Target Audience:
Mercedes-Benz W116 450 SEL owners and independent repair shops seeking comprehensive technical information.
Value Proposition:
Provides factory-level repair data, enabling significant cost savings on maintenance and repairs compared to dealership services.
Authenticity:
Original Mercedes-Benz workshop manual used by local service/repair shops.
Completeness:
Complete and intact, with no missing or corrupt parts/pages.
User Friendliness:
Easy-to-follow directions, numbered instructions, and bold figure numbers for quick reference.
Digital Advantage:
Convenience of digital format for easy searching, printing specific sections, and staying clean.
Covered Years:
1973, 1974, 1976, 1977, 1978, 1979, 1980
Covered Models:
All W116 450 SEL models
Covered Engines:
All engine variants for the 450 SEL
Covered Transmissions:
All transmission types for the 450 SEL
Covered Trims:
All trim levels for the 450 SEL
Estimated Page Count:
Hundreds of pages (typical for a comprehensive workshop manual)
Type:
Workshop Repair Service Manual
Engine Service And Repair:
Detailed procedures for engine overhaul, component replacement, tuning, and diagnostics.
Transmission Service And Repair:
Comprehensive coverage of automatic transmission removal, installation, repair, and adjustment.
Brake System:
Maintenance, repair, and diagnostics for hydraulic and pneumatic brake systems, including ABS if applicable to late models.
Electrical System:
Detailed diagnostics and repair procedures for all electrical components, including wiring diagrams.
Suspension:
Service and repair of front and rear suspension systems, including shock absorbers, springs, and control arms.
Steering:
Maintenance and repair of the power steering system, steering column, and steering linkages.
Cooling System:
Radiator, fan, water pump, and thermostat service, including flush and refill procedures.
Fuel Injection Fuel System:
Detailed information on the Bosch K-Jetronic fuel injection system, including fuel pump, injectors, and pressure regulators.
Emission System:
Information on emission control components and troubleshooting.
Heater Air Conditioning:
Service and repair of HVAC systems, including refrigerant handling and component replacement.
Engine Control System:
Diagnostics and repair of the engine management unit and associated sensors.
Chassis Body:
Body repair, panel replacement, and chassis maintenance.
Restraint System:
Information on seatbelts and associated components.
Interior:
Trim removal and installation, upholstery, and interior component service.
Differential Drive Axle:
Service and maintenance of the rear axle and differential.
General Maintenance:
Routine checks, fluid changes, filter replacements, and lubrication.
Troubleshooting:
Systematic diagnosis of common and uncommon problems with step-by-step guides.
Periodic Lubrication:
Detailed lubrication points and schedules.
Disassembly Assembly:
Step-by-step instructions for removing and reassembling vehicle components.
Cleaning Reinstalling:
Procedures for cleaning parts before reassembly and proper installation techniques.
Depth Of Coverage:
Complete professional-level repair and maintenance information, identical to factory service manuals.
Diagnostic Capabilities:
Advanced diagnostic procedures for all major vehicle systems.
Illustrations Diagrams:
Hundreds of detailed illustrations, drawings, photos, and wiring diagrams.
Engine Type:
V8 SOHC (M117)
Displacement:
4.5 Liters (4520 cc)
Horsepower Approx:
230 hp @ 5000 rpm (varies by market and year)
Torque Approx:
380 Nm (280 lb-ft) @ 3000 rpm (varies by market and year)
Fuel Delivery:
Bosch K-Jetronic (CIS) Fuel Injection
Recommended Fuel:
Unleaded Gasoline (Octane rating varies by market, consult manual for specifics)
Coolant Capacity:
Approximately 12.5 Liters (13.2 US Quarts)
Oil Change Interval:
Typically every 10,000-15,000 km (6,000-9,000 miles) or 12 months, refer to specific manual for exact intervals.
Transmission Fluid Change:
Recommended at 40,000-80,000 km (25,000-50,000 miles), depending on driving conditions.
Engine Oil Specification:
Refer to manual for specific API service classification and viscosity grade (e.g., 10W-40, 15W-40, or synthetic equivalents based on climate).
Coolant Specification:
Mercedes-Benz approved antifreeze/coolant concentrate (e.g., G05 or equivalent, mixed with distilled water).
Brake Fluid Specification:
DOT 4 Brake Fluid (typically).
Common Wear Items:
Rubber hoses and bushings prone to aging, vacuum lines for climate control, fuel distributor diaphragm, ignition components.
Potential Problems:
Fuel injection system adjustments, climate control system leaks, window regulator mechanisms, rust on body panels in certain climates.
Manufacturer Legacy:
Mercedes-Benz is renowned for its engineering excellence, luxury, and safety innovations since its inception.
W116 Significance:
The W116 was the first Mercedes-Benz model to be officially designated an 'S-Class' (Sonderklasse - Special Class), setting a new standard for executive sedans.
450 Sel Positioning:
The 450 SEL was the long-wheelbase version, offering enhanced rear passenger space and luxury.
Production Period:
1972-1980
Manufacturing Plant:
Various Mercedes-Benz plants (primarily Sindelfingen, Germany)
