One problem related to transmission slip out of gear has been reported for the 2010 Mercury Milan. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Mercury Milan based on all problems reported for the 2010 Milan.
Intermittent problem which occurred at variable speeds (25 mph, 40 mph, 60 mph) with rapidly increasing frequency in the week before the throttle body was replaced. While driving, the engine seemed to shift out of gear. However, there was no increase in rpm in response to the accelerator. Pulled to side of road with very low rpm, the vehicle was turned off and then restarted each time without problem.