Target Audience:
DIY enthusiasts and professional mechanics seeking detailed repair information for Mercedes-Benz W114/W115 models.
Value Proposition:
Offers significant cost savings by enabling owners to perform their own maintenance and repairs, avoiding high labor costs.
Ease Of Use:
Designed for easy use with step-by-step instructions and visual aids, accessible on various devices.
Delivery:
Instant download upon payment, no shipping costs or delays.
Powertrain:
Engine overhaul, fuel system, ignition system, exhaust system, cooling system, lubrication system.
Drivetrain:
Clutch, transmission (manual and automatic where applicable), driveshafts, differential, axles.
Chassis And Suspension:
Front suspension, rear suspension, steering system, wheel alignment, shock absorbers, springs.
Brakes:
Brake system diagnosis, hydraulic system, calipers, rotors, pads, parking brake.
Electrical:
Battery, starting system, charging system, lighting system, instrumentation, wiring diagrams.
Bodywork And Interior:
Body repair, door mechanisms, glass, upholstery, trim, heating and ventilation.
Maintenance:
Routine maintenance, fluid changes, filter replacements, lubrication, inspections.
Repair:
Step-by-step repair procedures for all major components and systems.
Diagnostics:
Troubleshooting guides and diagnostic procedures for common and uncommon issues.
Overhaul:
Detailed instructions for complete engine and transmission overhauls.
Adjustments:
Carburetor adjustments, timing adjustments, brake adjustments, clutch adjustments.
Depth:
Full professional quality in-depth service and repair. Covers everything from routine maintenance to complete rebuilds.
Diagrams:
Includes detailed wiring diagrams for all electrical systems.
Illustrations:
Features step-by-step instructions with pictures to aid understanding.
Searchability:
Likely searchable text within PDF, enhancing usability.
Quality:
Professional quality digital download, implying clear text and images.
Binding:
N/A (Digital Download)
Paper:
N/A (Digital Download)
Operating Systems:
Compatible with all PCs, MACs, Tablets, and Smartphones (Win/MAC/Linux).
Engine Family:
Mercedes-Benz M114/M115 inline-six gasoline engines
Displacement 280:
2.8 Liters (2778 cc)
Bore X Stroke 280:
82.0 mm x 90.0 mm (approximate)
Compression Ratio 280:
8.0:1 to 8.7:1 (depending on variant)
Horsepower 280:
130-140 hp @ 5000 rpm (approximate, depending on market and variant)
Torque 280:
220-235 Nm @ 3000 rpm (approximate, depending on market and variant)
Carburetion:
Typically downdraft twin-choke carburetors (e.g., Solex, Zenith Stromberg) or Bosch fuel injection on some variants.
Fuel Type:
Unleaded gasoline (or leaded with appropriate precautions for earlier models).
Block Material:
Cast Iron
Cylinder Head Material:
Aluminum Alloy
Valvetrain:
Single Overhead Camshaft (SOHC)
Transmission Type:
4-speed manual or 4-speed automatic transmission (e.g., Mercedes-Benz '4G-Tronic'/'722.1' series).
Optional Transmission:
Automatic transmission was a popular option.
Clutch Type:
Single dry plate (manual transmission).
Transmission Fluid Spec:
Refer to manual for specific ATF (Automatic Transmission Fluid) type (e.g., Dexron II or equivalent).
Body Styles:
4-door Sedan (W115 chassis), 2-door Coupe (W114 chassis).
Wheelbase:
2750 mm (108.3 in)
Length:
Approx. 4750 mm (187 in)
Width:
Approx. 1750 mm (68.9 in)
Height:
Approx. 1450 mm (57.1 in)
Curb Weight:
Approx. 1400-1550 kg (3086-3417 lbs) depending on body style and equipment.
Crash Safety:
Designed to early safety standards of the 1970s; no modern crash test ratings apply. Emphasis on sturdy chassis construction.
Braking System:
Front disc brakes, rear drum brakes. Power assisted braking standard.
Steering:
Recirculating ball steering, power steering available as an option.
Seatbelts:
Standard front seat belts, rear seat belts often standard or optional depending on market.
Body Construction:
Unitized body construction with crumple zones designed for the era.
Oil Change Interval:
Typically 5,000-7,500 miles (8,000-12,000 km) or annually, whichever comes first. Refer to manual for precise intervals.
Tune Up Interval:
Recommended tune-ups (spark plugs, points, filters) every 10,000-20,000 miles (16,000-32,000 km).
Transmission Service:
Fluid and filter change recommended every 30,000-50,000 miles (48,000-80,000 km).
Engine Oil Type:
SAE 20W-50 or SAE 10W-40 (API SE/SF service classification recommended). Check manual for specific viscosity based on climate.
Coolant Type:
Ethylene glycol-based coolant (50/50 mix with distilled water).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Common Problems:
Carburetor issues (tuning, leaks), fuel system degradation (old hoses), cooling system leaks (radiator, hoses), vacuum line deterioration, aging electrical components, rust on body panels, wear in suspension bushings.
Specific Issues 280:
Potential for camshaft wear, timing chain stretch, and carburetor maladjustment leading to poor performance or fuel economy.
Manufacturer:
Mercedes-Benz AG
Introduction Era:
The W114/W115 series, introduced in 1968, represented Mercedes-Benz's move towards more modern styling and engineering, replacing the W108/W109 (S-Class) and W110 (Fintail) ranges. The 280 models represented the higher-end of the W114/W115 lineup.
Facelift:
The 1973 model year saw a significant facelift for both the W114 and W115 series, including revised front-end styling, larger bumpers, and updated interior features, aligning with the covered years.
Production Period:
1968-1976 (W114/W115 series)
Key Markets:
Europe, North America, and global markets.
Design Award:
The W114/W115 series, often referred to as the 'Stroke Eight' or 'New Generation' sedans, were recognized for their elegant and timeless design by Paul Bracq.
Market Reception:
Highly successful in establishing Mercedes-Benz's reputation for quality, durability, and refinement in the mid-size luxury segment.
