Buying from the lot will give you a better value… especially if you buy at the end of the model year when they offer all kinds of discounts. There are still plenty of colors and options to choose from if you do this. I suggest you buy sometime between July and November when they are really trying to clear out models from the previous year and offering discounts.
You didn’t ask, but I think the massage seats are overpriced and not worth it. The options you want are heated seats (if you live where it snows) and ventilated seats (if you live in a place like Florida). Presumably your GLE will be parked in a garage at home and at work, but if you live in colder climates a heated steering wheel may also be worth paying for. Not all GLEs come with a sunroof, which I found interesting. I use my sunroof almost every day. The sun is too intense during the day, but at dusk I have the shade open and at night I open the whole sunroof.
I live in FL and back when I was shopping, the salesman at MB of Pompano tried over and over to give me a deep discount on a car he was trying to move. It was a GLE 43 that had heated rear seats. I told him I will never ride in the back seat of my car and since it is Florida heated rear seats were stupid. He kept trying to push that particular car and I told him, even it was half priced I wouldn’t be interested. Finally he gave up.