I want to hear opinions on changing the Transmission Fluid. I have a Volvo S60 2012 about to hit 80k miles. I called my local dealer and they don't recommend to change the fluids and they don't do that. Is that true because they say it's "lifetime" fluid. And all fluids eventually get dirt. I want to be able to reach 150k miles and don't want my transmission to die on me. I wouldn't flush it but I would just drain it and then add the amount that comes out. Also seeing that there isn't a dip stick for the fluid in the engine bay, what do you guys recommend?