1977-1985 Mercedes-Benz Typ-123 (300D Turbodiesel Sedan) Workshop Repair Service Manual Best

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🏷️ Basic Information Identification Make: Mercedes-Benz Model: Typ-123 Model Variant: 300D Turbodiesel Sedan Production Years Covered: 1977-1985 Chassis Code: W123 Codes Engine Code: OM617 (Turbocharged Inline-5 Diesel) 👋 Introduction Market...

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Type: Car

Vendor:

Sku: 336189

Tags: 1977 1978 1979 1980 1981 1982 1983 1984 1985 300D Turbodiesel Sedan 400 Car Cars Mercedes Mercedes-benz Typ-123

Product variants

Description

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

Typ-123

Model Variant:

300D Turbodiesel Sedan

Production Years Covered:

1977-1985

Chassis Code:

Codes

Engine Code:

OM617 (Turbocharged Inline-5 Diesel)

👋 Introduction

Market Position

Positioning:

Essential technical resource for owners and mechanics of the Mercedes-Benz W123 300D Turbodiesel Sedan.

Competitive Analysis

Value Proposition:

Provides professional-level repair and maintenance information, comparable to factory service manuals, at a fraction of the cost and with instant digital access.

Key Features

Content Highlight:

Covers the entirety of vehicle systems and repair procedures, from basic maintenance to complex overhauls, with detailed illustrations.

📋 Manual Details

Coverage Areas

Scope:

Comprehensive repair, maintenance, rebuilding, refurbishment, and restoration

Diagnostic Procedures:

Detailed diagnostic and repair procedures

Technical Documentation:

Information used by professional technicians and mechanics

Page Count

Estimated Pages:

N/A (Digital Download)

Manual Type

Type:

Workshop Repair Service Manual

Language

Language:

English

Format

Digital Format:

Downloadable:

Compatibility:

All Versions of Windows, Mac, Linux

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Engine Lubrication System:

Engine Cooling System:

Engine Control System:

Fuel System:

Exhaust System:

Clutch:

Manual Transaxle:

Automatic Transaxle:

Front Axle:

Rear Axle:

Front Suspension:

Rear Suspension:

Road Wheels And Tyres:

Brake System:

Parking Brake System:

Brake Control System:

Power Steering System:

Steering System:

Seat Belts:

Supplemental Restraint System Srs:

Body Lock And Security System:

Glasses Window System And Mirrors:

Roof:

Exterior And Interior:

Instrumental Panel:

Seat:

Air Conditioner System:

Wiring Diagrams:

Starting And Charging System:

Lighting System:

Driver Information System:

Wiper Washer And Horn:

Body Control System:

Lan System:

Audio Visual Navigation And Telephone System:

Auto Cruise Control System:

Power Supply Ground And Circuit Elements:

Maintenance Procedures:

Procedures Included

Maintenance:

Troubleshooting:

Repair:

Rebuilding:

Refurbishment:

Restoration:

Technical Depth

Depth:

Detailed diagnostic and repair procedures covering all aspects from A-Z

Illustrations:

High Quality Photos, Illustrations And Diagrams

Completeness:

100% Complete and Intact, No Missing/Corrupt Pages/Sections

📊 Manual Specifications

File Format

Format:

Searchable:

Yes (Implied by PDF format for digital download)

Print Quality

Quality:

High Quality Digital Content

Binding Type

Type:

N/A (Digital Download)

Paper Type

Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Inline 5-Cylinder Diesel with Turbocharger

Engine Code:

OM617.952

Displacement:

3.0 Liters (2998 cc)

Performance

Horsepower Net Est:

125 hp @ 4350 rpm

Torque Net Est:

184 lb-ft (250 Nm) @ 2400 rpm

Fuel System

Fuel Delivery:

Bosch Inline Fuel Injection Pump with Turbocharger

Recommended Fuel:

Diesel Fuel (refer to manual for specific grade recommendations)

🔧 Transmission

Standard

Type:

4-Speed Automatic (4G-Tronic)

Optional

Type:

4-Speed Manual

Features

Transmission Fluid Type:

MB 236.1 or equivalent (specific viscosity may vary, consult manual)

📐 Dimensions

Exterior

Length:

188.2 inches (4780 mm)

Width:

69.5 inches (1765 mm)

Height:

56.1 inches (1425 mm)

Weights

Curb Weight Est:

3400-3600 lbs (1542-1633 kg)

🛡️ Safety Features

Passive Features

Seatbelts:

Standard seat belts

Body Construction:

Reinforced safety cage, crumple zones

💡 Technology Features

Infotainment

Features:

Basic AM/FM radio, optional cassette player. Emphasis on mechanical and functional systems rather than advanced electronics.

Driver Assistance

Features:

Power steering, optional cruise control (auto-cruise control system covered in manual).

🔧 Maintenance

Service Intervals

Oil Change Interval Engine:

Typically 3,000-5,000 miles or 6 months (refer to manual for specific recommendation based on driving conditions).

Fuel Filter Replacement:

Recommended every 15,000-20,000 miles (consult manual).

Air Filter Replacement:

Recommended every 15,000-20,000 miles or as needed based on driving environment (consult manual).

Fluid Specifications

Engine Oil Type:

API CD or better, SAE 15W-40 or 10W-30 depending on climate (consult manual for precise specification).

Coolant Type:

Ethylene glycol based, 50/50 mix with distilled water (refer to manual for specific Mercedes-Benz specification).

Known Issues

Common Wear Items:

Vacuum leak issues (central locking, climate control), injector pump seals, glow plug system, valve seals, and potential rust in certain areas.

Diesel Specific Concerns:

Glow plug reliability, injection pump timing, injector health, and fuel system cleanliness.

📚 Vehicle History

Brand Heritage

Heritage:

Mercedes-Benz is renowned for its engineering excellence, durability, and luxury, with a long history of producing robust diesel vehicles.

Model Evolution

W123 Introduction:

The W123 generation replaced the W114/W115 and was produced from 1975 to 1986. The 300D Turbodiesel variant, introduced later in the W123's lifecycle, brought enhanced performance to the robust diesel platform.

Production

Production Period:

1975-1986 (W123 platform), 1977-1985 specifically for 300D Turbodiesel Sedan in this manual's coverage.

🏆 Awards & Recognition

Recognitions

Reputation:

The W123 series is widely regarded as one of the most durable and reliable Mercedes-Benz models ever produced, often called 'the tank' for its build quality and longevity.

Ratings

Reliability Perception:

Exceptional, especially for the diesel variants, due to robust engineering and simple, durable components.