To start off, I say "intermittent" in reference not to things not working, but actually working. In the past few years, my 2010 G37x sedan has been giving me some interior feature fits.

First, the front door locks stopped responding to the remote and the switches (recently for a time they started working again then stopped).
Then the cruise control would not accelerate or set a speed. Hasn't come to life again yet but TBH have not tried often to see.
The latest is the steering wheel--it will telescope but will not usually go up or down.

My limited automotive forte does not cover electrical issues. It does seem like the features above would work if they got consistent power. Could it simply be fuses?