Mercedes Benz W114 1967-1976 Workshop Service Repair Manual

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Sku: 155395

Tags: 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 Car Cars Mercedes Mercedes-benz W114

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Description

The Mercedes-Benz W114, produced from 1967 to 1976, represents the first generation of the marque's mid-size luxury sedan and coupe offerings. Known for its elegant, understated design and robust engineering, the W114 was a testament to Mercedes-Benz's commitment to durability and quality. It competed with other premium European vehicles of its era, featuring advanced (for its time) suspension and braking systems, and was available with reliable inline-four and inline-six gasoline engines, primarily the 2.5L M114 and 2.8L M130, often equipped with Bosch D-Jetronic fuel injection. This model series was developed as a successor to the W110 Fintail, introducing a more modern unibody construction and independent rear suspension, solidifying Mercedes-Benz's reputation for engineering excellence and safety. This comprehensive Workshop Service Repair Manual, presented in English and spanning over 5000 pages, provides detailed guidance for the maintenance, repair, and troubleshooting of the Mercedes-Benz W114. It covers all essential systems, including the engine, transmission, fuel, cooling, ignition, brake, suspension, steering, electrical systems, and bodywork. The manual offers step-by-step instructions for disassembly, assembly, adjustments, and component replacement, supported by detailed illustrations, exploded diagrams, and electrical schematics. It also includes routine maintenance procedures, diagnostic routines for common issues, and specific torque values, making it an indispensable resource for mechanics and DIY enthusiasts alike.

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

Generation

Generation Name:

First Generation

Codes

Chassis Code:

W114 (Sedan/Coupe)

👋 Introduction

Market Position

Segment:

Mid-size luxury sedan and coupe, known for its build quality, engineering, and comfort.

Competitive Analysis

Competitors:

Competed with other European luxury marques such as BMW (E3 Neue Klasse), Audi, and other premium offerings from American manufacturers.

Key Features

Design Philosophy:

Elegant, understated design with a focus on durability and engineering excellence, characteristic of Mercedes-Benz during this era.

Engineering Highlights:

Robust construction, advanced (for its time) suspension and braking systems, and reliable powertrain options.

📋 Manual Details

Coverage Areas

Coverage Years:

1967-1976

Page Count

Total Pages:

Over 5000

Manual Type

Type:

Workshop Service Repair Manual

Completeness:

100% complete and intact, no missing/corrupt pages/sections.

Language

Language:

English

Format

Format:

📖 Manual Coverage

Systems Covered

Engine:

Detailed coverage including disassembly, assembly, inspection, repair, and adjustment of all engine variants.

Transmission:

Manual and automatic transmission servicing, repair, and adjustment procedures.

Fuel System:

Fuel injection (Bosch D-Jetronic for many variants), carburetion (where applicable), fuel pump, fuel lines, and tank service.

Cooling System:

Radiator, water pump, thermostat, hoses, and fan servicing and replacement.

Ignition System:

Distributor, spark plugs, ignition coils, and wiring diagnostics and repair.

Brake System:

Hydraulic system, brake pads, rotors, calipers, wheel cylinders, master cylinder, and bleeding procedures.

Suspension:

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

Steering:

Steering gearbox, tie rods, power steering pump (if equipped), and steering column adjustments.

Electrical System:

Wiring diagrams, battery, alternator, starter, lighting, dashboard instruments, and accessory circuits.

Bodywork:

Door mechanisms, window regulators, body panel repair, trim, and chassis component removal/installation.

Heating And Air Conditioning:

HVAC system components, blower motor, heater core, evaporator, and refrigerant service (where applicable).

Exhaust System:

Exhaust manifolds, pipes, mufflers, and catalytic converters (if equipped).

Dashboard Instruments:

Repair and calibration of speedometer, tachometer, fuel gauge, temperature gauge, and warning lights.

Lighting System:

Headlights, taillights, turn signals, interior lighting, and electrical circuits.

Procedures Included

Maintenance:

Routine maintenance checks, lubrication points, filter replacements, and fluid changes.

Troubleshooting:

Systematic diagnostic procedures for common and complex issues, including fault finding and solutions.

Repair:

Detailed step-by-step instructions for component repair, overhaul, and replacement.

Installation:

Correct installation procedures for all vehicle components and systems.

Disassembly:

Comprehensive instructions for dismantling various vehicle parts and assemblies.

Adjustments:

Precise instructions for adjusting engine timing, carburetor, brakes, clutch, and other critical components.

Wheel Alignment:

Detailed procedures for front and rear wheel alignment specifications and adjustments.

Engine Diagnostics:

Diagnostic routines for identifying engine performance issues, including compression testing, ignition system checks, and fuel system analysis.

Torque Specifications:

Comprehensive torque values for all critical fasteners, essential for proper assembly and safety.

