Target Audience:
Owners, DIY mechanics, independent repair shops specializing in classic Mercedes-Benz vehicles.
Primary Benefit:
Cost-effective vehicle maintenance and repair.
Value Proposition:
Empowers users to understand and maintain their vehicle, preventing future issues and saving money.
Primary Coverage:
Service and Repair Procedures
Secondary Coverage:
Maintenance Schedules, Diagnostics, Troubleshooting
Estimated Page Count:
Detailed (specific count not provided, but comprehensive)
Manual Type:
Service and Repair Manual
File Format:
PDF Download
Engine Systems:
Engine, Fuel System, Cooling System, Emission Control
Powertrain Systems:
Transmission (implied, typical for service manuals)
Electrical Systems:
Electrical System
Body And Trim:
Implied coverage for body maintenance and trim component access.
Maintenance Procedures:
Periodic Maintenance, Fluid Changes, Filter Replacements
Repair Procedures:
Engine Repair, Fuel System Repair, Cooling System Repair, Electrical Component Repair
Diagnostic Procedures:
Troubleshooting, Fault Finding
Emission Control Service:
Information on emission control systems relevant to the era, potentially including basic adjustments or component identification.
Torque Specifications:
Essential torque specifications for critical fasteners across all systems.
Troubleshooting Charts:
Systematic troubleshooting guides for common vehicle problems.
Depth Of Information:
Comprehensive, covering repairs for everyday issues to more complex mechanical tasks.
Engine Repair Scope:
Detailed engine overhaul procedures, including cylinder head removal, piston/ring replacement, crankshaft and bearing service.
Fuel System Diagnostics:
In-depth fuel system diagnostics, including fuel pump testing, injector flow testing, injection timing adjustments.
Electrical System Schematics:
Includes detailed wiring diagrams for all major electrical components and systems.
Chassis Component Overhaul:
Procedures for brake system repair (including disc and drum), steering system overhaul, suspension component replacement (shocks, bushings), and wheel bearing service.
Body Styles Available:
Sedan (W123), Wagon (S123), Coupe (C123), Limousine (V123 - less common for 240D)
Curb Weight:
Approx. 1350-1500 kg (depending on body style and equipment)
Gross Vehicle Weight Rating:
Typically around 1900-2000 kg
Oil Change Interval:
Typically 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions.
Fuel Filter Replacement:
Recommended at 10,000-15,000 miles (16,000-24,000 km), or as per manual recommendations.
Air Filter Replacement:
Typically 15,000-20,000 miles (24,000-32,000 km).
Transmission Fluid Change:
Manual: As per manual (typically around 50,000 miles). Automatic: 30,000-50,000 miles or as specified.
Engine Oil Specification:
API CD or equivalent diesel engine oil (e.g., SAE 15W-40 or 10W-30 depending on climate). Refer to manual for specific viscosity.
Coolant Specification:
Ethylene glycol based coolant, typically a 50/50 mix with distilled water.
Transmission Fluid Manual:
GL-4 Gear Oil (e.g., SAE 75W-90 or 80W-90)
Transmission Fluid Automatic:
Dexron III or equivalent ATF (Automatic Transmission Fluid)
Power Steering Fluid:
Typically Mercedes-Benz Power Steering Fluid or equivalent Pentosin CHF 11S for later models, but manual will specify.
Brake Fluid Specification:
DOT 3 or DOT 4 brake fluid.
Common Wear Items:
Glow plugs, injection pump seals, vacuum lines, front suspension bushings, exhaust system.
Diesel Specific Concerns:
Cold start performance, potential for air in fuel lines, injector nozzle wear.
Mercedes Benz Philosophy:
Engineering excellence, durability, comfort, and safety.
W123 Generation Context:
Part of the highly successful W123 generation, known for its robustness and longevity.
W123 Sedan Durability Reputation:
The W123 series, including the 240D, is renowned globally for its exceptional durability and ability to withstand high mileage with proper maintenance.
Production Period W123:
1976-1986 (W123 generation as a whole)
240D Market Positioning:
Entry-level diesel model, known for fuel economy and reliability over performance.
