Engine Exhaust System problems of the 2014 Volkswagen Jetta

I purchased a 2014 vw Jetta, brand new from vw boise in idaho. On 3 occasions, I reported an issue with the car shaking/losing acceleration power while driving (a serious safety issue). In October 2015, I had it in for service and explained the situation to them again, they assured me that a software update would fix it. On 12/02/2015, I was driving to pick up my daughter after work and a car in front of me was turning. I braked and the car started to shake and stutter. I let off of the brake and lightly pressed the gas to accelerate and the car started shaking violently. I immediately turned into the parking lot and my car blew a cloud of exhaust and died. I had to wait over 25 minutes before I was able to speak with a rep from vw roadside and then I had to wait an additional hour before the tow truck would be able to tow my car. I also was not given a loaner because they stated that they had none available. I had to call vw for an update as they had not called me and they said it might be because of bad gas (which I know is not the issue as it has been doing this for over a year). They said they would call me before close of business on 12/03 with another update. I did not get a call back and I filed a complaint with the vw consumer's department but they were not helpful and said they'll have to refer it to a regional manager. I am still stuck without my car, without any explanation, and without a loaner vehicle.

Diesel exhaust smell enters cabin through interior climate control vents. Smell is originating from rear of engine, smell is pure un treated diesel exhaust. Dealer has replaced several components but to no avail. Unable to find any sign of leak with smoke or pressure testing. Smell enters cabin when vehicle is stationary, worse when cold or when engine is in the midst of a diesel particulate filter regeneration. Vwoa says normal and operates like other vehicles. Refusing to send lead tech out to investigate. I currently own two of the same model of engine as in this car and other car has never smelled like diesel exhaust in 30,000+ miles. There is a small leak in the exhaust system that is obviously hard to identify. Vwoa says it is ok for me to breathe diesel fumes.