Not for a while. From my VW service manual (model years 1999-2005), p. 28b-3: "Preglowing is not linked to operation of the driver's door as in some earlier V

Not for a while. From my VW service manual (model years 1999-2005), p. 28b-3: "Preglowing is not linked to operation of the driver's door as in some earlier VW diesel systems." In my experience, it's got to be pretty cold (well below freezing) for the warm-up time to be over 1 second.