Mmmm - unless its a well known BMW dealer in the Bristol area - who, when a problem was reported with the accuracy of the system (basically my system was all over the place - wrong roads followed and map pointer out by several hundred yards) installed the V25 update to fix the problem and charged my £45 + VAT (tax) for the privilege - even though the nav was less than 3 months old and had never worked correctly.

It was actually a wrongly wired pin on the loom - no wheel sensor info to the nav computer.

I asked about upgrading to V26 and was told by them it would be £99 + VAT - Jacksons in Jersey did it free AND topped up my oil and washer bottle for free.