F30 330d 8 speed auto question

[cycle tramp]

I've got a 2 month old 5000 mile 330d with the 8 speed auto.

I find that regardless of mode, it changes gear at 4500 rpm. So even in sport plus mode, gearbox in manual, it changes automatically at 4500rpm. Now, this doesnt seem right to me - in manual mode, same box, my M135i would just go up to the limiter and only change up if you pulled the paddle.

I though the 330d should pull up to the 5500rpm redline in manual mode, and this is confirmed by some of the roadtests I have read.

Typically, BMW cant help. Can anyone please tell me if there is something amiss with my car, or is it supposed to be like this (meaning BMW have pulled a fast one and prevented access to the last 1000rpm of this motor?).

Thanks

[cycle tramp]

"Surely in manual mode it should not change up ever. Down, yes, to prevent stalling, but it should not change up, just hit the rev limiter"

This is how I expected it to be. Not much point in the manual option otherwise. I know it may not be optimum to rev the the nuts off it but I had expectations of a higher revving capability than usual 4 pot diesels (I know its a six!!) and many reviews have confirmed this capability. Its my car and I want to explore the performance throughout the rev range, at which point I'll decide what rpm to change gear at according to my butt dyno.