In 2007, as another part of The Way Forward, Lincoln began a rebranding of its model line. As Ford considered the Lincoln Mark series to have high nameplate recognition, Lincoln began to introduce similar "MK" branding across the model lineup. For 2007, the Lincoln Zephyr was rebranded as the Lincoln MKZ ("em-kay-zee"), with the 2007 Lincoln MKX ("em-kay-ex") crossover SUV introduced. Originally slated to become the second-generation Lincoln Aviator, the MKX was the Lincoln counterpart of the Ford Edge. Alongside the Lincoln Town Car, the Lincoln Navigator was not included with the MK rebranding; for 2007, it was redesigned alongside the Ford Expedition, marking the debut of the extended-length Navigator L. For the last time, a Designer Series Lincoln was produced, as Lincoln discontinued the trim on the Town Car after 2007. Produced only as a concept car, the 2007 Lincoln MKR marked the debut of the Ford EcoBoost V6.