Thanks for setting me straight on how to check the voltage correctly.
Ray,
Thanks for such a good explanation, it was that which led me to look for a mainline fuse. I traced the power wire from the MMI fuse box back to the battery output side where I discovered a 60A bar type fuse that I didn't know existed. It has blown, see attached photo. So hopefully I'll find one of those at a local garage and see if that restores the system.
Regarding the park brake fault, I haven't driven the car yet but I applied the park brake a few times and the message on the DIS has disappeared. I'll hook up VCDS tomorrow and see if it'll let me clear the fault codes.
Thanks again for your time Gents,will post back once I've done the work and let you know the outcome.
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