Adding to what Scott pointed out. Some points of interest with the ME109. either Nose down or Tail down. The wing might also have some sheering from the stress of the crash. Landing gear..... Did the other break away??? If so the other would most likely have gone as well Messhirsmit wasn't know for sturdy landing gear. one way to show this would be a bigger pic of the overall seen. Right now I'm hoping for failed to go down.
On the pilot. How having him running away and some smoke in the area of the plane, it would add more Drama to the scene. other wise he looks good.
I agree that maybe something to simulate the spinning prop is needed. But then again I do leave the prop as is on many occasions for inflight my self.
A note on Markings. Though well applied I'd go for more generic markings for my downed/loosing Aircraft. Though Luftwaffe aces had some interesting marks for their planes the Arrow (Rudel) and Tilde( ~ Hartman) were not common to other Aircraft. Just mainly the Aces and Staffel commanders (usually aces by the time the P51D entered service) To note Erich Harman the pilot of the aircraft downed in you DIO was only shot down once in his career, in a dogfight Between his Staffel and 60 Soviet aircraft (30+ IL-2's, and a mix of YAK-30s and MIG-3s). The funny part is he was brought down by artillery fire.
Don't mean to sound picky, hope this helps you out in later models and dioramas STUG