Te red bulb is an alarm light. It was installed on all of em regardless of wether the alarm was installed.
Email TheBMWPartsStore.com. They do VIN package decoding. It can tell you every available option your car came with from the factory. I did it and it was great.
For technical data about the vehicle go here: http://www.bmw-z1.com/VIN/VINdecode-e.cgi