The BMW 7 Series is a line of full-size luxury vehicle introduced in 1977. It is BMW's flagship car and is only available as a sedan or extended-length limousine.
The E23 7 series cars were very upscale and sophisticated for their time. They were the first BMWs fitted with service interval indicators, a 'check control' that alerted the driver to various system faults, and complex climate control systems. On-board computers and anti-lock braking system (ABS) were optional on early models but later became standard features. Also, later models (1985–1986) offered an optional driver's air bag. A variety of options included leather upholstery, several types of wood trim, power seats, seat heaters, and power windows and mirrors. Four-speed and five-speed manual gearboxes were available and an automatic transmission was also available.
Source: Wikipedia, 2012