Here are a few threads that may be helpful to those in the community who are interested in how to deal with and improve our bmw diesels filtration system.
It should be noted that the only way I have been able to initiate the fuel system to engage the low pressure pump to flush a new filter is with the Bavarian Technic tool. Using the start/stop button does not work on my car. And since the HPFP is lubricated by the fuel, if you change your filter and do not prime the system you will be running it dry until it gets fuel in there (a very, very bad thing to do for the health of the HPFP). You can tell if the system isn't primed properly if you have to "crank" it more than normal before the engine fires up. If the system is properly primed it will start without delay just like a normal start.