Hello, I have a 2012 Mercedes Benz GLK 350 model with audio code 523. I would like to know if a navigation upgrade can be added to the car. VIN WDCGG5GB3CF746825
Too much hassle. You will need to add GPS receviers to make it work. Plus your head unit will need to upgraded.
You will have to change the head unit and install GPS sensors to the car which is very expensive.
The cheaper and also the better option would be to go with an aftermarket head unit that is designed for the GLK. Those units usually run on Android, come with GPS, Bluetooth and are far better than the stock in my opinion. Check these out.