Deal check: 2020 Mercedes Benz GLC 300 RWD. Deal or no deal?

Finally found the missing money!!!
The deal has a 12.8% off MSRP, $1150 down payment and tax credit incentive on the selling price $43000, dealer provided 1.5% rate that equated to $645 in taxes.

To incorporate “Texas 1.5% tax credit” on the lease calculator, I had include the $645 to the selling price. I referred lease copy shared on below thread and it looks like dealers in TX is adding the sales tax to the gross capital cost.

Here is the updated lease calculation

I guess, first thing i have to do is negotiate a deal without a down payment and even then, this deal is still not great, correct ?

Also if I lease a vehicle out of state, will the dealer/broker use MF and RV values from their region or will it be Texas values ?