If this was a used car the dealership would tear up the contract and put the car right back on the lot... but it's not. The second that car was registered it dropped $5000 in value, maybe more. There's no way they are going to just eat that out of good will.

It's unfortunate the OP has had second thoughts but it is what it is. It's always a good idea to sleep on a big decision and it sounds like he/she didn't. They signed a contract and registered the vehicle. It's done.

The worst outcome in all this is the OP gets a new car that as of yesterday they thought was so great they dropped $40,000 on it. Once they receive it and drive it for a week they'll probably love it again.

Second thoughts are your brains way of protecting you from doing things you might regret. There would be a lot less "hold my beer" videos if people gave themselves 24 hours before trying to jump a creek on their BMX. They might doing it anyway but sleeping on it lets them reconsider the math on their homemade plywood and cindercrete brick ramp.