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Canonite · 21st April 2019, 07:34

You need to understand what you have.
The Highline is the TV & Satnav Bordmonitor, the radio and video tuners in the boot.
The Harman Kardon is just a speaker upgrade with an amp and subwoofer. There is no Harman Kardon head unit.

If you are wanting an aftermarket double din, you’ll need the 17 pin BMW to ISO harness adaptor, and you will also need a 5m aerial extension to run from the boot to the new head unit.

21st April 2019, 07:34	#10
Canonite This is my second home BMW 330d Tourer, MG ZT 180 SE XPG, VW Polo 6R 1.2 TDI Bluemotion Join Date: Jul 2011 Location: York Posts: 6,022 Thanks: 363 Thanked 574 Times in 319 Posts	You need to understand what you have. The Highline is the TV & Satnav Bordmonitor, the radio and video tuners in the boot. The Harman Kardon is just a speaker upgrade with an amp and subwoofer. There is no Harman Kardon head unit. If you are wanting an aftermarket double din, you’ll need the 17 pin BMW to ISO harness adaptor, and you will also need a 5m aerial extension to run from the boot to the new head unit.