🏷️ Basic Information Identification Make: Mercedes-Benz Model: W116 280 S Year: 1975, 1976 Codes Chassis Code: W116 Generation Generation: First Generation (W116) 👋 Introduction Market Position Target Audience: Mechanical technicians, Mercedes-Benz enthusiasts, owners performing their own maintenance and repairs. Key Features Special Emphasis: Highlights specific product aspects, special tools, and safety precautions (WARNING, CAUTION, NOTE). Value Proposition: Enables owners to be better informed and perform repairs knowledgeably, saving on dealer costs and maintaining vehicle quality. Content Origin: Reflects information available in authorized Mercedes-Benz dealer service departments at the time of publication. 📋 Manual Details Coverage Areas Covered Models: Mercedes-Benz W116 280 S Covered Years: 1975, 1976 Page Count Estimated Page Count: Varies by specific edition, but comprehensive workshop manuals for this era typically range from 500-1500 pages. Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Engine mechanical, fuel system, ignition system, cooling system, lubrication system, exhaust system. Transmission: Manual and automatic transmission overhaul, removal, and installation. Drivetrain: Driveshafts, differentials, axles. Suspension: Front and rear suspension components, steering system. Brakes: Brake system hydraulics, disc and drum brake overhaul, parking brake. Electrical: Wiring diagrams, starter, alternator, battery, lighting, instrumentation, ignition switch, power windows, central locking (if equipped). Bodywork: Body panel removal and installation, doors, windows, bumpers, interior trim, body sealant and rustproofing. HVAC: Heating, ventilation, and air conditioning system (if equipped). Procedures Included Maintenance: Routine service, lubrication, fluid changes, filter replacements, tune-ups. Troubleshooting: Diagnostic procedures for common faults and symptoms. Repair: Detailed repair and overhaul instructions for all major components. Installation: Component removal and installation procedures. Assembly: Component assembly and disassembly instructions. Technical Depth Depth: Comprehensive, covering from basic maintenance to complete engine and transmission rebuilds, intended for professional technicians but accessible to experienced DIY enthusiasts. 📊 Manual Specifications File Format Format: PDF Searchability: Likely text-searchable, allowing for quick location of specific topics. Print Quality Printability: Yes, printable for hard copy reference. Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, SOHC (Single Overhead Camshaft) Engine Code: M110 (typically) Displacement: 2.8 Liters (2778 cc) Performance Horsepower: Approximately 136-142 hp (DIN) depending on specific market and emission controls. Torque: Approximately 230-235 Nm (170-174 lb-ft) at around 3000-3500 rpm. Fuel System Fuel Delivery: Bosch D-Jetronic Fuel Injection (or Weber carburetors on some earlier or specific market models, though D-Jetronic is more common for this period and model designation). Fuel Type: Unleaded gasoline (91 AKI or higher recommended, lead substitute may be required for earlier engines not designed for unleaded fuel). Lubrication Oil Type: API SG or higher, SAE 10W-40 or 10W-50 recommended, consult specific manual for precise OEM specification (e.g., MB 229.1). Cooling Coolant Type: Ethylene glycol-based coolant with corrosion inhibitors, typically a 50/50 mix with distilled water. 🔧 Transmission Standard Transmission Type: 4-speed manual transmission (typically). Optional Transmission Type: 3-speed automatic transmission (optional, typically a "3G-Tronic" or 722.1 variant). Features Automatic Features: Torque converter, hydraulic control unit. Fluid Specifications Automatic Transmission Fluid: MB 236.2 (Dexron II or equivalent). 📐 Dimensions Exterior Length: Approximately 4,960 mm (195.3 in) Width: Approximately 1,790 mm (70.5 in) Height: Approximately 1,420 mm (55.9 in) Weights Curb Weight: Approximately 1,600 - 1,700 kg (3,527 - 3,748 lbs) Gross Vehicle Weight: Approximately 2,150 kg (4,740 lbs) 🛡️ Safety Features Ratings Crash Test Ratings: As this vehicle predates modern standardized crash testing (e.g., NHTSA), specific ratings are not directly applicable. However, the W116 was designed with advanced safety features for its era, including a strong safety cell and impact-absorbing zones. Active Features Brakes: Four-wheel disc brakes (solid front, solid or ventilated rear depending on spec), often with power assistance. Passive Features Steering Column: Collapsible steering column. Interior: Impact-absorbing dashboard and trim, padded surfaces, seatbelts (often lap and shoulder belts in the front). 💡 Technology Features Infotainment Audio System: Factory-fitted AM/FM radio, often with a cassette player. High-end systems might have integrated amplifiers. Driver Assistance Cruise Control: Optional cruise control system available on some models. Air Conditioning: Effective climate control system, often with automatic temperature regulation (Thermatic) on higher trims. Connectivity Connectivity Features: Limited by modern standards; primarily focused on vehicle operation and comfort features. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-10,000 km (3,000-6,000 miles) or 6-12 months, depending on driving conditions and oil used. Consult the manual for precise intervals. Tune Up Interval: Spark plugs, ignition points (if applicable), and fuel system checks usually recommended every 15,000-30,000 km (9,000-18,000 miles). Transmission Fluid Change: Automatic transmission fluid and filter typically every 40,000-80,000 km (25,000-50,000 miles). Fluid Specifications Engine Oil Capacity: Approximately 6.5 - 7.5 liters (6.9 - 7.9 US quarts) with filter, depending on engine variant. Consult the manual for the exact capacity for the M110 engine. Coolant Capacity: Approximately 10-12 liters...