🏷️ Basic Information

Make:

Mercedes-Benz

Model:

W124 E-Class

Year:

1987

Chassis Code:

W124

Model Designation:

E-Class (specific model within W124 chassis depends on engine and body style, e.g., 300E, 260E, 230E, 300D, etc.)

👋 Introduction

Vehicle Class:

Luxury/Executive Sedan, Coupe, Convertible, Wagon

Brand Reputation:

Mercedes-Benz is renowned for its build quality, engineering excellence, and durability, often referred to as 'over-engineered'.

Key Competitors:

BMW 5 Series (E28/E34), Audi 100/200, Volvo 700 Series, Jaguar XJ

Manual Advantages:

Vehicle-specific, factory-level detail, comprehensive A-Z coverage, digital format for ease of use and portability, printable sections, includes wiring schematics.

Vehicle Strengths:

Exceptional build quality, robust engineering, comfortable ride, sophisticated design, advanced safety features for its era.

📋 Manual Details

Overall Coverage:

All models and all repairs A-Z for the 1987 W124 E-Class

Specific Systems:

Engine, Control System, Mechanical, Fuel Service Specifications, Emission Control, Intake Exhaust Cooling, Lube, Ignition Starting Charging, Auto Transmission, Clutch, Manual Transmission, Transfer Propeller Shaft, Drive Shaft, Differential, Axle Suspension, Tire & Wheel, Brake Control, Brake, Parking Brake, Steering Column, Power Steering, Air Condition, Suppl Restraint System, Seat Belt, Engine Immobilizer, Cruise Control, Wiper & Washer, Door Lock, Meter Audio/Visual, Horn, Windshield/Glass Mirror, Instrument Panel, Seat, Engine Hood/ Door, Exterior & Interior, Electrical, Multiplex/ CAN Communication.

Estimated Page Count:

Likely several hundred pages, typical for a comprehensive factory service manual. Specific count not provided, but implied to be extensive.

Type:

Factory Service and Repair Manual

Language:

English

Digital Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Detailed coverage of engine assembly, disassembly, rebuilding, cylinder head, pistons, crankshaft, camshaft, timing components, and lubrication system.

Engine Management:

Coverage of fuel injection systems (e.g., Bosch KE-Jetronic/CIS-E), ignition system, emission control systems, and diagnostics.

Drivetrain:

Comprehensive information on automatic and manual transmissions, clutch operation, driveshafts, differentials, axle shafts, and related components.

Suspension Steering:

Detailed procedures for front and rear suspension systems (e.g., McPherson struts, multi-link rear), power steering system, steering gear, and wheel alignment.

Brakes:

In-depth coverage of hydraulic brake systems (front discs, rear discs), ABS (if equipped), parking brake system, and brake fluid specifications.

Electrical:

Extensive coverage of the vehicle's electrical system, including wiring schematics, component testing, lighting, starting and charging system, and accessory circuits.

Climate Control:

Service and repair procedures for the heating, ventilation, and air conditioning (HVAC) system, including refrigerant handling and component diagnostics.

Body Chassis:

Information on body panels, doors, windows, mirrors, interior trim, seating, and related hardware.

Maintenance:

Routine maintenance procedures, fluid changes, filter replacements, lubrication, and inspection schedules.

Diagnostics:

Step-by-step diagnostic procedures for identifying and troubleshooting common and complex issues across all vehicle systems.

Repair Rebuild:

Detailed instructions for the disassembly, repair, and reassembly of all major mechanical and electrical components.

Wiring Schematics:

Complete and detailed wiring diagrams for all electrical systems, crucial for troubleshooting and repair.

Troubleshooting Guides:

Specific troubleshooting trees and guides based on symptoms to efficiently pinpoint the cause of a problem.

Depth Level:

Factory-level, comprehensive, covering everything from basic adjustments to complete overhauls and complex electronic diagnostics.

Detail Level:

High level of detail with step-by-step instructions, torque specifications, clearances, and procedures as performed by dealership technicians.

📊 Manual Specifications

Format Type:

PDF

Searchability:

Likely text-searchable PDF, allowing for quick location of specific information.

Printability:

All pages are printable, allowing users to print specific sections or diagrams as needed.

Image Resolution:

High-resolution images and diagrams that can be enlarged for clarity.

Binding:

Digital (PDF) - no physical binding. Allows for easy digital access and printing.

Paper Type For Printing:

User selectable; printing on standard paper is supported.

Operating Systems:

Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac compatible.

Required Software:

Adobe PDF Reader and Winzip (or equivalent unzipping software).

⚙️ Engine Specifications

Engine Types Covered:

Covers various 4-cylinder and 6-cylinder gasoline and diesel engines used in the 1987 W124 models (e.g., M102 2.3L, M103 2.6L/3.0L, OM602 2.5L Diesel, OM603 3.0L Diesel).

Typical Horsepower:

Ranges from approximately 94 hp (2.0L Diesel) to 188 hp (3.0L gasoline, depending on injection/tuning).

Typical Torque:

Varies significantly by engine, but generally provides strong low-end torque, especially in diesel variants.

