Its not hard. The dealer should be able to figure it out pretty easily. We do them all the time @ my dealer. It should come up correctly if they are using your VIN to look up the part. There is a specific windshield for HUD.
2013 Alpine White F10 535i. JB4 S2, Quad Tip Magnaflow Exhaust, H&R Springs
2011 335ix Le Mans Blue w/ M Sport SOLD
2003 Turbo Cobra 765rwhp/650rwtq 9.77@126 pump gas, lifting @ the 1000ft mark