This just happened to me today while at work it has been raining here in Houston the last couple of days. I have a 2015 Mercedes Benz CLA250 when i got in my car to go get some lunch i turned the car on and it did not start but everything else did (radio,ac, etc.) i turned it off and tried again this time the car did not start but the message popped up saying to not shift gears and to take to a dealership. I tried it one more time and the car started the message came off but my engine light is still on. I took the risk to drive it down the street and it worked fine. I parked it turned off and on and it was fine (engine light still on). I just wanted to see if anybody had advice as to what i should do.