Mercedes Benz W114 280 1972-1976 Service Repair Manual

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UGS: 157642

Mots clés: 1972 1973 1974 1975 1976 280 Car Cars Featured Mercedes Mercedes-benz W114

Variantes de produits

Description

Welcome to the comprehensive service and repair manual for the W114 280 Sedan, covering models produced from 1972 through 1976. This vehicle, part of the distinguished 'Stroke Eight' series, represents a commitment to engineering excellence, offering a refined driving experience powered by its robust inline-6 cylinder, SOHC 2.8-liter engine. Known for its solid construction, comfortable ride, and reliable performance, the W114 280 was a significant model in history, blending modern design with enduring quality. This manual provides detailed information to ensure the optimal maintenance and longevity of your classic. This workshop service repair manual offers extensive coverage for all aspects of the W114 280, including its 280 engine variants and both automatic and manual transmissions. Within its hundreds of pages, you will find detailed procedures for engine overhaul, transmission service, brake system maintenance, electrical system diagnostics, suspension and steering adjustments, cooling and fuel systems, and much more. The manual includes step-by-step instructions, diagnostic guidance, and hundreds of illustrations to assist owners, mechanics, and technicians in performing all necessary maintenance and repair tasks with precision and confidence.

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

W114 280

Body Style:

Sedan (W114 chassis)

Production Years Covered:

1972, 1973, 1974, 1975, 1976

Chassis Code:

👋 Introduction

Market Position

Target Audience:

Owners of Mercedes-Benz W114 280, classic car enthusiasts, independent mechanics, restoration specialists.

Competitive Analysis

Value Proposition:

Provides essential factory-level technical data for maintaining and repairing a vintage Mercedes-Benz, saving significant costs compared to dealership service.

Key Features

Print Flexibility:

Ability to print the entire manual or specific sections as needed for convenient access in a workshop environment.

Searchability:

Digital PDF format allows for quick text searching of specific terms, procedures, or component names.

📋 Manual Details

Coverage Areas

Primary Coverage:

Mercedes-Benz W114 280 (1972-1976 models)

Engine Variants Covered:

280 engine variants

Transmission Variants Covered:

Automatic and Manual transmissions

Page Count

Estimated Page Count:

Hundreds of pages

Manual Type

Type:

Workshop Service Repair Manual

Language

Language:

English

Format

File Format:

PDF Download

📖 Manual Coverage

Systems Covered

Engine Service Repair:

Complete overhaul, diagnostics, component testing, timing, seals, gaskets.

Transmission Service Repair:

Automatic and manual transmission service, overhaul, clutch, gears, linkages.

Brake System:

Disc and drum brake servicing, hydraulic system, components, bleeding, parking brake.

Electrical System:

Comprehensive coverage including starter, alternator, battery, lighting, ignition, instrumentation, and wiring.

Wiring Diagrams:

Detailed, system-specific wiring diagrams for all electrical components.

Suspension:

Front and rear suspension components, springs, shock absorbers, bushings, alignment.

Steering:

Steering gear, linkage, power steering system (if equipped), column, wheel alignment.

Cooling System:

Radiator, water pump, thermostat, hoses, fan, coolant specifications.

Fuel Injection System:

Bosch mechanical fuel injection system diagnosis, testing, and adjustment.

Fuel System:

Fuel pump, fuel lines, fuel tank, filters, carburetor (if applicable to specific variants).

Emission System:

Emission control systems, smog pump, EGR, PCV components and servicing.

Heating Air Conditioning:

HVAC system operation, components, refrigerant, airflow, control mechanisms.

Engine Control System:

Ignition timing, idle speed control, basic engine management principles.

Chassis Body:

Body panel repair, structural components, doors, hood, trunk, glass, weatherstripping.

Restraint System:

Seat belts, mounting points, and related safety components.

Interior:

Dashboard, seats, upholstery, trim panels, headliner, carpet.

Differential Drive:

Rear axle assembly, differential unit, lubrication, bearings.

Axle:

Front and rear axle components, bearings, seals.

General Maintenance:

Routine checks, fluid changes, filter replacements, lubrication.

Periodic Lubrication:

Lubrication points and schedules for various chassis and drivetrain components.

Procedures Included

Diagnostic Procedures:

Troubleshooting common issues, symptom analysis, component testing.

Repair Procedures:

Step-by-step instructions for disassembly, repair, reassembly of all covered systems.

Maintenance Procedures:

Detailed guidance on scheduled maintenance tasks.

Electrical Troubleshooting:

Systematic approach to diagnosing electrical faults with wiring diagrams.

Engine Rebuilding:

Comprehensive instructions for engine disassembly, inspection, repair, and reassembly.

Fuel Injection Adjustment:

Precise instructions for calibrating and adjusting the Bosch mechanical fuel injection system.

