🏷️ Basic Information Identification Make: Mercedes-Benz Model: SL-Class Chassis Code: R107 / C107 Year: 1977 Codes Manual Product Name: 1977 Mercedes R107 & C107 SL-Class Service and Repair Manual 👋 Introduction Market Position Target Audience: Mercedes-Benz R107/C107 SL-Class owners, independent repair shops, and automotive enthusiasts seeking authentic factory repair information. Competitive Analysis Advantage: Provides precise, dealer-level information essential for maintaining and repairing these classic vehicles, superior to generic repair guides. Key Features Authenticity: This is the exact same manual used by factory-trained technicians. Comprehensiveness: Covers all models and all repairs from A-Z with step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications. Digital Convenience: Single PDF file for easy navigation, printing of specific sections, and storage, avoiding physical wear and tear. 📋 Manual Details Coverage Areas Primary Coverage: All models of R107 and C107 SL-Class for the 1977 model year. Repair Scope: A-Z (Comprehensive repairs). Page Count Estimated Page Count: Information not explicitly stated, but implied to be a comprehensive factory manual. Manual Type Type: Service and Repair Manual. Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine, Fuel System, Lubrication, Cooling, Intake/Exhaust, Ignition, Starting, Charging, Automatic Transmission, Manual Transmission, Clutch, Transfer Case (if applicable), Drive Shaft, Differential, Axles. Chassis & Suspension: Suspension Systems (front and rear), Steering System (including power steering), Wheel Alignment Specifications, Tire and Wheel Service. Braking System: Hydraulic Brake Control, Brake System Components, Parking Brake System. Electrical System: Complete Wiring Schematics, Lighting, Gauges, Instruments, Meters, Audio/Visual Systems, Horn, Windshield Wipers and Washers, Door Locks, Power Windows (if equipped), Cruise Control, Seat Belts, Supplemental Restraint Systems (if applicable, though unlikely for 1977 models), Engine Immobilizer (if applicable). Body & Interior: Body Panels, Doors, Hood, Glass, Mirrors, Interior Trim, Seats, Air Conditioning System. Emission Control: Emission Control Systems and Specifications. Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, inspections. Diagnostics: Troubleshooting guides, symptom-based diagnosis, fault code interpretation (if applicable to the era). Repair: Step-by-step repair instructions for all covered systems, component removal and installation. Adjustment: Precise adjustment procedures for engine, brakes, suspension, and other components. Specifications: Torque values, clearances, fluid types and capacities, electrical specifications. Technical Depth Depth: Factory-level detail, suitable for dealership technicians; comprehensive for DIY enthusiasts with mechanical aptitude. Accuracy: Vehicle-specific, not generic information, providing exact procedures and data. 📊 Manual Specifications File Format Format: PDF Compatibility: Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac. Requirements: Adobe PDF Reader, Winzip (free online). Print Quality Printability: Fully printable, allowing users to print specific pages or diagrams as needed. Scalability: Images and diagrams can be enlarged for detailed viewing and printing. Binding Type Binding: N/A (Digital format provides flexibility; no physical binding). Paper Type Paper Type: N/A (Digital format; users print on their preferred paper type). ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6 Cylinder (e.g., M110) and V8 (e.g., M117) overhead camshaft engines. Displacement Range: Likely 2.8L, 3.5L, 3.8L, 4.5L, 5.0L depending on specific model variant within the 1977 lineup. (e.g., 280SL, 350SL, 450SL). Performance Horsepower Range: Varies by engine, typically ranging from approximately 145-200+ hp for 1977 models. Torque Range: Varies by engine, substantial torque figures characteristic of Mercedes-Benz engines of this era. Fuel System Fuel Delivery: Bosch mechanical fuel injection (CIS - Continuous Injection System) for most gasoline engines, potentially carburetors on some earlier or specific market variants. Lubrication Oil Type: Specific viscosity grades (e.g., SAE 10W-40, 20W-50) based on ambient temperature, often a premium quality oil recommended. Oil Capacity: Detailed in the manual, typically around 5-8 quarts (4.7-7.5 liters) including filter. Cooling System Coolant Type: Ethylene glycol based antifreeze mixed with distilled water. Emission Control Systems: Likely includes features such as catalytic converters (depending on market), EGR, and air injection systems. 🔧 Transmission Standard Type: 4-speed Automatic Transmission (e.g., 4G-Tronic) was widely standard, especially on larger displacement models. Optional Type: Manual Transmission (e.g., 4-speed or 5-speed) may have been available on specific models or markets. Features Transmission Fluid: Specific ATF (Automatic Transmission Fluid) type, typically Dexron II or equivalent. Fluid Capacity: Detailed in manual, including torque converter fill. 📐 Dimensions Exterior Body Style: Two-door convertible with a removable hardtop (SL designation for Sport Leicht, often referred to as a Roadster with a Landaulet-style hardtop). Wheelbase: Approximately 2,400 mm (94.5 inches). Length: Approximately 4,500 - 4,700 mm (177.2 - 185.0 inches) depending on specific model/bumper configurations. Weights Curb Weight: Approximately 1,500 - 1,700 kg (3,300 - 3,750 lbs) depending on engine and equipment. Gross Vehicle Weight: Specified in manual, typically around 1,900 - 2,100 kg. 🛡️ Safety Features Ratings Crash Testing: Early safety standards; detailed official crash test ratings from this era are less common or standardized as today. Active Features Braking: Four-wheel disc brakes were standard on most models by this era, a significant safety feature. Steering: Power steering assisted steering for improved control. Passive Features Restraints:...