Target Audience:
Professional automotive technicians and experienced DIY owners of Mercedes-Benz W116 450 SE models.
Value Proposition:
Provides factory-level repair and maintenance information to ensure quality service and proper vehicle upkeep, saving on dealership costs.
Emphasis On Safety:
Highlights safety precautions and the importance of using tools like torque wrenches for critical procedures.
Proprietary Component Instructions:
Includes instructions for proprietary components, aiding in understanding their function and performance.
Systems Covered:
Engine, Fuel System, Ignition System, Lubrication System, Exhaust System, Electrical System, Body, Transmission (including removal/installation), Suspension, Steering, Brakes, Climate Control, Interior Trim, Bodywork Repair, Diagnostics and Troubleshooting
Estimated Page Count:
Comprehensive (exact count not specified, but described as a complete service manual)
Type:
Workshop Service Manual / Repair Manual
Engine Mechanics:
Detailed repair and overhaul procedures for the M117 V8 engine.
Fuel System Diagnostics:
Procedures for fuel injection system (Bosch K-Jetronic), fuel pumps, lines, and filters.
Ignition System Service:
Ignition timing, spark plugs, distributor, coil, and related components.
Lubrication System Maintenance:
Oil filter replacement, oil change procedures, oil pressure testing, and pump maintenance.
Exhaust System Repair:
Catalytic converter (if applicable), muffler, exhaust manifold, and pipe repair.
Electrical System Troubleshooting:
Wiring diagrams, component testing, battery, alternator, starter, lighting, and auxiliary systems.
Bodywork And Trim:
Interior and exterior trim removal/installation, body panel repair, and adjustments.
Routine Maintenance:
Tune-ups, fluid changes, filter replacements, lubrication, and general servicing.
Disassembly And Reassembly:
Detailed step-by-step instructions for component and system disassembly and reassembly.
Diagnostic Procedures:
Troubleshooting guides and diagnostic steps for common and uncommon problems.
Component Replacement:
Instructions for replacing wear items and major components.
Special Tool Identification:
References to required or recommended Mercedes-Benz special tools with part numbers.
Depth Of Information:
Covers everything from routine maintenance to complete engine and transmission overhauls, suitable for professional technicians and knowledgeable DIY enthusiasts.
Displacement:
4.5 Liters (4520 cc)
Bore X Stroke:
92.0 mm x 85.0 mm (approx.)
Compression Ratio:
8.0:1 to 9.0:1 (depending on market and year)
Horsepower Output:
Approx. 220-230 bhp @ 5000 rpm (SAE Gross, varies by market)
Torque Output:
Approx. 270-280 lb-ft @ 3000 rpm (SAE Gross, varies by market)
Fuel Delivery:
Bosch K-Jetronic (CIS) Continuous Injection System
Fuel Type:
Premium Unleaded Gasoline
Oil Capacity:
Approx. 8.0 Liters (with filter change)
Recommended Oil Viscosity:
10W-40 or 10W-50 (refer to manual for specific climate recommendations)
Type:
3-speed Automatic (BorgWarner DG-300 or Mercedes-Benz 4G-Tronic variant)
Type:
4-speed Manual (less common, primarily for earlier models or specific markets)
Automatic Transmission Control:
Hydraulic control, often with modes for economy/sport.
Automatic Transmission Fluid:
MB Dexron II (or equivalent specification, refer to manual for exact MB part number)
Automatic Transmission Fluid Capacity:
Approx. 2.0-2.5 Liters (for torque converter and cooler, pan drop refill is less)
Length:
Approx. 5000 mm (196.9 in)
Width:
Approx. 1800 mm (70.9 in)
Height:
Approx. 1450 mm (57.1 in)
Curb Weight:
Approx. 1700-1800 kg (3750-3970 lbs)
Gross Vehicle Weight Rating:
Approx. 2200 kg (4850 lbs)
Crash Safety Era:
Designed to meet safety standards of the 1970s, with significant advancements in passive safety for its time.
Braking System:
Hydraulic disc brakes on all four wheels, often with power assistance and dual-circuit systems.
Suspension Stability:
Independent front suspension (double wishbone) and semi-trailing arm rear suspension for stable handling.
Body Structure:
Reinforced passenger cell and crumple zones designed for occupant protection.
Interior Safety:
Collapsible steering column, padded dashboard, and safety glass.
Audio System:
Original fitment typically featured an AM/FM radio, often with a single cassette player. Aftermarket upgrades are common.
Cruise Control:
Optional or standard depending on trim and market, a significant technological feature for its era.
Vintage Tech:
Focus on mechanical and electrical systems rather than modern digital connectivity; manual covers era-appropriate diagnostics and repairs.
Oil Change Interval:
Typically every 5,000-10,000 km (3,000-6,000 miles) or annually, depending on usage and oil type.
Tune Up Interval:
Spark plugs and ignition points (if applicable) checked/replaced every 15,000-20,000 km (9,000-12,000 miles).
Major Service:
Comprehensive check and fluid changes typically every 30,000-50,000 km (18,000-30,000 miles).
Coolant Type:
Ethylene Glycol based antifreeze/coolant (Mercedes-Benz specification, typically blue or green).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (refer to manual for exact specification).
Common Problems:
Fuel distributor issues, vacuum line leaks affecting idle and performance, cooling system leaks (especially hoses and radiator), wear in suspension bushings and ball joints, door seal degradation, and potential for rust in common W116 areas (e.g., wheel arches, battery tray).
Mercedes Benz Legacy:
Reputation for engineering excellence, durability, and luxury, dating back to the late 19th century.
W116 Introduction:
Introduced in 1972 as the successor to the W108/W109 series, it was the first Mercedes-Benz model to be officially designated as the 'S-Class'.
W116 Design Philosophy:
Emphasized safety, comfort, and advanced engineering, setting new benchmarks for luxury sedans.
Production Years:
1972-1980
Production Variants:
Available in 280 S, 280 SE, 350 SE, 450 SE, 450 SEL, 450 SEL 6.9, and later 300 SD (turbo diesel).
