This comprehensive service and repair manual is specifically designed for the BMW 7-series E23 model year 1985, covering all models and repairs in detail. It provides the same information used by technicians at authorized dealerships for maintaining, servicing, diagnosing, and repairing your vehicle. The manual includes complete step-by-step instructions, accompanied by clear diagrams, illustrations, wiring schematics, and specifications to ensure ease of understanding and successful repairs. You'll find a wealth of information covering all aspects of your vehicle, from basic maintenance to advanced diagnostics. Key sections include: * **Maintenance:** Routine maintenance procedures like oil changes, filter replacements, and fluid checks. * **Engine:** Detailed information on engine components, operation, troubleshooting, and repair. * **Control System:** Coverage of electronic control systems, sensors, actuators, and diagnostics. * **Mechanical:** Comprehensive explanations of mechanical components like transmission, suspension, brakes, and steering. * **Fuel Service Specifications:** Specifications for fuel systems, injectors, and fuel lines. * **Emission Control:** Information on emissions systems, components, and troubleshooting. * **Intake Exhaust Cooling:** Detailed information on intake and exhaust systems, including cooling systems. * **Lube:** Specifications for lubricants and fluids used in your vehicle. * **Ignition Starting Charging:** Coverage of ignition systems, starting systems, and charging systems. * **Auto Transmission Clutch:** Detailed information on automatic transmissions, clutches, and related components. * **Manual Transmission:** Detailed information on manual transmissions and related components. * **Transfer Propeller Shaft:** Information on transfer cases, propeller shafts, and related components. * **Drive Shaft:** Information on drive shafts and related components. * **Differential:** Detailed information on differentials and related components. * **Axle Suspension:** Information on axles, suspension systems, and components. * **Tire & Wheel:** Information on tires, wheels, and related components. * **Brake Control:** Information on brake control systems, components, and troubleshooting. * **Brake:** Detailed information on brake systems, components, and repair. * **Parking Brake:** Information on parking brake systems and components. * **Steering Column:** Information on steering columns and components. * **Power Steering:** Detailed information on power steering systems and components. * **Air Condition:** Information on air conditioning systems, components, and troubleshooting. * **Suppl Restraint System:** Information on supplemental restraint systems (airbags) and components. * **Seat Belt:** Information on seat belt systems and components. * **Engine Immobilizer:** Information on engine immobilizer systems and components. * **Cruise Control:** Information on cruise control systems and components. * **Wiper & Washer:** Information on wiper and washer systems and components. * **Door Lock:** Information on door lock systems and components. * **Meter Audio/Visual:** Information on instrument clusters, audio systems, and visual displays. * **Horn:** Information on horn systems and components. * **Windshield/Glass Mirror:** Information on windshield, glass, and mirror systems and components. * **Instrument Panel:** Information on instrument panels and components. * **Seat:** Information on seats and related components. * **Engine Hood/ Door:** Information on engine hood and door systems and components. * **Exterior & Interior:** Information on exterior and interior components, including trim, upholstery, and lighting. * **Electrical:** Comprehensive coverage of electrical systems, wiring diagrams, and troubleshooting. * **Multiplex/ Can Communication:** Information on multiplex and CAN communication systems. You can save time and money by using this manual to perform repairs yourself, gaining a better understanding of your vehicle and becoming more confident in tackling automotive tasks.

The BMW 7-Series E23, produced from 1977 to 1986, marked a significant step forward for the German automaker. This generation of the luxury sedan, known affectionately as the "shark nose" for its distinctive grille design, was the first to feature a fully independent suspension and a powerful V8 engine as standard. The E23 aimed to rival Mercedes-Benz's S-Class in both comfort and performance, and it succeeded in many ways. It offered a spacious and luxurious interior with plush leather seating, wood trim, and advanced features for the time, like an optional digital instrument cluster. Under the hood, the engine options ranged from a potent 3.0-liter M30 inline-six to a powerful 3.5-liter V8, providing plenty of power for both leisurely cruising and spirited driving. The BMW 7-Series E23 was a substantial car in its time, offering a blend of opulent comfort and impressive performance. It was the first 7-Series to feature a fully independent suspension, which translated to superior handling and ride quality compared to its predecessor. Its advanced features, including the optional digital instrument cluster, power windows, and air conditioning, were a testament to its luxury status. However, it wasn't just about comfort. The E23 was equipped with powerful engines, most notably the 3.5-liter V8, which provided ample power for its size. This combination of comfort, performance, and innovative technology solidified the 7-Series E23 as a true luxury car and a formidable competitor in its segment. It also laid the groundwork for the future generations of the 7-Series, which would continue to refine the brand's reputation for luxurious performance.