> I just replace my rear break pads and and want to reset the warning but I cant get this to work

I believe the BMW brake pad wear sensors are one-time use only, and must be replaced if they have triggered the warning light. Did you replace the sensor when you did the brake job?

Number 12 in this diagram:


http://www.realoem.com/bmw/showparts...85&hg=34&fg=10