Product: DayZ Experimental v 1.08.153164 - no mods
Description: If you stop your car chased by zombies, they would surround your car but mostly attempt to get to driver's door. If you leave your car and kill these zombies, leaving their bodies at car's driver door, you cannot enter the car - cursor option to enter the vehicle never appears. Workaround by having zombies respawn - by restart or run far enough and return to your car (zombies respawn and your door to driver's seat is now unobstructed)
Observed with: Lada Niva and Volga