VW Audi Seat Skoda MDI Cable for iPhone 4/4S - Genuine VW - Red Type 000051446M
Used in my Golf GTD mk7 to add additional iphone connectivity (album artwork, track/artist/album select etc.)
I used an old iPhone 4S as a car ‘ipod’ but I’m sure with a 30 pin to Lightning adaptor you could use your current iPhone.
Recently traded in my GTD so no longer have use for it. There are a lots of various cable types sold to do this job but a quick search through VW forums will show that the majority do not add the functionality sought.
These ‘red’ 000051446M cables are pretty rare and are on sale for over £60 on Amazon.