Mercedes boss Dieter Zetsche tells the BBC's Samira Hussain the car of the future is "a smartphone on wheels"
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Mercedes boss: The car is becoming a smartphone on wheels

At the Detroit Motor Show it's about the cars - but it's also increasingly about the technology inside the cars.

Samira Hussain speaks to Dieter Zetsche, head of Mercedes-Benz, about autonomous vehicles, and cars becoming smartphones on wheels.