Just when you thought Mercedes couldn’t pack any more features into its vehicles, its owner, Daimler, partnered with Garmin.The wearable manufacturer recently revealed plans to provide health data through the Mercedes Me app, which enables vehicles to monitor drivers' health characteristics, such as heart rate and stress levels, then address them.

So how does this look in execution? If drivers show high stress levels, fthe vehicle can show them less stressful routes through the navigation screen. In the future, these features may potentially include playing soothing music from the infotainment system or changing the car's fragrance or ambient lighting.

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