Oh yes, on this business of BMW warranties.

At great risk of someone trying to shoot me down (which does not bother me in the slightest) there is quite a bit of opinion among the UK Beemer riders that I know (and I know a few via the UK BMW club) as follows.

Modern BMW bikes are not really all that great on reliability (no statistics here, remember this is an opinion which has been expressed to me in conversation by owners of BMWs, principally 1200GSs) but what they are good for is the warranty cover. It is the "great" service under warranty which leads to the reliability reputation + the BMW history of earlier models.
There are shedloads of 2 year old 1200GSs on the forecourts of BMW bike shops here in the UK, because the owners change them over every two years and, thereby, have a permanent warranty cover which includes comprehensive breakdown cover anywhere in Europe.

The reason I mention this is because I can't see why your dealer is unsure if work can be done under warranty.
As a reality check (this is definitely known to me) one dealer here in the UK will take every opportunity to carry out work on bikes under warranty and charge that work back to BMW Germany - it is as simple as that over here; they just love poking around on one warranty claim, or while the bike is being serviced, in order to find anything else that can be done under warranty.

IMO then, you put the pressure on your dealer and get everything possible changed/repaired under warranty.

Hope this helps a bit,

__________________
Dave