Schematics:

Includes electrical schematics, vacuum diagrams, and hydraulic circuits.

Special Tools:

References and illustrations for specialized tools required for specific repair and adjustment operations.

Technical Depth

Depth:

Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostics and specifications.

Pictorial Diagrams:

Includes detailed illustrations, exploded diagrams, drawings, and photos for step-by-step guidance.

Manual Type

Intended Audience:

Mechanics and DIY enthusiasts.

📊 Manual Specifications

File Format

Format:

Print Quality

Printability:

Yes, all pages are printable.

Binding Type

Binding Type:

Digital (PDF Download)

Paper Type

Paper Type:

N/A (Digital)

Software Requirements

Reader:

Adobe Reader

Compatibility

Operating Systems:

Windows, Mac, Linux OS

File Quality

Text Searchability:

Likely searchable if created from digital text, otherwise may require OCR.

⚙️ Engine Specifications

Primary Engine

Engine Options:

Primarily 2.5L (M114) and 2.8L (M115/M130) inline-six gasoline engines. Early models may have featured smaller 4-cylinder engines (M115).

Engine Configuration:

Inline-4 and Inline-6 cylinder configurations.

Performance

Horsepower Range:

Approximately 120-140 hp for the 2.5L, and 140-160 hp for the 2.8L variants.

Torque Range:

Torque figures varied by engine, typically in the range of 180-220 Nm.

Fuel System

Fuel Delivery:

Bosch D-Jetronic electronic fuel injection was common on many models, especially the 2.8L variants. Some earlier or base models may have used Solex carburetors.

Engine Codes

Common Engine Codes:

M114 (2.5L), M115 (2.3L I4), M130 (2.8L I6)

🔧 Transmission

Standard

Standard Transmission:

4-speed manual transmission was standard on many models.

Optional

Optional Transmission:

Optional 3-speed or 4-speed automatic transmission (e.g., 'Hydrak' automatic transmission or later MB automatic transmissions).

Features

Clutch Type:

Single-plate dry clutch for manual transmissions.

📐 Dimensions

Exterior

Body Styles:

4-door Sedan and 2-door Coupe.

Weights

Curb Weight:

Approximately 1450-1600 kg depending on body style and engine.

🛡️ Safety Features

Ratings

Crash Testing:

While formal crash ratings as we know them today were not standardized, Mercedes-Benz vehicles of this era were known for their robust safety cell and structural integrity.

Active Features

Braking System:

Front disc brakes and rear drum brakes, often with dual-circuit hydraulic systems.

Passive Features

Chassis Design:

Reinforced passenger compartment, collapsible steering column, and safety glass.

💡 Technology Features

Infotainment

Audio System:

Typically featured analog AM/FM radios, with optional tape decks available on later models.

Driver Assistance

Anti-lock Braking System (ABS) was not commonly available on W114 models; advanced braking systems were still in early development stages.

Connectivity

Connectivity Features:

No modern connectivity features such as Bluetooth or USB ports were standard; connectivity was limited to basic radio functions.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically every 5,000-10,000 km, or annually, depending on driving conditions and lubricant used (refer to specific manual sections for exact intervals).

Tune Up Interval:

Spark plug replacement, ignition timing adjustment, and fuel system checks were generally recommended every 20,000-40,000 km.

Fluid Specifications

Engine Oil:

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

Coolant:

Ethylene glycol-based antifreeze with corrosion inhibitors. Consult manual for specific mix ratios and type.

Transmission Fluid:

Specific automatic transmission fluid (ATF) for automatic transmissions; gear oil for manual transmissions (refer to manual for exact specifications and capacities).

Brake Fluid:

DOT 3 or DOT 4 hydraulic brake fluid, depending on the specific system design.

Known Issues

Common Problems:

Rust/corrosion, aging rubber components (hoses, bushings), potential wear in the rear axle/differential, fuel injection system maintenance (D-Jetronic), and electrical connector issues.

Maintenance Priority:

Regularly check and replace aging rubber components, address any rust proactively, and ensure proper functioning of the fuel and ignition systems.

📚 Vehicle History

Brand Heritage

Brand Legacy:

Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and safety, dating back to the invention of the automobile.

Model Evolution

W114 Development:

The W114/W115 series was developed as a successor to the W110 Fintail series, introducing a more modern unibody construction and independent rear suspension.

Production

Production Period:

1967-1976

Production Locations:

Primarily manufactured in Germany, with some production also occurring in other international facilities.

🏆 Awards & Recognition

Recognitions

Design Awards:

The W114/W115 series was acclaimed for its timeless design and engineering robustness, contributing to Mercedes-Benz's reputation for quality.

Ratings

Reliability Reputation:

Generally considered a reliable and durable vehicle when properly maintained, reflecting Mercedes-Benz's engineering standards of the era.