I just purchased a 1988 4WD 5-door 6-speed wagon with 1.6L to use as a
utility/camping vehicle, and noticed on the operator's visor a caution to
"disengage" the "Real-Time" 4WD if one end of the vehicle is raised for any
service that requires rotating the wheels, yet I can find no such control to
engage or disengage the 4WD on demand.

Can someone tell me how to observe this caution please?