The wing and fuselage colors seem to be balanced out pretty well, but the cowl green is much too deep and unnatural as a camo scheme.
Also, take heed that the colors of the fuselage is distinctly different than the wings, which doesn't seem to be much noticeable in your case.
In almost every case, a model is a much better source for determining colors than a pure profile pic - the modellers themselves are researchers of color schemes, not to mention that they also provide some great insight on what kind of weathering is applied where.
IMO, the weathering you've applied for exahust fumes are much unnatural, and sort of stands out - as compared to the general quality of weathering on the rest of the plane... which is very clean, and seems unlikely for a D-9 scheme of such late war era. Notice how the model looks overall clean, but delicately "beat up", which gives out a nice aura of what kind of condition the aircraft is in. These are one of the subtle details you must pay attention to.
Judging by the Hakenkreuz on the wings, this is a '45 craft, and I'm quite curious what kind of Hakenkreuz you've used at the underside of the wing. Common mistakes are made at that part.
All in all, try to make it look EXACTLY like the model - it would offer good results and much higher quality of plane depiction.
