Originally Posted by Sportstick

Without revealing how I know this, here's a story you will enjoy. The BMW A/C continued to be ineffective beyond the Bavaria (I had a 1971 2500, essentially a base model, stripped Bavaria), even after the launch of the 5 Series. BMW folks in the U.S. finally insisted that engineers come from Germany to see the problem in person. They acquired a black on black 5 Series and had the team land in Texas, in the summer. They left for a road trip, and without the visiting engineers knowing it, the inside door locks/handles and windows had been deactivated. They roasted.

Soon thereafter, a deal was struck with Delco (division of GM) to supply AC components, and if you find a roughly 1977 vintage 5 Series, you will see the first rotary Delco compressors replacing the prior piston design, with the Delco label clearly showing right on top! Not quite "Bavarian"!!