I bought a certified Infiniti G37 back in December 2014, about a month later, I heard this knocking sound coming from the engine. I called the dealership and informed my service advisor, who told me unless they have the car they can't tell me what is wrong. The knocking became louder and the car then began to do this stalling motion, jumping out like the transmission was slipping. I decided to record the noise and send to my advisor again. My advisor told me that she heard the noise however she can't do anything for me and she cant diagnose unless she has the car. I live almost an hour away from the dealership and you would think my service advisor would offer to have someone come get the car or offer for me to take it to Nalley Infiniti incase the problem was causing damage to the engine. I dropped of my car to Infiniti of South Atlanta to have them duplicate the issue, needless to say they kept my car for about and hour maybe 1/2 a day and then call me and say sorry we can't duplicat
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