Mercury Mountaineer 2002 Owner's Manual page 313

Filling station information
2
Ensure the correct automatic transmission fluid is used. MERCON and
MERCON V are not interchangeable. DO NOT mix MERCON and
MERCON V. Refer to your scheduled maintenance guide to determine
the correct service interval.
3
Indicates only approximate dry-fill capacity. Some applications may vary
based on cooler size and if equipped with in-tank cooler. The amount of
transmission fluid and fluid level should be checked by a qualified
technician.
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