Hi I haven’t yet, I took it to my local Hyundai dealership but there was no mechanics there at the time, I spoke to one of the sales team there and they didn’t have a clue either, they said to bring it back to them when there’s a mechanic in, as they will more then likely have to plug it in to update itHi, did you ever manage to update the Nav? I'm trying to work out how I go about doing the same in my Hyundai ix35. The lack of postcode function is a paint. Thanks