Sergio Marchionne's comeback carmaker will be hard pressed to repeat 2012's gains, and indeed Murphy figures its replacement rate will come below the industry average. In Chrysler's favor: As Fiat engineering takes hold, its product mix will increasingly be skewed toward small cars -- long a Chrysler weakness. A new compact sedan with an old name -- Dodge Dart -- will fill the hole left by the long-departed Neon. Chrysler has been releasing teaser pictures (pictured) in advance of the Dart's unveiling in Detroit in January.
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