Cruising along on the autobahn at 220 kilometers per hour (136 miles per hour) is equal parts exciting and anxiety-inducing because my brain can’t shake the feeling I’m still breaking the law. That concern didn’t stop when I pulled over. I also experienced some apprehension about using BMW’s Display Key to control the $73,900 BMW M550i sedan.
Summary
The M550i is a happy medium between luxury and sport. It’s full of tech that’ll reduce commuter stress and even the almost gimmicky Display Key has its place in your pocket.
The Display Key with its tiny touchscreen basically replaces a lot of the features found in a car’s companion app. Drivers can lock and unlock doors, set the temperature in the car and check on their fuel level from a range of about 980 feet.
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https://www.engadget.com/2018/05/05/bmw-m550i-review-equal-parts-luxury-and-power/