Replace the car seat. I don't see how else you are going to kill the smell because the seat will be so throroughly impregnated with the wine. Possibly you should remove the seat and utterly drench it with appropriate cleaning materials to flush the wine out.
But more to the point, don't you know that alcohol is sinful?
... kidding...!
__________________
Jonathan Hunt
Elder holding forth the word of life at:
Cheltenham Evangelical Free Church (Confessionally Based)
Cheltenham, Gloucestershire, United Kingdom
Logic is a systematic method of coming to the wrong conclusion with confidence.
-- Thomas Elsworth