I recently noticed that my speedometer seems to "stick" when I first start moving, but then moves and seems to be working normally. Car has 115k miles and the problem just surfaced in the past week.

Is this the speed sensor on the differential that needs to be replaced or the symptoms of a cluster problem?

Has anyone else experienced this?

That sounds more like a problem in the cluster. A bad speed sensor is going to affect operation of the speedometer at other speeds and it will affect the ABS/ASC system (most likely thorowing a fault light).

i dont mean to steal this but i have the ABS problem, you just need to fix the speed sensor to bring it back to normal or what?

i dont mean to steal this but i have the ABS problem, you just need to fix the speed sensor to bring it back to normal or what?
Your problem is either going to be a bad wheel speed sensor, or a bad ABS module. A dealer or well equipped indie can read out the ABS module faults and tell exactly what's failed.

do the visual test on the instrument cluster.

test #2

http://www.techbmw.com/forums/showthread.php?t=2

I have the same problem with my RMP. Once the car is warmed up, the RMP needle starts to work.