Easy with the "reality check" there Chris

... I think if you take any vehicle through more than 2.5-3foot of water you are taking a wrisk and it is on your own head... unless you've got a vehicle design to handle more than that...
What we are talking about here is a bike that can drown out in less than 1.5 foot of water and can cost a fortune to repair... trust me I know and I've only just got mine back for my efforts.
Spy, you raise and interesting point, one that would be well worth taking up with your dealer if you are in the potision that you bought your bike under a consumer contract and found it didnt meet the reasonable expectations that the marketing material might have lead you to have of the bike.
The really stupid thing is that I'm pretty sure you'll find a lot of road bikes are more able to handle water crossings that the "purpose designed"

BMW is.