Collected from other forums or my own observations. I'm sure there are more but here are things other OB wagon owners always say, "I didn't know that," when I show them. USDM models only - I don't own any other country model per below.

• If you lock the window lock button, the lights on the other three windows go out on the controls and then come back on signifying the windows are 'turned off'
  
• When the lights are on and you adjust the dimmer setting the dimmer setting is diplayed on the trip display; iLL1-ILL6
  
• If you press the lock button on the key fob three times in five seconds it beeps the horn and flashes the lights to help locate the car in a parking lot.
  
• If you leave any door open or the trunk and you try to lock the car it will beep four times to let you know that something is open.
  
• You cannot lock the doors with the key in the ignition and engine off. They unlock again.
  
• When you start the car and the outside temp is below 37 degrees, the console will flash the temp as a freeze warning.
  
• The divider in the cup holders is removable. Twist it counterclockwise and you can take it out.
  
• You can press the control knob for the A & B trip odometers and it will light up even if the ignition is off.
  
• There is a second power plug in the center console.
  
• If you have the rear wiper on intermittant and you put the car in Reverse, it goes on full speed. The rear wiper on the wagon is speed sensitive. The Slower the speed, the slower the intermitten span, as you speed up, the span gets shorter.
  
• The sun visors have plastic panels you can pull out about 6" from each inside end to cover the whole side window or close the gap between them.

Nice but some of them wont work with the european version (everything with the horn).