Yes sir I'll help you out with the meter settings through my friend as im not in the country right now, I'll drop his WhatsApp number and you can ask him to guide you with the meter options.
As far as the electric seats go, finding these is extremely hard, let alone finding RS electric seats as the RS has its own specific sports seats, and if you did manage, i wouldn't advise you to do such an extensive job from local electricians with a car such as a new Vezel, I wouldn't trust it and I'd advise against that, plus the cost would probably be unjustified too.
As far as the nav system, my own personal 2015 Z had the original Honda system just like the one in the american Honda Civic, only then do the call answering buttons work. Maybe you could try getting a branded pioneer unit with android auto and apple carplay, but as far as i know these local Android units aren't compatible, you'll likely need the Honda unit, iske liye thori si khwari karni paregi but you can find these phir bhi. Any further questions, please do let me know.
As for your meter settings contact my friend over WhatsApp +923348653252, Abdullah. 