The transmission oil cooler may develop a leak, which will require replacement to repair.
Resources for the Repair and Maintenance of your 2010 Mercury Mariner
2010 Mercury Mariner
2010 Mercury Mariner Problems
If the transmission oil leaks out of left side half shaft area, it may be from a worn axle shaft seal. The seal can be damaged by a poor surface finish on the axle shaft. The axle shaft and seal should be replaced to correct the problem.
Looseness in the steering shaft and steering shaft coupling U-joint can cause a knocking / popping noise from the steering column when turning. The steering shaft and coupling U-joint will need to be replaced.
The check engine light may come on due to failure of the Variable Camshaft Timing (VCT) solenoids. The VCT solenoids will need to be replaced if they are the reason the check engine light came on.
2010 Mercury Mariner Reviews
When I purchased the vechicle, I was told the everything was 100% in good working condition. The vechicle only had 32,000 miles on it. 2 days after I purchased the Mariner, I tried the front defrost switch and there was no heat whatsoever. I called the dealer and they said that they didn't know if the heater problem was covered in the warranty. I checked the heater hoses at the fire wall and both were hot, this lead me to believe that this vechicle had front end damaged and the heater control for the AC/heater vent door was not reconnected. At this time according to the dealer that the A/C section of the box was warrantied but the heater section is not. Does anyone have any knowedge or ideas to help me with this delemlia.......... contact me at . thank you..........
8 months in and so far so good. easy ride. cargo space is a bit smaller than expected. wierd fold down seating.