Simple and sure ways to tell what options you have (for all years)

Packages:
Premium - leather or BC button on radio
Sport - black headliner, aluminum window sills
Cold Weather - heated seats
Rear Climate - privacy glass or temperature control on rear center console

Options:
Automatic Transmission - ...
Xenons - you can tell...
PDC - sensors...
Sport Seats - highly bolstered/shapely front seats
Comfort Seats - very large seats
Heated Steering Wheel - button near cruise control (I/O)
Rear Heated Seats - two buttons under rear vents
Navigation - obvious
Moonroof/Panoramic Roof - ...
Rear Air Suspension - compressor under spare tire
Adjustible Suspension - buttons right of the light controls
Premium Sound - DSP written next to Audio button
Servotronic - hmm...light steering feel...
Rear Sliding Floor - floor not flush with lower tailgate
Tire Pressure Monitor - RDC button next to PDC button
Rear Side Airbags - rear door upholstery has creases/sections with airbag symbol

these are all i can think of

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