Ford 2011 Mariner Owner's Manual page 343

Every 150,000 miles Change automatic transmission fluid and filter
(240,000 km) (except 5–speed TorqShift transmission) (filter
not required on 6F35, 6F50, DPS6 and AWF-21
transmissions); consult dealer for requirements
Change front axle fluid (4WD vehicles)
Change manual transmission fluid (Escape)
Change rear axle fluid (RWD vehicles)
Replace accessory drive belt(s) if not replaced
within the last 100,000 miles (160,000 km)
Replace front wheel bearings and seals if
non-sealed bearings are used (2WD vehicles)
1
Initial replacement at 100,000 miles (160,000 km) or 72 months; every
50,000 miles (80,000 km) or 36 months thereafter
2
Perform a follow-up inspection at 120,000 miles (192,000 km)
2011 Mariner (mrn)
Owners Guide, 2nd Printing
USA (fus)
Scheduled Maintenance Guide
343