might be a loose connection or faulty water level sensor or it could be the dreaded wiring harness, I would definately keep an eye on the water level, sometimes justa little less water than normal can set it off. Top it up witht he car running and see if that helps...
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.