Hi Scotty. I have a 2015 Mercedes GLA250 FWD. The backup camera only works 1/2 the time and my trunk mounted woofer is making strange noises. The nice mechanic lady said it can only be diagnosed if I bring it in when the camera isn't working (and of course it was working that day.) The computer codes say only that there is a communication problem with the camera. The backup camera was replaced once under warranty.
thank you!
It probably didn't occur to the nice "mechanic" lady that the hatch wiring harness is faulty.