I have experienced numerous instances of the vehicle remaining in run mode after I push the stop button to shut it down. This only occurs when the ess (engine stop/start) is enabled. My initial belief was that the ess was restarting the vehicle. Upon further observation, I now believe that the vehicle is ignoring the stop button input. I realized that this is a safety issue when the vehicle failed to shut down at a gas station and I refueled with the engine running. I failed to realize that the vehicle had not shut down due to excessive noise in the area. The vehicle fails to shut down under these conditions: 1.the vehicle is running and the ess is enabled. 2.I pull into a parking position and hold the brake long enough for the ess to begin the stop engine sequence. 3.I push the shifter into park as the ess is in the stop engine sequence. 4.I immediately depress and hold the stop button. 5.the vehicle fails to shut down. The vehicle will not shut down until the stop button is released and pushed a second. I estimate that this happens to me approximately 20% of the time I attempt to shut down the vehicle with the ess enabled. This never happens when the ess is disabled. I have taken my Grand Cherokee to the dealer and a star case was created at fca. This failure to shut down was demonstrated to the mechanic on my vehicle and on another Grand Cherokee from their lot. Fca acknowledged that the failure to shut down situation does occur as I described. However, fca has not indicated they are taking any steps to correct the problem. Fca seems to be indicating to me that the solution to the problem is that I need to be more careful. I do not find this to be an acceptable answer. I believe that the ess under engineered, under developed and lacks the sophistication needed to be safely used.

- Coldwater, OH, USA