My phone can drive my car. What can yours do?

An Apple Store customer plays with the new iPhone 3Gs June 19, 2009 in San Francisco, California. Hundreds of people lined up at the Apple Store in San Francisco to be the first to purchase Apple's new iPhone 3Gs which is faster than the previous iPhone 3G and has several new features. (Justin Sullivan, Getty Images)

Researchers in Germany have come up with an iPhone application that allows motorists to drive a car using their mobile phone.

The app has gas, brake and steering buttons that allow the user to control the vehicle. A roof-mounted camera allows the "driver" to see where the car is going.

It's able to navigate its instructions over Wi-Fi.

The iDriver app is not yet available commercially.