Nissan was scheduled to debut its new Infiniti QX Inspiration concept car at the Detroit auto show on Monday, but executives delayed the launch and closed the curtains on the car without any explanation.

Executives said they couldn't get the car started and eventually had to push it on stage.

The Infiniti QX was among one of the hottest debuts anticipated at the North American International Auto Show. The more than 100 international journalists who lined up for the 11:40 a.m. launch in Detroit could see technicians working on the car just before it was scheduled to drive onto the stage.

After about 30 minutes of waiting, executives drew the curtains on the all-electric SUV and told the audience they hoped to reschedule the event for later in the day.