Yes, the keycard is excellent it wont wear holes in yor pocket. It stays in your pocket and the door handles pop out when you approach the car. Also leaving it self locks. There are 2 small buttons on the back of the card for lock\unlock. I guess you wil not need them.
The test car was a Techno, and it does have folding mirrors when you walk away and it locks.
I always jack the seat up when I get it in, usually as high as possible. It is not too bad for getting in and out, and I loved it. I only noticed the seat difference and ride height when I got back to the 2008.
If I had not stepped back in to the 2008 – I would have said it was a good driving position in the Megane.
I stopped at a few places with kerbs and got out no problem.
You will only know if its for you when you go for a drive.
I may be able to get in and out of the Megane NOW….but give it 6 months or a year it may be very diffferent.
Health issues generally get worse rather than improving.