Citroen C3 2013 Car DVD Player With Navigation (Free Backup Camera)

Highly Recommended!!! CarPlay is a smarter and safer way to use your iPhone in the car, allowing you to stay focused on the road. When you connect your iPhone wirelessly to CarPlay feature of the head unit, you can get turn-by-turn directions, make calls, send and receive messages, listen to music, and more 

Android Auto is a system that integrates your phone into your car's entertainment system. It can mirror the phone's screen on the car's display screen, allowing drivers to control their phone using voice commands or the car's touchscreen to minimize fumbling with a phone while driving.

​​​​​​​​Learn more at the link below

https://www.apple.com/ios/carplay/

DAB is Digital Audio Broadcasting. Not available in the US. List of the countries below 

https://www.worlddab.org/countries

Onboard Diagnostics II (OBD2) is a diagnostic system. It is used to check the engine and other vehicle systems and communicate all the possible glitches that happen to them. It can show you the fault codes of your car at the head unit’s screen via an app.

https://www.sigmacarstereo.com/obd-ii-diagnosis-adapter