Are we talking the inside or outside handle?
I'm assuming outside. You could just remove the handle from the door, then clean and lubricate the works. Also gives you a chance to ensure there are no broken bits in the works that might be causing it to stick.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.