From inside (document excerpt):
User and Operator’s Manual for 1994 Mercedes-Benz W140 models: S 320, S 420 and S 500.
Contents
Introduction
Product information
Operator’s manual
Consumer Information Problems with your vehicle Reporting Safety Defects Index
Instruments and Controls
Instruments and Controls
Instrument Cluster
Indicator Lamp Symbols
Catalytic Converter
Starting and Turning Off the Engine Driving Instructions
Operation
Air Outlets
Automatic Climate Control Rear Passenger Compartment
Adjustable Air Outlet Climate Control
Active Charcoal Filter