Just a quick post for anyone considering fitting the new 2016 Composition Nav unit to a Rocco that comes as standard with the Older style head units.
It does not fit, the new units use a slightly different Quad lock connector, I tried to plug in my RNS315 into my to check it works to find out they are no longer compatible, sure you can mod the connector but then you may have code issues I believe they are now linked o the VIN