BMW 650i heater not working

[Huskyman]

Have a quick look here http://www.realoem.com/bmw/enUS/showparts?id=EH13-...
There is a shut off/control valve and an additional water pump and I would see about getting the climate control fault codes checked.
Have a look here http://www.m5board.com/vbulletin/attachments/e60-m...

What state is the coolant in and is the level correct?

[helix402]

It could be a faulty heater valve.

[chrisgeary]

If you set the temperate controls to maximum, does it blow cold out of the footwell vents?