Back in 2009 when the 550i was introduced, BMW executives freely predicted that it would be so popular that they stop shipping the traditional 5-series sport wagon to the U.S. Meanwhile the 550i has stalled out. Blame it on its excessive weight (two-and-a-half tons), high price ($65,000) or ungainly proportions, the 550i remains a rare misstep for the Bavarian marketing machine.
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