Cluster of small issues

2016 Superb wagon with all the bells and whistles. Lovely car with a perfect balance of

utility, comfort and more than adequate power. It's a162Kw with about 90K on the clock. Lately the car has developed some "idiosyncrasies".

I think I can account for the intermittent start button as a chronic Superb issue and it'll need replacement in time.

That said, though, sometimes the doors won't lock on finger touch, the reverse camera image doesn't show up 

now and then and the collision warning system gets oversensitive. My HVAC system played up too but I reset the system

(thanks Briskoda)  Is it likely to be one element of the system beginning to fail? Is this a common pattern as the

car ages?

Thanks,

Michael