500th test car made at VW plant

When Volkswagen personnel were driving one of the 500 test cars made at the Chattanooga plant so far, they uncovered a computer software glitch that caused the sunroof not to close completely.

photo The VW logo is seen on the front of one of dozens of new Passats made at the Chattanooga Volkswagen assembly plant parked outside the plant. These cars will be used as demos for testing, internal quality control and press test drives.

The discovery prompted VW to change the car's software and ensure that future vehicles won't have that issue.

As VW edges to within a few weeks of assembling customer cars at the factory, the production of test vehicles has helped the company refine the all-new Passat and focus on quality, officials said.