🏷️ Basic Information

Make:

Mercedes-Benz

Model:

W123 (200D, 240D, 240TD, 300D, 300TD)

Product Name:

Mercedes-benz W123 200d 240d 240td 300d 300td Service Repair Manual 1976-1985

Production Years Covered:

1976-1985

Chassis Code:

W123

👋 Introduction

Target Audience:

Mercedes-Benz W123 owners, DIY enthusiasts, professional mechanics.

Value Proposition:

Provides professional-level repair information to enable cost savings on maintenance and repairs.

Ease Of Use:

Easy to follow, step-by-step instructions for all skill levels.

Accessibility:

Instant download for immediate access, no shipping or waiting.

📋 Manual Details

Manual Scope:

Complete repair and service information

Page Count:

Not specified (implied comprehensive)

Manual Type:

Digital Service Repair Manual

Language:

English

File Format:

PDF

Downloadable:

YES

Operating Systems:

All Versions of Windows & Mac

Software Requirements:

Adobe PDF Reader

📖 Manual Coverage

Engine Mechanical:

Full engine overhaul, rebuilding, maintenance, diagnostics for OM615, OM616, OM617 diesel engines.

Fuel System:

Diesel injection systems (Bosch VE, Bosch MW), fuel pumps, injectors, fuel lines, tank.

Transmission Manual:

Manual transmission (4-speed, 5-speed) service, repair, and overhaul.

Transmission Automatic:

Automatic transmission (3-speed, 4-speed) service, repair, and overhaul, including hydraulic control systems.

Drivetrain:

Driveshafts, universal joints, rear axle, differential service and repair.

Suspension:

Front and rear suspension systems, control arms, ball joints, tie rods, shock absorbers, springs.

Steering:

Power steering system, steering box, steering column, linkages.

Brakes:

Front and rear disc/drum brakes, hydraulic system, ABS (if equipped), parking brake.

Electrical System:

Battery, alternator, starter, ignition system (if gasoline variant covered), lighting, wiring diagrams, fuses, relays.

Body And Chassis:

Body construction, doors, windows, interior trim, rust repair, frame straightening.

Heating And Ventilation:

HVAC system, blower motor, heater core, climate control.

Maintenance Procedures:

Oil changes, filter replacements, coolant flushes, lubrication, belt adjustments, spark plug (if applicable) replacement.

Troubleshooting:

Diagnostic procedures for common and uncommon problems across all systems.

Repair Procedures:

Step-by-step instructions for component removal, repair, and reinstallation.

Rebuilding Procedures:

Detailed guides for engine and transmission rebuilds.

Restoration Guidance:

Information useful for restoring the vehicle to its original condition.

Depth Of Coverage:

Comprehensive, from basic maintenance to full engine and transmission rebuilds, suitable for professional technicians and DIY enthusiasts.

Diagnostic Capabilities:

Includes diagnostic charts and flowcharts for identifying issues.

Schematics:

Detailed electrical wiring diagrams.

📊 Manual Specifications

File Type:

PDF

Printability:

All pages are printable for workshop use.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Visual Aids:

Illustrations, diagrams, pictures.

Instructions:

Step-by-step instructions, procedures.

Searchability:

Likely searchable text within the PDF format.

⚙️ Engine Specifications

Engine Codes Covered:

OM615 (200D), OM616 (240D, 240TD), OM617 (300D, 300TD)

Engine Type:

Naturally Aspirated Inline-4 and Inline-5 Diesel Engines

200D Displacement:

1988 cc (1.988 L)

240D Displacement:

2399 cc (2.399 L) / 2404 cc (2.404 L)

300D Displacement:

2998 cc (2.998 L) / 3005 cc (3.005 L)

200D Horsepower Approx:

55-70 hp (varies by market and year)

240D Horsepower Approx:

65-72 hp (varies by market and year)

300D Horsepower Approx:

70-88 hp (varies by market and year)

Injection System:

Bosch inline injection pump (VE or MW) and injectors

Fuel Type:

Diesel fuel

Cooling Type:

Liquid-cooled

Oil Capacity:

Approx. 6-7 liters (check manual for specific engine)

🔧 Transmission

Available Transmissions:

4-speed manual, 5-speed manual, 3-speed automatic, 4-speed automatic

Automatic Transmission Type:

Hydraulic automatic transmission

Automatic Transmission Fluid Type:

MB 236.1 specification automatic transmission fluid (e.g., Dexron II compatible)

Manual Transmission Fluid Type:

GL-4 gear oil (e.g., SAE 75W-90 or 80W-90)

📐 Dimensions

Body Styles:

Saloon (4-door sedan), Estate (S123 wagon)

Curb Weight:

Approx. 1300-1500 kg (varies by model and equipment)

🛡️ Safety Features

Brakes:

Front disc brakes, rear drum brakes (later models may have rear discs). Optional ABS on some later models.

Seatbelts:

Standard seatbelts; pre-tensioners introduced later in the production run.

💡 Technology Features

Original Features:

Basic AM/FM radio, optional cassette player, analog gauges.

Driver Assistance Systems:

Optional ABS on later models, primarily mechanical systems otherwise.

Original Connectivity:

N/A (Pre-digital era connectivity)

🔧 Maintenance

Oil Change Interval:

Typically every 5,000 - 10,000 km or annually (refer to manual for precise intervals).

Air Filter Replacement:

Every 15,000 - 20,000 km or as needed.

Fuel Filter Replacement:

Every 20,000 - 30,000 km or annually.

Engine Oil Specification:

API CD or CE rated diesel engine oil, viscosity SAE 10W-40 or 15W-40 depending on climate.

Coolant Specification:

Mercedes-Benz approved coolant (e.g., MB 325.0) or equivalent ethylene glycol-based antifreeze, mixed 50/50 with distilled water.

Common Wear Items:

Glow plugs, vacuum lines, fuel injection pump seals, suspension bushings, heater control valves, exhaust systems, climate control actuators.

Rust Prone Areas:

Wheel arches, door bottoms, jacking points, sills, battery tray area, fuel tank area.

📚 Vehicle History

Manufacturer Reputation:

Mercedes-Benz is renowned for build quality, durability, and engineering excellence.

W123 Legacy:

The W123 series is celebrated for its robust construction, longevity, and comfort, often considered one of the most reliable Mercedes-Benz models ever produced. It succeeded the W114/W115 and was replaced by the W124.

Manufacturing Locations:

Primarily Germany (Sindelfingen), with some production in other global facilities.

🏆 Awards & Recognition

Model Reputation:

The W123 is widely regarded as a 'future classic' and a benchmark for durability and reliability in automotive history.