I think most of us are happy changing ATF at 50,000-75,000 miles.At what miles do you change transmission fluid on a 2014 300 C car.
No.Also, is t recommended to use a dealer?
Transmission flushing, so far as I am aware, in never recommended by any manufacturer. Although transmission shops love to do it because it's easy and very profitable, there's no real justification for it. Any dirt that is "stuck" to a surface or component in your transmission, meaning, dirt that would not be held in suspension and drained away when changing the fluid, is generally static and not doing any harm. Pressure flushing the transmission to try and remove static deposits places the dirt into circulation, where it could clog a passage or cause other damage.Can local place who uses Flush approach ok?