One problem related to tank assembly has been reported for the 2008 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mercury Mountaineer based on all problems reported for the 2008 Mountaineer.
Just noticed a small gas leak happening over the past week or so. Gas just intermittently drips behind left rear wheel regardless of whether the tank is full or partially empty. Cannot see where the leak is coming from.