THe comfort seats are worht the money 2x over.
Myself and my wife , expecially my wife, love the comfort seats.
my wife has been in a loaner for the last several weeks, and when I brought the 550 (with comfort seats), home the other day she was talking about how much she misses her seats.
believe it or not the comfort seats are one reason I am moving fomr the 335 to the 5 series.

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M3