Technical Depth

Depth:

Complete factory-level service and repair information, suitable for experienced mechanics and dedicated DIY enthusiasts.

Illustration Quality:

Hundreds of detailed photos, illustrations, and drawings to guide procedures.

Instruction Format:

Numbered step-by-step instructions, detailed substeps, notes, cautions, and warnings.

📊 Manual Specifications

File Format

Format:

Print Quality

Print Restriction:

Printable without restriction

Binding Type

Binding:

Digital Download (printable into a bound manual)

Paper Type

Paper Type:

N/A (Digital Download)

Software Requirement

Reader Requirement:

Adobe PDF Reader

Delivery Method

Delivery:

Instant download link provided after payment

⚙️ Engine Specifications

Primary Engine

Engine Type:

Inline-6 Cylinder, SOHC (M114)

Displacement:

2.8 Liters (2778 cc)

Bore X Stroke:

86.5 mm x 80.2 mm

Performance

Horsepower:

Approximately 170-180 hp (SAE Gross) depending on specific model year and tuning.

Torque:

Approximately 180-190 lb-ft (SAE Gross) depending on specific model year and tuning.

Fuel System

Fuel Delivery:

Bosch Mechanical Fuel Injection (CIS - Continuous Injection System)

Fuel Type:

Unleaded Gasoline (premium recommended)

Ignition System

Ignition Type:

Distributor-based, electronic ignition (later models may feature transistorized ignition).

🔧 Transmission

Standard

Transmission Type:

4-speed Manual Transmission (standard on some models)

Optional

Transmission Type:

4-speed Automatic Transmission (optional)

Features

Fluid Type:

Refer to manual for specific automatic transmission fluid (e.g., Dexron III or equivalent) and manual gearbox oil specifications.

📐 Dimensions

Exterior

Wheelbase:

Approximately 2710 mm (106.7 inches)

Overall Length:

Approximately 4740 mm (186.6 inches)

Overall Width:

Approximately 1760 mm (69.3 inches)

Overall Height:

Approximately 1420 mm (55.9 inches)

Weights

Curb Weight:

Approximately 1450-1550 kg (3197-3417 lbs) depending on options and transmission.

🛡️ Safety Features

Ratings

Safety Standards:

Reflects safety standards of the early to mid-1970s, focusing on passive safety features like a robust chassis and seat belts.

Active Features

Braking System:

Hydraulic power-assisted disc brakes front, drum brakes rear.

Passive Features

Seatbelts:

Standard three-point seatbelts in the front, lap belts in the rear.

Structural Integrity:

Designed with a strong monocoque body structure typical of Mercedes-Benz engineering of the era.

💡 Technology Features

Infotainment

Radio System:

Typically featured an AM/FM radio, potentially with an optional cassette player. Speaker configurations varied.

Driver Assistance

Features:

Limited driver assistance features by modern standards. Focus was on mechanical and electrical systems.

Connectivity

Connectivity Options:

None by modern definition; connectivity was limited to the vehicle's internal electrical systems.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically every 5,000 - 7,500 miles (8,000 - 12,000 km) or 6-12 months, as per the manual's recommendation for optimal engine health.

Tune Up Interval:

Spark plugs, ignition points (if applicable), filters, and fluid checks recommended at intervals specified in the manual, often around 15,000 - 30,000 miles.

Fluid Specifications

Engine Oil:

Refer to manual for specific API service classification and viscosity grade (e.g., SAE 10W-40 or 20W-50 depending on climate).

Coolant:

Ethylene glycol-based coolant with a 50/50 mix of coolant and distilled water for freeze and corrosion protection.

Brake Fluid:

DOT 3 or DOT 4 glycol-based brake fluid is typically specified.

Known Issues

Common Problems:

Common issues may include aging rubber components (hoses, bushings), fuel injection system adjustments, vacuum leaks, and rust on body panels, especially in certain climates.

Preventative Maintenance:

Regular inspection and replacement of hoses, belts, and chassis bushings are crucial for maintaining reliability. Timely maintenance of the fuel injection system is vital for performance and emissions.

📚 Vehicle History

Brand Heritage

Brand Legacy:

Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and durability, established long before the W114 era.

Model Evolution

W114 W115 Lineage:

The W114/W115 range, often referred to as the 'Stroke Eight' series, replaced the W108/W109 S-Class and introduced a more modern design language and unibody construction.

280 Model Significance:

The 280 model represented the more powerful, six-cylinder variant within the W114 range, offering improved performance and refinement.

Production

Manufacturing Location:

Primarily manufactured in Germany.

Series Production Years:

1968-1976

🏆 Awards & Recognition

Recognitions

Design Acclaim:

The W114/W115 series was generally well-received for its modern styling and comfortable ride, considered a significant advancement in Mercedes-Benz's mid-size offerings.