Technical data
📄 Head unit, audio/navigation (635)
📄 Antenna, mobile telephone/GPS
📄 Antenna, GPS (cars with OnStar)
📄 Amplifier, Premium
📄 Amplifier, Prestige
📄 Test readings, amplifier connections
📄 Speakers, Premium
📄 Speaker, Prestige (4D)
📄 Speaker, Prestige (5D)
📄 Steering wheel controls (switches)
📄 Steering wheel control (switches), Sentronic
📄 CD changer
📄 Test values, CD changer connections