1978 Mercedes-Benz 300SD
Mercedes-Benz has long been one of the companies that first innovated with turbocharged engines. The 300SD was one of the first turbocharged cars on the road and the company has long turbocharged diesel engines. The 300SD turbo was one of the most notable cars on the road when it first hit the market. Mercedes-Benz put a lot of engineering into the engine and the way that the car drove, which made it quite popular (via Popular Mechanics).
The 300SD was one of the innovators when it came to turbocharging a diesel engine, which is why the car is still popular today. Even though there have been a lot of competitors, the 300SD was the original when it came to design. From a driving standpoint, this was the cream of the crop and drove quite well. You won’t find another large sedan from this era that moves like the 300SD.