Hi
I have a 335d, turbos go the whole time, I would certainly follow the guidelines re run in, however don't get too paranoid.
My car definately warms up, but very quickly, I always use the heater as a guide if your getting hot air in the cabin - its warm, and then I give it a few more minutes, however the good news is with a 335d its so powerful you hardly need more than 3000 rpm...
Cheers
stu
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