Originally Posted by JCL

BMW doesn't sell or recommend block heaters. The last one they show in a parts catalogue is for 2.4 litre diesel from decades back, IIRC.

This has been discussed quite a few times, so a search will show all the relevant posts. In essence, you can put a heater in yourself, easiest to do it in a coolant hose or a stick-on heater on the oil pan, but they aren't required. If you have trouble starting consider a battery blanket, at least that will give you enough power to spin it over quickly, and with appropriate engine oil it will be fine.

Good luck.