Answer:
<em>Competitive Advantage
</em>
Explanation:
Competitive advantages <em>are factors that allow a business or nation to manufacture an equal value product or service at a reduced price or in a more favorable manner.</em>
BMW offers maintenance and service programs at a cheaper, at this case free, rate.
Such factors allow the competitive company to produce more revenue or higher margins than its competitors on the market.
Competitive advantages are traced to a number of different factors such <em>as pricing structure, marketing, product range performance, distribution system, intellectual property, and customer support.</em>