Question: What discontinued Mercury model was a rebadged variant of Ford's competitor to the Nissan Altima?

Context paragraphs:
Pontiac Astre: The Pontiac Astre is a subcompact automobile that was marketed by Pontiac as a rebadged variant of the Chevrolet Vega.  Initially marketed in Canada for model years 1973-1974, the Astre debuted in the U.S. for the 1975 model year, competing with other domestic and foreign subcompacts that included the Mercury Bobcat, Volkswagen Rabbit, and Toyota Corolla.

Mercury Villager: The Mercury Villager is a minivan manufactured by Nissan and marketed by Ford's Mercury subdivision for the model years 1993–2002, across a single generation.  Internally designated as model "VX54", the Villager was a rebadged variant of the Nissan Quest—a product of a joint venture between Ford and Nissan, manufactured at Ford's Ohio Assembly plant in Avon Lake, Ohio.

Lincoln Aviator: The Lincoln Aviator is a mid-size luxury sport-utility vehicle (SUV) that was sold by the Lincoln division of Ford Motor Company from model years 2003 to 2005 in North America.  A rebadged variant of the Mercury Mountaineer and Ford Explorer four-door SUVs, the Aviator was the shortest Lincoln vehicle ever sold (at its debut).

Nissan Altima: The Nissan Altima (Japanese: 日産・アルティマ ) is a mid-size car which has been manufactured by Nissan since 1992.  It is a continuation of the Nissan Bluebird line, which began in 1957.  The Nissan Altima mainly competes against cars such as Chevrolet's Malibu, Ford's Fusion, Honda's Accord, Hyundai's Sonata, Mazda's Mazda6, Subaru's Legacy, Kia's Optima, Toyota's Camry and Volkswagen's Passat.

Nissan Quest: The Nissan Quest is a minivan that was manufactured from 1992 until 2016 by Nissan.  The first two generations of the Quest were a joint venture with Ford, which marketed a rebadged variant as the Mercury Villager.  The vans debuted at the 1992 North American International Auto Show in Detroit.

Infiniti J30: The Infiniti J30, or Nissan Leopard J Ferie ("férié" is French for "holiday") in Japan, was a rear wheel drive luxury car.  The J30 went into production on April 7, 1992 as a 1993 model to replace the M30 (which was a coupe), and was launched in the United States after its competitor, the Lexus GS.  The car was designed to slot between the smaller G20 and the larger Q45, as Infiniti's first mid-size sedan to compete directly with the Acura Legend.  Also, it was fairly small but featured rounded styling uncharacteristic of the crowded executive car class, that is now reminiscent of a four-door coupé.  Chief designer for the J30 was Jerry Hirshberg, president of Nissan Design International (NDI) and exterior designer Doug Wilson in 1988-1989.  Design work was frozen in 1989.  In a promotional video produced in 1994, it was referred to as a "personal luxury sedan" as attempt to define it as a four-door coupé.  It has the round looks of the Nissan Altima/Bluebird U13.

Ford Fusion (Americas): The Ford Fusion is a four-door, five passenger mid-size sedan manufactured and marketed by Ford across three generations in gasoline and gas/electric hybrid variants.  Introduced for model year 2006, the Fusion is manufactured at Ford's Hermosillo Stamping & Assembly plant along with its rebadged variant the Lincoln MKZ — and formerly with its now discontinued rebadged variant, the Mercury Milan, all sharing the CD3 platform.  The Ford Fusion mainly competes against cars such as the Buick Regal, Chevrolet Malibu, Honda Accord, Hyundai Sonata, Kia Optima, Mitsubishi Lancer, Nissan Altima, Toyota Camry and Volkswagen Passat.

Lincoln Versailles: The Lincoln Versailles is a compact luxury car that was marketed by the Lincoln division of Ford Motor Company.  A rebadged variant of the Mercury Monarch and Ford Granada, the Lincoln Versailles was sold from the 1977 to the 1980 model years.

Infiniti QX70: The Infiniti QX70 (formerly called the Infiniti FX until 2013) is a mid-size luxury crossover SUV produced by the Nissan-owned Infiniti luxury vehicle brand between the 2003-2017 model year.  The FX replaced the QX4 as Infiniti's mid-size SUV, although the QX4 was larger than the FX.  It shares the same FM platform as the rear-wheel drive Nissan 370Z, and it "made no claims of climbing mountains."  Rather, its aggressive shape promised style and quick handling.  The similarly sized Nissan Murano is based on the same D platform as the front-wheel drive Nissan Altima.  The FX and QX56, that do not have Nissan-branded equivalents, are not sold in Japan.

Nissan Teana: The Nissan Teana is a mid-size car produced by Nissan of Japan.  It is exported as the Nissan Maxima and Nissan Cefiro and Nissan Sentra to certain markets.  It replaces the Nissan Bluebird and Cefiro.  It shares a platform with the Nissan Maxima and Nissan Altima which are sold in North America, as well as the Japanese market Presage minivan.  The Teana has been available in East Asia, Russia, Ukraine, South Asia, ASEAN, Australia, New Zealand, Latin America and the Caribbean.

Supporting paragraphs: Nissan Altima Ford Fusion (Americas)
Answer: Mercury Milan