While just using an exposure/brightness slider to lighten up the shot probably won't work, if you've access to a "Levels" tool or a set of sliders labelled "Shadows/Midtones/Highlights" or similar, I suspect you might be surprised how much green you can get from the background without blowing out the whites on the car. This is best done if you've a RAW format version to play with, but even experimenting on a downloaded version of your photo this approach, to me, improves it.

There again, I know sometimes a little voice in the back of my head says "Leave it dark, I like it like that" and perhaps you are hearing the same with this shot.