Fuel Injection Systems:

Detailed coverage of Bosch K-Jetronic (CIS) and KE-Jetronic (CIS-E) mechanical fuel injection systems, as well as diesel injection pumps.

Oil Type Capacity:

Specific API service classifications and viscosities (e.g., 15W-40 or 10W-30 for diesel, 10W-30 or 10W-40 for gasoline, depending on climate). Capacity typically around 5-7 liters.

Spark Plug Type:

Specific spark plug types and gap settings based on engine variant (e.g., Bosch WR 7 DC+ or equivalent).

🔧 Transmission

Available Manual:

Some models featured a 4-speed or 5-speed manual transmission. Manual transmission service and repair procedures are covered.

Available Automatic:

Most models came equipped with Mercedes-Benz's robust 4-speed automatic transmission (e.g., 722.3, 722.4). Extensive coverage of its operation, maintenance, and repair.

Automatic Transmission Modes:

Information on standard drive modes (e.g., 'E' for Economy, 'S' for Standard/Sport) and their operational differences.

Automatic Transmission Fluid Type:

Mercedes-Benz Specification 236.1 or equivalent (e.g., Dexron-III/Mercon compatible fluids are often cited, but MB spec is preferred).

Automatic Transmission Fluid Capacity:

Approximately 6-8 liters for a pan drop and filter change, more for a complete flush.

📐 Dimensions

Body Styles:

Sedan (4-door), Coupe (2-door), Convertible (2-door), Wagon (5-door T-model).

Wheelbase Sedan:

Approx. 2800 mm (110.2 inches)

Length Sedan:

Approx. 4740 mm (186.6 inches)

Width Sedan:

Approx. 1740 mm (68.5 inches)

Height Sedan:

Approx. 1430 mm (56.3 inches)

Curb Weight Range:

Approximately 1450 kg to 1750 kg depending on engine and body style.

Gross Vehicle Weight Rating:

Specific GVWR varies by model, typically around 2000-2200 kg.

Wheel Bolt Pattern:

5x112 mm

Typical Tire Sizes:

195/65R15, 205/60R15, 205/55R16 (depending on wheel option and model)

🛡️ Safety Features

Era Specific Safety Features:

Designed with advanced safety for its time, including a strong safety cell, crumple zones, and a well-engineered chassis.

Antilock Brakes ABS:

Optional on many models, providing enhanced braking control. ABS system components and diagnostics are covered.

Power Assisted Steering:

Standard power steering for improved maneuverability and driver comfort.

Airbags:

Driver airbag was an option that began appearing in the late 1980s, and its system is likely covered if equipped.

Seat Belts:

Pre-tensioner seat belts, especially for front occupants, were a feature. The manual covers their operation and service.

Rollover Protection:

Specifically for the convertible model, features to enhance occupant safety in case of a rollover are integrated.

💡 Technology Features

Audio Systems:

Factory radio/cassette systems, likely from Becker. The manual covers removal, installation, and basic troubleshooting of these units.

Cruise Control System:

Factory cruise control system operation and maintenance procedures are included.

Multiplex Can Communication:

Early forms of multiplexed wiring systems might be present for certain functions, and the manual's electrical diagrams will detail these.

Instrument Cluster:

Detailed information on the instrument cluster, including gauges, warning lights, and their associated circuits.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000-15,000 km or 6-12 months, depending on driving conditions and oil type used. Consult specific vehicle documentation.

Major Service Intervals:

Significant services usually recommended at 30,000-60,000 km intervals, involving checks of suspension, brakes, fluids, belts, and spark plugs.

Coolant Type:

Mercedes-Benz specification 325.0 coolant (ethylene glycol based), typically a 50/50 mix with distilled water. Color is usually green.

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid. Manual will specify exact MB approval.

Power Steering Fluid:

Mercedes-Benz specification 236.3 or an approved ATF (Automatic Transmission Fluid), often Dexron-II/III compatible.

Wiring Harness Degradation:

A common issue across many Mercedes-Benz models of this era is the degradation of the main engine wiring harness insulation due to age and heat, leading to electrical gremlins. The manual will detail testing and replacement.

Head Gasket Leaks:

While generally robust, head gasket issues can occur with age and high mileage. The manual provides procedures for head gasket replacement.

Overheating:

Can be caused by a failing water pump, clogged radiator, or faulty thermostat. The manual covers diagnosis and replacement of these components.

Automatic Transmission Hard Shifting:

Often related to vacuum modulator issues or fluid/filter changes. The manual offers troubleshooting for these symptoms.

📚 Vehicle History

Mercedes Benz Legacy:

Founded in 1926, Mercedes-Benz has a long-standing reputation for automotive innovation, safety, and luxury.

W124 Introduction:

The W124 chassis was introduced in 1984 as the successor to the W123 series. It marked a significant evolution in design, aerodynamics, and engineering.

W124 Key Innovations:

Known for its aerodynamic efficiency, improved multi-link rear suspension, and a wider range of engine options, including the first diesel engines with emissions controls in some markets.

W124 Production Years:

1984-1995 (with 1987 being early in its production run)

W124 Manufacturing Location:

Primarily Germany, with some production in other international facilities.