Err.. I did say guess.

How can you be so sure that it requires a hardware upgrade? Unless one knows the capabilities of the chips within the computer it would be premature to rule anything in or out.

It may be that out of all the 'older' BMW navigation computers, the Mk-IV unit is the only one that does have the processing power to display improved graphics. We will soon find out, one way or the other.

Paul Martin
Australia