Just wondering ... if a D4 does NOT have SatNav installed, what is involved in fitting it?
Is it simply a matter of installing a SatNav equipped head (as available on eBay)in place of the existing unit ... or is it a bit more complex than this.
For example .. could a 2014 head unit be installed into a 2013 D4

PS .. I am aware of alternates such as Apple Carplay and Tesla.