The "off" position can be to either side depending on how it's programmed. The only difference seems to be that you can adjust the amount of tilt if your "off" position is on the passenger's side.
Here's a quote from the Car and Key Programmable Functions Guide:
Mirror memory, automatic curb parking function (only E46 since 09/99 production)
Dealer programmable, default is "inactive"
Hmm... Da skal det gå an ser det ut som!
Takk skal du ha Lars! Skal se på det når jeg får tid og ligge inn en tilbakemelding her!