End of lease buyout, other Q's

I have a 2016 S550, leased 4/48K that ends September 2020. I've had no major mechanical issues, and get regular maintenance. I love driving the car (a little too much, haha). Maybe this is a little early to think about all this, but... I've been waffling on buying at end of lease or turning it in, here are my issues:
- end-of-lease buyout $49K
- current mileage is 48K. driving the same, I'll be over miles by 6-7000 at end of lease, so mileage penalty ~$1,700.
- 2 door dings that were "too expensive" to fix under the PDR warranty (which is worthless if you ask me).
- Otherwise, the car is in great shape (garaged, regularly washed/detailed, etc).
I leased the car initially out of convenience, and I like switching cars every few years, so it made sense at the time. I've grown attached to this car though hehe. Also, the end of lease charges are going to be annoying, with turn-in-fee, mileage, wear and tear (those damn dings). I'm thinking it'll be $3K+ at lease end. I'm wondering if it would make more sense to just buy the car, hopefully for less than the residual, and get CPO or extended warranty? I know I could lease/buy a new S450/S560, but the lease offers aren't that great, and I don't see enough of a difference with the new vehicles. Maybe the 2021 model will make me think differently but that doesn't help me next year

Thanks!








