Last night while driving about 70ish on the freeway with our 2012 ML-350 Bluetec, the check engine light came on steady. The vehicle ran just fine, no difference in performance or odd noises. Read the codes this morning with 2 different OBDII readers and they both showed no codes stored! I started the car and the light stayed off. The rig had been sitting for about 8 days while we were on vacation, so I'm wondering if this had anything to do with it, or if it was a fluke, or????

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2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)