Nissan is preparing for a new addition to the very popular Murano crossover lineup, and surprisingly the future will be a convertible. The Murano has been on the market since 2003 and for 2009 it underwent a complete makeover, and now Nissan is engineering a drop top version of the redesigned model. Expected to make its debut by the spring of 2010, the Murano drop top will be the only four-door convertible except for the Jeep Wrangler Unlimited, which is geared toward a completely different audience. Although retractable hard tops are gaining popularity, the Murano will stick with a traditional soft top to keep fuel economy similar to the Murano’s current 21MPG combined city/highway rating.