Hi. Ive some bizarre things happening in my car and was hoping someone could shed some light on potential fixes. 
I had a Kenwood DNX521 DAB fitted professionally around 6/7 months ago, for a while everything was fine, then occasionally the unit would stop recognising the ipod whilst it was playing. Also on turning the car on, sometimes the MFD wouldnt display audio options. I assumed that this was all down to loose connections caused by the bumpy roads around here, and whilst annoying, werent a big deal. 
Recently, things have been getting worse with the same symptoms and some more which l cant ignore. These are all intermittant faults so l cant pin point why theyre happening. 
Occasionally:
The stereo doesnt turn off when l remove the key from the ignition. 
The car struggles to 'catch' when l go to turn it on. 
The folding mirrors take a long time to activate. 
The windows dont open/close with one touch on the switch in the car. 
Last week, the electrics reset totally. Headunit needed settings re-doing and the MFD showed the time as 0:00 and the trip mileage was at 0 too. 
I know l need to get the car scanned etc, but lm hoping for some advice or pointers what to look for when l get this done. 
PLEASE help, its doing my head in!
Ben.