Oil - Every year just BEFORE I park the car for winter hibernation
Antifreeze - Check it and replenish before winter parking
Brake fluid - Every other year
Power Steering fluid - rarely. 8-10 years if at all
ATF - rarely , 5-8 years
Rear Axle - check annually before parking, change 4-5 years
Fuel Injection pump - never (280SL)