Lexus has rolled out a three-row version of its RX, creating an alternative to customers who might otherwise buy an Acura MDX. The L has the comfortable ride, slick powertrain, and the good fit and finish of the standard-length RX, but it also gets the original’s clumsy handling and distracting controls. The standard RX L configuration seats seven; the optional second-row captain’s chairs limit seating to six. A single lever folds and slides the second-row seat forward, allowing a tiny path to the third row from either side. But that seat is tiny, and best for grade-school children; buyers will enjoy the extra cargo room more than the added seats. The L also comes as a hybrid, and all versions have the standard Lexus Safety System+, which includes forward-collision warning, automatic emergency braking, and lane-keeping assist. Blind-spot warning and rear cross-traffic braking are optional.