheels with all those little diamond shaped crevices.