Indeed, need to get alot more colour difference, hardly any shades or tones (light), also i think that bg is off as well. Think it needs to go more clockwise.
Nice ideas tho!
That background does not fit at all, sry.
Look how high above the ground the car is on the right side and how low it is on the left.
And the car looks toony, because a red paint has way more refs than yellow.
The rims and the sidevent fit very well though.