Man fatally shot behind wheel of Mercedes on Upper West Side

A man was fatally shot behind the wheel of a Mercedes on the Upper West Side Sunday.

The victim got into a quarrel with his killer on W. 102 St. near Amsterdam Ave. about 12:15 p.m., cops said.

The shooter pulled out a gun and fired off one shot, striking the victim in the head, police said.

The gunman took off — leaving the mortally wounded victim to die inside the Mercedes-Benz GLA 250 he was sitting in. Police were working to determine the victim’s identity.

A woman sobbed at the scene as cops investigated the shooting.

The gunman has not been caught.