offered with many previously extra cost options now included as standard in addition to the Estate Wagon. To further differentiate the Limited model, fenders included four VentiPorts (up from three) and the interior had velour upholstery with loose pillow designed seating or vinyl with leather available in later years. Production records show 21,312 were built for 1979. An appearance change was introduced for the simulated woodgrain changing from mahogany to oak which was used for several decades. Cargo capacity with the second row seats in place was 87.9 cubic feet and the core chassis elements remained in use until 1996 when the GM station wagon production was terminated. When the Estate Wagon was introduced it had a shorter wheelbase than the 1964 Buick Sport Wagon. The tradition of luxury continued with power windows, power adjustable drivers split bench seat, six speaker stereo system, dual power adjustable side view mirrors, Touch Climate Control air conditioning, GM's Twilight Sentinel automatic headlight activation and other luxury features found on the Buick Electra. The 1977 listed retail price was $6,078 ($ in dollars ) with the optional rear facing third row seat, while the "Dual-Action" tailgate was now standard equipment with a power retractable rear window on all GM station wagons. In 1980, body changes made the wagon more aerodynamic for better fuel efficiency. Also that year, the Electra Estate Wagon was introduced and replaced the Estate Wagon Limited while the 'base' model was now called LeSabre Estate Wagon. Exterior woodgrain applique was standard on the Electra Estate (but could be deleted for credit) and optional on the LeSabre Estate. The Buick 350 V8 engine was dropped from the options list and a 5.7 litre diesel 350 V8 was now available through 1985. The standard engine was the 5.0 litre Oldsmobile 307 V8. Although the Electra and LeSabre coupes and sedans had both switched to new front wheel drive platforms by 1986, the model names also continued to be used on the rear wheel drive wagons through 1989 making the Estate the largest rear wheel drive Buick offered. For 1990, which would be the Estate's final year, the Electra and LeSabre model designations were dropped and the car was once again sold simply as the Estate Wagon. As with the Electra Estate in previous years, standard exterior woodgrain could be deleted for credit. Although the Estate Wagon model was discontinued in 1990, the Estate