Nicely fits the challenge. The image is lacking that luster to win. As someone else said this would have been a great selective saturation photo. Then you could have took the attention from the cars in the background and made the focus of your photo the yellow convertible. I believe the other cars in the parking lot just take from the subject.
I like this retromobile.... If it was mine I'd have the stiing sun over the Pacific Ocean in the backdrop and not care too much if the picture came out alright or not! It would be an beautiful sight for sure!