Hoosier daddy. I have posted numerous issues on this car. How long a test drive you need at approximate 500 miles it starts this issues I take it back because I sir have had many a new car and o by the way own a 57 Chevy 283 engine and it far smoother than this 40k car.i have gone thru the proper channels right thru to the district man for cadillac.you may like to drive your car with trembles and shakes that's your decision.i had a pt cruiser for 11 years and never experience anything like this.sonas a cadillac owner and a way step up to this car I expect better and not expect anything less.i have had a personal chat with service mgr and he assures me that the turbo now is smooth and he got one for his wife.so I think cadillac can either fix there 2.5l. Or step up and get me into a turbo. The quality I deserve since I pay the bill.i am sick and tired of customers excepting inferior cars from our American company's we deserve better and GM needs to assure us no matter if we test drive a car or not. They should have quality tested this engine not just throw it out there and we the consumer suffer.