One problem related to transmission not go into gear has been reported for the 2010 Mercury Mariner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Mercury Mariner based on all problems reported for the 2010 Mariner.
I was trying to accelerate at a stop light and the transmission (?) did not engage. When I came to a stop light the car jerked like it was it could not switch gears.