I am planning on a road trip with my Benz tomorrow and I need to figure out why my glowplug light flashes. This has happen 2 other times and again today. When you turn the key the glowplug light comes on as usual. Once the engine is started the light flashes 3 or 4 times. The car starts and runs fine. I have read that a flashing light before the engine is started, indicates a bad glowplug, what about after the engine is running. Is this something I should be concerned about? Thanks

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member