Originally Posted by deluxe 247
I believe per the owner's manual BMW recommends immediately driving so the transmission and engine warm up together. I usually wait about 10-15 seconds and stay under 3k rpm till i'm at 160-170+
This. The manual for my 325i says to start driving immediately at a moderate engine speed. With that said, I've always let my other cars "warm" up a bit before driving. Maybe this is only towards those who have their cars inside of garages?