The value of product increments being delivered is estimable, and once estimated (whether as ROI, cost of delay, or some other measure), its value can be prioritized. In Scrum, this is known as working from a prioritized product backlog. Agile can be used to create high quality products.
No wonder then that the C-Class, one of the most affordable Mercedes models, is the best-selling luxury car in America. A range of turbocharged 4-cylinder, 6-cylinder, and 8-cylinder engines are available; the latter are reserved for the AMG performance-tuned versions of the car.
The sixth most popular luxury car in America is the Lexus IS. For 2014, Lexus redesigned the IS 250 and IS 350 sedans, but the IS 250C and IS 350C convertibles are the same as in 2013. The high-performance IS F sedan is also carried over.