In 1983 BMW did a VIN survey of production cars and these are the gospel.
This Tii was VIN 2700177, a very basic Chamonix white version with minimum equipment, built April 20,1971.
Here is how to remove the main vent in the faceplate.
The 2002tii has long needed an A/C kit that really works. I hope somebody comes up with one sometime that won’t need this special pulley.
For Behr A/C setups, only the dealer had these documents originally.