Complementary colours are pairs of colours that contrast strongly when compared to each other.
The blue-green of this car calls out for more red rather than yellow in the picture, or else the orange-yellow in the trees requires more blue tones in order to demonstrate the complementary colour contrast.
Check some of the forum discussions on complementary colours for suggestions on using colour for contrast.
I really like the low angle you took this from. the inclusion of a strip of pavement really helps. colors are a bit too muted for me... looks like there's a blue cast to this photo, which if fixed could improve its impact.