galileopan

It used to be that some kinds of problems (mostly consistently demonstrable ones) were easily diagnosed and predictably (if not necessarily cheaply) fixed, while others — particularly intermittent electrical faults — were a predictable torture sentence of repeated dealer trips with "no trouble found" dismissals.

How good are modern diagnostics at tracking down intermittent COMAND problems? I have occasional failures like "completely blank screen" or "failure to activate backup camera (even though mechanical cover opens)" that are cleared by a restart of the car, and I'd like some idea of where on the "abandon all hope ye who enter here" to "no problem, they'll read out a trouble code and replace the faulty part" scale I'm likely to be.