Im not sure abut the actual screen trim, but start by removing the whole monitor screen. THere will be 2 T20 torx bits that are holding it on at least on the 3 series there are, not sure about your car.
And yes it does creek, even the navigation one does. Im in the process of fixing this myself.
335i MSPORTJB4*CHALLENGE HIFLO DOWN PIPE*WAGNER FMIC*ER CP*CUSTOM MODIFIED MUFFLER*H&R SPORT SPRINGS*M PERFORMANCE INTERIOR*M PERFORMANCE LIP*M PERFORMANCE DIFFUSER*19"TSW NURBURGRING*20% TINT*HARDWIRED ESCORT 9500IX*HARDWIRED DASHCAM MINI 005