Mercedes-benz W123 280E 1985 Workshop Service Repair Manual

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🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280E Year: 1985 Codes Chassis Code: W123 Engine Code: M110.987 👋 Introduction Market Position Target Audience: Do-it-yourself enthusiasts and experienced professional mechanics...

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Type: Car

Vendor:

Sku: 400657

Tags: 1985 280E Car Cars Mercedes Mercedes-benz W123

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Description

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

W123 280E

Year:

Codes

Chassis Code:

Engine Code:

M110.987

👋 Introduction

Market Position

Target Audience:

Do-it-yourself enthusiasts and experienced professional mechanics

Value Proposition:

Comprehensive, cost-effective alternative to overpriced physical manuals and dealership service.

Competitive Analysis

Advantage:

Official factory data provides accuracy and completeness unmatched by generic aftermarket guides.

Key Features

Illustrations:

Hundreds of detailed illustrations, drawings, and photos

Navigation:

Numbered table of contents for quick information retrieval

Visual Aids:

Enlarged insets for detailed part examination

📋 Manual Details

Coverage Areas

Region:

Global (Factory Standards)

Specific Models Covered:

Mercedes-Benz W123 280E (1985 model year)

Page Count

Estimated Pages:

Hundreds (precise count not specified but implied to be extensive)

Manual Type

Type:

Workshop Service Repair Manual

Language

Language:

English

Format

File Format:

📖 Manual Coverage

Systems Covered

Mechanical Systems:

Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Cooling, Fuel, Exhaust

Electrical Systems:

Ignition, Starting, Charging, Lighting, Instrumentation, Power Accessories, Wiring Diagrams

Bodywork:

Body and Chassis, Interior Trim, Exterior Components, Glass, Seals

Procedures Included

Maintenance:

Scheduled Maintenance, Fluid Changes, Filter Replacements, Inspections

Repair And Rebuild:

Engine Overhaul, Transmission Rebuilding, Component Replacement, System Repairs

Troubleshooting:

Diagnostic Procedures, Fault Finding, Common Issues and Solutions

Technical Depth

Depth:

Complete Factory Level Detail, From Basic Maintenance to Full Rebuilds

Documentation Style:

Step-by-step instructions, detailed substeps, notes, cautions, warnings

📊 Manual Specifications

File Format

Digital Format:

Print Quality

Printability:

Fully Printable (individual pages or entire manual)

Binding Type

Physical Binding Equivalent:

Digital Download (printable for user-created binding)

Paper Type

Physical Paper Equivalent:

User-printable on standard paper

⚙️ Engine Specifications

Primary Engine

Engine Type:

Inline 6-Cylinder, Naturally Aspirated

Displacement:

2.8 Liters (2799 cc)

Engine Code:

M110.987

Performance

Horsepower Approx:

185 hp @ 5800 rpm (approximate for European spec, US spec may vary)

Torque Approx:

240 Nm @ 3500 rpm (approximate for European spec)

Fuel System

Fuel Delivery:

Bosch K-Jetronic Mechanical Fuel Injection

Fuel Type:

Unleaded Gasoline (Premium Octane Recommended)

🔧 Transmission

Standard

Transmission Type Standard:

4-speed Manual Transmission (likely standard in many markets for 280E)

Optional

Transmission Type Optional:

4-speed Automatic Transmission (optional, often referred to as '722.1' or '722.3' series)

Features

Fluid Type:

ATF Dexron III (for automatic) / Gear Oil GL-4 (for manual, specific viscosity to be confirmed in manual)

📐 Dimensions

Exterior

Body Style:

4-door Sedan (Saloon)

Wheelbase:

2810 mm (110.6 inches)

Weights

Curb Weight Approx:

1470 kg (3240 lbs) - varies by option and market

🛡️ Safety Features

Ratings

Crash Safety Era:

Designed to late 1970s/early 1980s safety standards, with significant improvements over predecessors.

Active Features

Braking System:

Front Disc Brakes, Rear Disc Brakes (typically ventilated front discs), Vacuum Servo Assist

Passive Features

Chassis Construction:

Monocoque construction with integrated crumple zones

Seatbelts:

Standard front seatbelts, often with inertia reels; rear seatbelts

💡 Technology Features

Infotainment

Audio System:

Factory original radio/cassette player (e.g., Becker models), optional features like power antenna.

Driver Assistance

Climate Control:

Optional Air Conditioning (often belt-driven compressor), manual ventilation systems.

Cruise Control:

Optional Cruise Control System (likely vacuum or electronically controlled).

Connectivity

Connectivity Features:

Limited by era; primarily focused on core vehicle functions.

🔧 Maintenance

Service Intervals

Oil Change Interval Approx:

Every 10,000 - 15,000 km or 6-12 months (depending on driving conditions and oil used).

Major Service Interval Approx:

Every 30,000 - 50,000 km (includes inspections of critical components, spark plugs, belts, etc.).

Fluid Specifications

Engine Oil Type:

API SG or higher, SAE 10W-40 or 15W-40 recommended (specific Mercedes-Benz approval to be confirmed in manual, e.g., MB 227.1, 228.1)

Coolant Type:

Mercedes-Benz approved coolant concentrate (e.g., G05 or similar ethylene glycol based) mixed with distilled water (50/50 ratio).

Brake Fluid Type:

DOT 3 or DOT 4

Known Issues

Common Wear Items:

Vacuum system leaks (affecting central locking, climate control, engine idle), differential seals, transmission mounts, flex discs, ball joints, rust in common areas (wheel arches, sills, jacking points).

Engine Specifics:

M110 engine: Potential for valve guide wear, timing chain stretch over high mileage. K-Jetronic system can be sensitive to fuel quality and requires meticulous maintenance.

📚 Vehicle History

Brand Heritage

Manufacturer Reputation:

Mercedes-Benz: Known for engineering excellence, durability, luxury, and safety innovations.

Model Evolution

W123 Generation:

Second generation of the mid-size Mercedes-Benz model range (1976-1985). Known for its exceptional build quality and longevity.

280E Positioning:

Positioned as a powerful, refined, and comfortable engine option within the W123 lineup, bridging the gap between the four-cylinder models and the V8 variants.

Production

Production Period W123:

1976 – 1985

Manufacturing Locations:

Primarily Germany (Sindelfingen, Bremen, Untertürkheim), with global assembly plants.

🏆 Awards & Recognition

Recognitions

General Reputation:

The W123 chassis is widely acclaimed for its legendary durability and reliability, often cited as one of the most over-engineered Mercedes-Benz models.

Industry Standing:

Considered a benchmark for build quality and longevity in its segment during its production run.