A drunken Manhattan man tried to keep driving after hitting a parked car in Brooklyn yesterday — but smashed into the back of a police cruiser instead, law-enforcement sources said.

Dasheen Kemp, 31, was almost four times over the legal alcohol limit when his BMW hit the squad car at Elton Street and Sutter Avenue in East New York, police sources said.

Kemp allegedly had a blood alcohol level of .306 when he crashed at around 4:20 p.m.

He allegedly tried to run after the bang-up but was detained by Officers Xhevat Cucaj and John Blanco, a PBA delegate.

Kemp was taken to the 75th Precinct station house and charged with vehicular assault and driving while intoxicated.