Hi
It's worth mentioning that you can change an old headunit for a new one, which s cheaper then changing car, and usually the new headunit is capable of more features, such as dvr, rear camera, tpms etc. Just google xtrons, but there are many other makers
Also, I believe a lot of modern headunit are capable of mobile mirroring, to use the sat nav (or other features of mobile device)
Many thanks
John