Hello mane,
We don't have BMW diesels here but from what I remember from older Mercedes ones you are supposed to turn the key on for a few seconds (like 5-10, maybe even 15-20 in really cold weather) before turning the engine over to let the glow plugs heat up. I'm not sure if this applies to newer diesels but I don't see why it wouldn't. As far as I know diesels still use glow plugs.
Does your manual or dealer have anything to say about cold weather starts?
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'05 X3 3.0i Alpine White/Gray Leather/Alum. Trim
Sport/Steptronic/Servotronic/Panoramic
Prem. Sound/Staggered 18" Style 114 Y-Spokes
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