Lincoln 2013 MKZ Owner's Manual page 226

WARNING
Exceeding the Safety
Compliance Certification Label
vehicle weight rating limits could
result in substandard vehicle handling
or performance, engine, transmission
and/or structural damage, serious
damage to the vehicle, loss of control
and personal injury.
GCW
E143819
GCW (Gross Combined Weight)
- is the weight of the loaded
vehicle (GVW) plus the weight of
the fully loaded trailer
Load Carrying
E142524
GVW
223
GCWR (Gross Combined
Weight Rating) -is the maximum
allowable weight of the vehicle
and the loaded trailer -including
all cargo and passengers - that
the vehicle can handle without
risking damage. (Important: The
towing vehicle's braking system is