I have taken my 2015 Chrysler 200 to two Chrysler dealerships. One dealer I took it to was 3 separate visits. They had my car for a week and a half and misdiagnosed it. Replaced a right CV Axle shaft and it did not correct the issue. They stated they took the entire front end apart checked everything. They released my car to me not fixed. Now its at another Chrysler dealer and they are still trying to locate the noise. All mechanics hear the noise they just don't know where it's coming from. One of the service managers did confirm it is from the engine. Being it happens when RPM switch. This is so fustrating. These people seem to know nothing. My Warranty is running out. Anyone know what is could be or have had this issue.