I have a 1989 bmw 525i that needed an AC service. I check with other BMW repair services that could not service the AC because of the age of the vehicle. I took my car to German motor work for repair. They had the knowledge, tools and parts to service my AC. I can honestly say that now my AC is working perfect. It blows very cold on low. They are truly subject matter experts for the BMW vehicles no matter what year, make and model.