Diesel Exhaust Fluid

Hello ALL. I purchased a used 2010 X35d last December and had a question about the Diesel exhaust fluid. Does the ECU/Service monitor alert the driver when its time to change out this fluid. I read the manual and it shows that the fluid should be replaced every 2nd oil change but I am not sure when it was done last. I am due for my first oil change this month and I just had to refill the exhaust fluid with one bottle for the first time.



Also, how often do you guys replace the fuel filter in the diesel X5's?



Thanks!!