A property manager on his way to collect rent for a real-estate firm was gunned down in an apparent robbery in Brooklyn, authorities said yesterday.

The body of Paul Setteducato, 64, was found lying next to the driver-side door of his 2000 Mercedes-Benz SUV after he had been shot several times in the head and chest on Erasmus Street near Nostrand Avenue in East Flatbush at about 6:20 p.m. Monday, cops said.

No arrests had been made as of last night.