1979-1992 Mercedes W126 SEC Service and Repair Manual

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🏷️ Basic Information Identification Make: Mercedes-Benz Model: W126 SEC Model Code: W126 Body Style: Coupe (C126) Generation Generation Code: 1st Generation Codes Chassis Code: C126 👋 Introduction Market Position Target...

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Taper: Car

Distributeur:

UGS: 511766

Mots clés: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 Car Cars Mercedes W126 W126 SEC

Variantes de produits

Description

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

W126 SEC

Model Code:

Body Style:

Coupe (C126)

Generation

Generation Code:

1st Generation

Codes

Chassis Code:

👋 Introduction

Market Position

Target Audience:

Mercedes-Benz W126 SEC owners, independent repair shops, DIY enthusiasts

Competitive Analysis

Advantage:

Vehicle-specific, factory-authorized content, comprehensive A-Z coverage

Key Features

Convenience:

All-in-one PDF, printable pages, no greasy pages

Information Richness:

Step-by-step instructions, diagrams, illustrations, wiring schematics, specifications

📋 Manual Details

Coverage Areas

Years Covered:

1979-1992

Models Covered:

All W126 SEC models

Page Count

Page Count Estimate:

Extensive (exact count not provided, but described as comprehensive A-Z)

Manual Type

Manual Type:

Service and Repair Manual

Language

Language:

English

Format

Format:

Delivery Method:

Speed Download

📖 Manual Coverage

Systems Covered

Engine:

Yes, comprehensive engine service, diagnostics, and repair

Control System:

Yes, detailed coverage

Mechanical:

Yes, extensive mechanical procedures

Fuel System:

Yes, including service specifications

Emission Control:

Cooling System:

Lubrication System:

Ignition System:

Starting Charging:

Automatic Transmission:

Manual Transmission:

Clutch:

Drivetrain:

Yes, including transfer, propeller shaft, drive shaft, differential, axle

Suspension:

Wheels Tires:

Brake System:

Yes, including control and parking brake

Steering System:

Yes, including column and power steering

Climate Control:

Yes, including Air Conditioning

Restraint Systems:

Yes, including Supplemental Restraint System (SRS) and Seat Belts

Security Systems:

Yes, including Engine Immobilizer

Cruise Control:

Wipers Washers:

Door Locks:

Interior Electronics:

Yes, including Meter, Audio/Visual, Horn, Instrument Panel

Glass Mirrors:

Yes, including Windshield/Glass Mirror

Body:

Yes, including Engine Hood/Door, Exterior & Interior

Electrical System:

Yes, comprehensive electrical schematics

Multiplex Communication:

Yes, including CAN Communication (if applicable to later models in the range)

Procedures Included

Maintenance:

Yes, routine maintenance procedures

Diagnostics:

Yes, troubleshooting and diagnostic steps

Repair:

Yes, step-by-step repair instructions for all systems

Troubleshooting:

Yes, detailed troubleshooting guides

Wiring Schematics:

Yes, comprehensive wiring diagrams included

Technical Depth

Depth:

Vehicle Specific - Factory Detailed

Accuracy:

Exact same manual used by dealership technicians

📊 Manual Specifications

File Format

File Type:

Compatibility:

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

Requirements:

Adobe PDF Reader, Winzip (free online)

Print Quality

Printability:

Yes, all pages printable

Image Scaling:

Yes, ability to blow up images for enlarged copies

Binding Type

Binding Type:

Digital (PDF) - no physical binding

Paper Type

Paper Type:

N/A (Digital File)

⚙️ Engine Specifications

Primary Engine

Engine Family:

Mercedes-Benz M116/M117 V8 (various displacements)

Engine Configuration:

Fuel System:

Bosch K-Jetronic (CIS) Fuel Injection (likely for most models in this range)

Performance

Typical Displacement:

3.8L, 4.2L, 5.0L, 5.6L (depending on specific SEC model)

Horsepower Range:

Approx. 180-270 hp (varies by engine and year)

Torque Range:

Approx. 220-320 lb-ft (varies by engine and year)

🔧 Transmission

Standard

Transmission Type:

4-speed Automatic (e.g., 4G-TRONIC)

Optional

Manual Transmission Availability:

Extremely rare or not offered on SEC models

Features

Automatic Features:

Selectable modes (e.g., Comfort/Sport) on some later models

📐 Dimensions

Exterior

Body Style:

2-door Coupe (C126)

Wheelbase:

2896 mm (114.0 inches)

Length:

4960 mm (195.3 inches)

Width:

1800 mm (70.9 inches)

Height:

1380 mm (54.3 inches)

Weights

Curb Weight Range:

Approx. 1750-1900 kg (3858-4189 lbs)

🛡️ Safety Features

Ratings

Safety Ratings Era:

Modern safety standards for its time, including robust body structure

Passive Features

Airbags:

Driver airbag became standard later in the production run

Seat Belts:

3-point inertia-reel seat belts

Crumple Zones:

Yes, front and rear crumple zones

Active Features

Anti-lock Braking System (ABS) available/standard on later models

💡 Technology Features

Infotainment

Audio System:

Factory radio/cassette player, often with premium sound options

Instrumentation:

Classic analog gauges, trip computer on some models

Driver Assistance

Cruise Control:

Standard or optional depending on model year

Connectivity

Connectivity Features:

Limited by era; no modern Bluetooth or USB integration

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically every 5,000-10,000 miles or annually, depending on usage and oil type.

Major Service Interval:

Varies, but comprehensive checks at 30,000, 60,000, etc., often including spark plugs, filters, and fluid flushes.

Fluid Specifications

Engine Oil:

API SG or higher, viscosity typically 10W-40 or 15W-40 (refer to manual for specific year/engine)

Transmission Fluid:

MB 236.1 (ATF Dexron II)

Coolant:

Mercedes-Benz G48 (Blue) or equivalent Ethylene Glycol based antifreeze

Known Issues

Common Wear Items:

Fuel pressure regulator, vacuum lines, blower motor resistor, window regulators, ignition components

Wiring Harnesses:

Insulation degradation on older wiring harnesses can lead to electrical issues

K Jetronic:

K-Jetronic system can require meticulous tuning and maintenance for optimal performance

📚 Vehicle History

Brand Heritage

Brand Legacy:

Mercedes-Benz renowned for engineering, luxury, and durability

Model Evolution

W126 Introduction:

The W126 chassis (S-Class sedan) was introduced in 1979, with the C126 SEC coupe variant following shortly after.

Sec Positioning:

The SEC represented the pinnacle of Mercedes-Benz coupe design and engineering, offering luxurious and powerful grand touring capabilities.

Production

Production Period:

1981-1991 (for C126 SEC)

Manufacturing Location:

Germany

🏆 Awards & Recognition

Recognitions

Design Awards:

The W126 SEC is widely recognized for its timeless and elegant design, often cited as a design benchmark of its era.

Ratings

Reliability Reputation:

Generally high reliability when properly maintained, known for robust engineering.