BMW's approach towards its car designs is iconic, to say the least. While not grand or flashy, the Bavarian luxury vehicle manufacturers' cars are instantly recognizable. The BMW 6 Series was introduced as a grand tourer that replaced the outgoing BMW E9, from which the legendary BMW 3.0 CSL was also hatched. The 6 Series was offered from 1979 to 1989, and after a hiatus of 14 years, the model was reintroduced back in 2003. To date, the BMW 6 Series has been offered in four generations, with each retaining its signature of luxury, comfort, and pure German performance. A chance to own a rare car is right here, in the form of this 1989 BMW 635CSi with just 106,500 miles on the bullet-proof engine.