The automaker will include a 2.0-liter TDI option on the redesigned A4 when it arrives in 2014. Keogh told reporters that, "This deep in its life cycle, it didn't make any sense to do all that dramatic re-engineering and re-architecting of the car to basically only have a two-year selling period."
Audi, which now offers TDI versions of its A3 hatchback and Q7 SUV, said in November that it would add diesel versions of the A6, A7, A8 and Q5 models in the US. The A8 will start sales this spring, while the A6, A7 and Q5 diesels will debut at US dealerships this fall.
Last year, Audi sold 7,179 diesels in the US, down 1.6 percent from 2011.