Remove attached parts following use

Remove unneeded auxiliary mirrors, roof or rear luggage racks after use.

Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption.

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    Requirements
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    System limits
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    Under the Hood
    The 528i has a 240-horsepower, 3.0-liter six-cylinder, while the 535i gets a 300-hp, turbocharged 3.0-liter six-cylinder. The 550i has a twin-turbo, 4.4-liter V-8 that makes 400 hp. All three use ...