Target Audience:
Mercedes-Benz W116 450SEL owners, independent repair shops, DIY enthusiasts seeking to maintain or repair their classic luxury sedan.
Value Proposition:
Provides significant cost savings for owners by enabling self-performed maintenance and repairs, offering access to professional-level repair data.
Ease Of Use:
Easy-to-follow step-by-step instructions with clear illustrations and diagrams for simplified repair processes.
Delivery:
Instant email delivery upon payment confirmation.
Guarantee:
Customer Satisfaction Guaranteed
Years Covered:
1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980
Specific Models Covered:
450SEL
Global Coverage:
All Models/Engines/Trim/Transmissions Types Are Covered
Estimated Page Count:
N/A (Digital Download)
Type:
Complete Workshop Service Repair Manual
Engine:
Complete engine overhaul, tuning, fuel injection system (Bosch K-Jetronic), ignition system, cooling system, lubrication system.
Transmission:
Automatic transmission (e.g., 3-speed 3HP20 or 4-speed 4HP22, depending on exact year/spec), service, repair, and overhaul.
Brakes:
Hydraulic system, disc brake systems (front and rear), parking brake, fluid specifications, bleeding procedures.
Suspension And Steering:
Front and rear suspension components, shock absorbers, springs, steering box, power steering system, alignment specifications.
Electrical System:
Wiring diagrams, charging system (alternator, starter), lighting system, instrumentation, accessories, battery, fuses, relays.
Fuel System:
Fuel tank, fuel pump, fuel lines, fuel filter, fuel distributor, injectors, emissions control systems.
Bodywork And Interior:
Body panel repair, door mechanisms, window regulators, seat adjustments, climate control system (HVAC), sound deadening.
Chassis And Frame:
Frame construction, body mounting, rust prevention, underbody coatings.
Maintenance:
Scheduled maintenance tasks, oil changes, filter replacements, fluid checks and top-offs, lubrication points.
Troubleshooting:
Diagnostic procedures for common problems, symptom analysis, fault finding charts.
Repair:
Step-by-step instructions for component removal, repair, and reinstallation for all major systems.
Rebuilds:
Complete engine and transmission overhaul procedures with detailed component specifications and tolerances.
Bodywork:
Body panel alignment and repair
Electrical Diagnostics:
Component testing, circuit tracing, wiring harness repair.
Climate Control Service:
Refrigerant system service, heater core replacement, fan motor repair.
Depth:
Comprehensive, from basic maintenance to full engine and transmission rebuilds, including detailed diagnostic procedures.
Format:
PDF (Portable Document Format)
Compatibility:
Compatible with all PC & MAC Computers, tablets, and smartphones with Adobe Reader installed.
Printability:
Printable by page, chapter, or entire manual.
Binding Type:
N/A (Digital Download)
Paper Type:
N/A (Digital Download)
Required Software:
Adobe Reader (free download available)
Displacement:
4.5 Liters (4520 cc)
Bore X Stroke:
92.0 mm x 85.0 mm
Horsepower Gross Approx:
197 hp @ 4750 rpm (SAE gross for early models)
Torque Gross Approx:
268 lb-ft @ 3000 rpm (SAE gross for early models)
Fuel Delivery:
Bosch K-Jetronic Continuous Fuel Injection (CIS)
Fuel Type:
Unleaded gasoline
Ignition Type:
Breakerless electronic ignition
Cooling Type:
Water-cooled
Oil Capacity With Filter:
Approx. 8.0 Liters (8.5 US Quarts)
Transmission Type:
3-speed Automatic (e.g., 3HP20) or 4-speed Automatic (e.g., 4HP22) depending on market and model year.
Optional Transmission:
Manual transmission was not typically offered on the 450SEL.
Transmission Fluid Type:
Refer to manual for specific MB specifications (e.g., Dexron II compatible fluids).
Gear Ratios:
Detailed gear ratios provided within the manual for accurate diagnostics and repair.
Safety Standards:
Designed to meet contemporary safety standards of the 1970s and 1980s.
Brakes:
Four-wheel disc brakes with front ventilated discs.
Steering:
Recirculating ball steering with power assist.
Restraints:
Seat belts (inertia reel front belts typically standard), crumple zones.
Body Structure:
Reinforced safety cage, energy-absorbing steering column.
Oil Change Interval:
Typically every 10,000-15,000 km (6,000-9,000 miles) or annually, depending on driving conditions and oil used (refer to manual for specific recommendations).
Filter Replacement:
Engine oil filter, fuel filter, and air filter to be replaced at specified intervals, detailed in the manual.
Engine Oil Type:
Refer to manual for viscosity grades (e.g., 20W-50, 10W-40) and API service classifications.
Coolant Type:
Ethylene glycol based antifreeze/coolant, typically a 50/50 mix with distilled water.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (check manual for exact specification).
Common Problems:
Fuel system leaks (especially with early rubber fuel lines), aging rubber and plastic components (hoses, seals), climate control system issues, occasional electrical gremlins.
Maintenance Focus:
Regular preventative maintenance, especially fluid flushes and replacement of wear items, is crucial for longevity.
Manufacturer Philosophy:
Mercedes-Benz is renowned for engineering excellence, durability, and pioneering automotive safety and luxury features.
W116 Introduction:
The W116 was the first Mercedes-Benz S-Class generation, launched in 1972, representing a significant leap in executive luxury and engineering for its time.
450Sel Positioning:
The 450SEL represented the long-wheelbase variant, offering increased rear passenger space and a focus on supreme comfort and prestige.
Production Years:
W116 production: 1972-1980.
Production Locations:
Primarily manufactured in Germany.
Industry Impact:
The W116 generation is widely recognized as a benchmark for luxury sedans of its era, setting standards for comfort, safety, and build quality that influenced future automotive design.
Automotive Journalism:
Frequently praised by automotive critics for its refined ride, quiet cabin, and robust engineering. Often considered a 'driver's car' in the luxury segment.
Class Status:
Considered a 'Youngtimer' classic and highly sought after by collectors and enthusiasts.
