Let me answer your questions before this thread is moved to Off Ramp or Marketplace, where it will get lost. 
Costco won’t do anything for MB (I am a Costco member, inquired already). Sam’s club and AmEx may get you cash bonus, but it’s meager $500 last time I checked it for GLE. Still better than nothing, so if you have Sam’s and AmEx, look up incentives online, you should be able to print the offer code and take with you to a dealer (if they still take those two, which they may not anymore).
81K is on upper end, I have seen them for 73K. Dealers could order them for a base MSRP of 68K, but I have never seen one at base price on any lot I searched recently.
In any event, if you want to search for cars on market, go to cars.com, select make, model and “new”, go to advanced section where you can limit your search to 2024 or keep 2023 option open. Once you choose radius for search scroll down and select the color combination you want. You can select black exterior and beige interior, it will bring up all GLE’s within the radius you chose. You can further narrow your search by checking 450e plug-in on left column, you will see every single car in the radius with color combination you want.
Sunroof costs only 1400 or 1600 if it’s an option. GLE’s come loaded as base version, so a lot of add-ons (except panoramic roof, heated steering wheel and may be one or two other options) are just means to overinflate the price with no particular value added (at least for me and in my humble opinion). You will probably find something for 72-73000, but inventory constantly fluctuates, so cars appear and disappear on daily basis, and if you have time just browse the selections until you see the car you want and like.
There is 7500 rebate on EV vehicles and it applies to GLE450e, it’s a tax rebate if you purchase (income contingent), and direct credit by MB if you lease (regardless of your income). Some dealers outright refuse to sell below MSRP and even try to sell the car by saying “we don’t mark up above MSRP”. There is a general perception that this car is “hot”, it is so “hot” that no one needs to offer any discount on it. This is not entirely accurate perception, some dealers struggle with GLE’s and most recent rate hikes don’t help them find willing fools to make disproportionately large LTV investments into this car when you can get much better deals from BMW and Porsche. So, do your research and ask for discount on top of 7500 EV rebate, some (not many) dealers will be willing to work with you if it’s the end of the month.
You can go to edmunds.com, they have a forum for each make and model, moderators there answer in real time any MF, RV and incentives related questions.
Autocompanion here has a nice lease calculator, in case you want to see what your lease options are, and I don’t know about all makes and models, but they seem to have a calculator that accounts for any existing incentives and also tells you what that incentive is and how long it will be valid. Can’t vouch for accuracy, but helps to speed up calculations and you can always check elsewhere to verify if those incentives are still valid (i.e. Edmunds and etc.).
