Target Audience:
Mercedes-Benz W116 300 SD owners (DIY enthusiasts), independent repair shops, professional mechanics
Unique Selling Proposition:
Vehicle-specific, factory-level repair information, including diagrams, schematics, and step-by-step procedures, comparable to dealer service manuals.
Key Features:
Detailed illustrations, wiring schematics, diagnostic flowcharts, part specifications, torque values, comprehensive troubleshooting.
Systems Covered:
General Information, Engine Mechanical, Engine Electrical, Emission Control, Fuel System, Clutch System, Manual Transaxle, Automatic Transaxle, Driveshaft & Axle, Suspension System, Steering System, Restraint System, Brake System, Body (Interior & Exterior), Body Electrical System, HVAC
Page Count:
Not Specified (Comprehensive)
Manual Type:
Service Repair Workshop Manual
Digital Delivery:
Speed Download
Usability Enhancement:
Ability to print individual pages for use in the workshop, preventing damage to the original manual.
Engine Mechanical:
Cylinder head, block, pistons, crankshaft, camshaft, timing, lubrication, cooling
Engine Electrical:
Ignition system, starter, alternator, battery, wiring diagrams
Fuel System:
Diesel injection pump (Bosch), injectors, fuel lines, filters, glow plug system
Transmission:
Manual and automatic transmission overhaul, clutch service, driveshaft and axle repair
Suspension And Steering:
Front and rear suspension components, steering gear, power steering system
Brakes:
Hydraulic system, disc brakes, parking brake, ABS (if equipped)
Body And Interior:
Body panel removal/installation, interior trim, seats, doors, windows
Body Electrical:
Lighting, instrumentation, power accessories, central locking, wiring schematics
HVAC:
Heating, ventilation, and air conditioning system diagnosis and repair
Emission Control:
Catalytic converter system (if equipped for certain markets), EGR valve (if equipped), emission control vacuum circuits.
Driveshaft And Axle:
U-joints, CV joints (if applicable), differential maintenance, axle shaft replacement.
Restraint:
Seat belt inspection and replacement, airbag systems (if applicable to specific market/late models, though unlikely for 1978-1980).
Procedures Included:
Step-by-step repair instructions, troubleshooting guides, diagnostic procedures, routine maintenance, component replacement, overhaul procedures, wiring schematic interpretation
Diagnostic Procedures:
Includes procedures for diagnosing engine performance, electrical faults, and mechanical issues using visual inspection, measurement, and component testing.
Technical Depth:
Comprehensive (from basic maintenance to complete engine and transmission rebuilds)
Print Quality:
Printable individual pages (Adobe PDF Reader required)
Binding Type:
Digital (No physical binding)
Paper Type:
N/A (Digital Format)
Compatibility:
All Versions of Windows and Mac
Searchable Text:
Likely searchable (common in PDF manuals, highly beneficial for quick lookups)
Engine Type:
Inline 5-Cylinder Turbocharged Diesel
Displacement:
2998 cc (3.0 Liters)
Bore X Stroke:
87.0 mm x 84.0 mm
Compression Ratio:
21.0:1 (typical for OM617)
Horsepower:
115-125 hp @ 4350-4500 rpm (approximate, depending on specific tune)
Torque:
170-185 lb-ft @ 2400 rpm (approximate, depending on specific tune)
Injection System:
Bosch Inline Injection Pump (Plunger type)
Glow Plug System:
Pre-glow and post-glow system for cold starts
Safety Standard:
Reflects 1970s safety standards; features include crumple zones, robust body structure.
Passive Safety:
Safety glass, padded dashboard, energy-absorbing steering column, reinforced A-pillars.
Seatbelts:
Front and rear seat belts (lap and shoulder belts in front, likely lap belts in rear depending on configuration).
Infotainment Features:
Basic AM/FM radio with cassette player, analog gauges, mechanical climate control.
Driver Assistance Features:
Power steering, cruise control (optional), limited driver assistance compared to modern vehicles.
Connectivity Features:
N/A (No modern connectivity options like Bluetooth or USB).
Central Locking System:
Vacuum-operated central locking system, common issue with hoses and actuators.
Oil Change Interval:
Typically every 5,000-7,500 miles or 6-12 months, with a filter change at each interval.
Fuel Filter Interval:
Recommended every 10,000-15,000 miles or annually, especially important for diesel engines.
Air Filter Interval:
Typically every 15,000-30,000 miles, or more frequently in dusty conditions.
Engine Oil Type:
Diesel engine oil, e.g., API CD or later, with appropriate viscosity for climate (e.g., 15W-40, 10W-30).
Coolant Type:
Ethylene glycol-based antifreeze (e.g., MB Spec 325.0 or equivalent).
Transmission Fluid Automatic:
Dexron II or III equivalent.
Power Steering Fluid:
MB Power Steering Fluid or equivalent hydraulic fluid.
Common Issues:
Rusted fuel lines, vacuum leak issues (affecting central locking, HVAC, engine idle), worn engine mounts, injector pump seal leaks, potential for injector pump timing issues, climate control system failures.
Diesel Specific Issues:
Glow plug issues, injector wear, fuel injection pump maintenance, potential for air in fuel lines.
Brand Heritage:
Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and durability, particularly with its diesel engines.
W116 Generation:
The W116 was the first generation of Mercedes-Benz's S-Class (Sonderklasse - Special Class) luxury sedans, produced from 1972 to 1980. It represented a significant advancement in comfort, safety, and technology for its time.
W116 300Sd Introduction:
The 300 SD was introduced in 1978, featuring the OM617 turbocharged diesel engine. It was one of the first turbocharged diesel passenger cars offered by Mercedes-Benz in the US market, providing a balance of fuel economy and performance.
Production Period:
W116 production: 1972-1980; W116 300 SD production: 1978-1980
