Yeahbutt…...You turn the key, the glow plug light is lit, then goes out signifying that the plugs are nice and toasty. Then you wait another 50+ seconds for the dash to settle, all the while the glow plugs are surrounded by cold cold metal that sucks the heat out of them.
It seems more appropriate to me to strike while the glow plugs are hot, rather that concern yourself with the ECU completing its gyrations. Just sayin'.
Not sure, starting is never been a problem but then again my Sprinter is garaged not sure what the temperature for glow plug activation. But I do know the glow plug activation is determined by ECU via engine coolant temperature.
There's a whole bunch of different glow plug functions and confident ECU will make the necessary adjustments.
• Preglowing:For reaching the start temperature of the glow plugs more quickly
• Start-ready glowing: Ensures that the temperature is high enough after preglowing and until the engine is started
• Start-upglowing:Stabilizes the starting speedof the engine
• Afterglowing: Improves engine running after a cold start and the warm-up characteristics of the engine
• Diagnostic glowing: For system diagnosis
• Diesel particulate filter (DPF) glowing: Supports
regeneration
• Emergency glowing: Initiated in the event of
problems with communication over the Local Interconnect Network (LIN) bus.