hi guys, I have had a similar problem on my 147 as well. first of all, I tried doing it the old fashioned way ie not reading the instruction book.

with now success but then last ditch solution, get the book out!
I got it to the speed I wanted, turned the button from off to on, on the lever and then pressed set and nothing happened sadly
I have to say I didnt turn the other ring with the plus and minus on? is that vital part of it?
In the book, it says about little light coming on when it is engaged but couldnt get it to do this.
Am I doing it correct? If so, is it likely to be a fuse issue or is it trip to the dealer?
or am I doing something blatantly wrong?
cheers
jules