1982 Mercedes W126 SEL Service and Repair Manual

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🏷️ Basic Information Identification Make: Mercedes-Benz Model: W126 SEL Year: 1982 Codes Chassis Code: W126 Body Style Code: SEL (Sonderlenkachse - Special Axle, indicating long wheelbase) 👋 Introduction Market Position...

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类型: Car

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标签: 1982 Car Cars Mercedes W126 W126 SEL

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Description

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

W126 SEL

Year:

Codes

Chassis Code:

Body Style Code:

SEL (Sonderlenkachse - Special Axle, indicating long wheelbase)

👋 Introduction

Market Position

Target Audience:

Mercedes-Benz W126 SEL owners, independent repair shops, automotive enthusiasts

Vehicle Segment:

Full-size Luxury Sedan

Competitive Analysis

Value Proposition:

Provides dealership-level diagnostic and repair information, enabling DIY maintenance and reducing reliance on expensive professional services.

Key Features

Unique Selling Points:

Vehicle-specific, step-by-step instructions, detailed diagrams and schematics, comprehensive A-Z coverage, digital format for ease of use and preservation.

📋 Manual Details

Coverage Areas

Primary Coverage:

Complete Service and Repair

Model Variants Covered:

All W126 SEL models for 1982

Scope:

A-Z (from basic maintenance to complex repairs), covering all aspects of the vehicle's mechanical and electrical systems.

Page Count

Estimated Page Count:

Extensive (typically 1000+ pages for comprehensive factory manuals)

Manual Type

Type:

Factory Service and Repair Manual

Language

Language:

English

Format

Format:

Digital Features:

Searchable, Printable, Zoomable Images

Digital Distribution:

Delivered as a downloadable file for immediate access.

📖 Manual Coverage

Systems Covered

Powertrain:

Engine overhaul, fuel system, ignition, cooling, lubrication, emissions control, exhaust systems

Drivetrain:

Automatic transmission service and repair, driveshafts, differential, axle shafts

Chassis:

Suspension (front and rear), steering system (including power steering), brakes (hydraulic, parking brake), wheels and tires

Electrical:

Complete wiring schematics, starting and charging system, lighting, instruments, accessories, fuse/relay identification, diagnostic procedures

Body And Interior:

Body panels, doors, windows, mirrors, seats, interior trim, climate control (HVAC), supplemental restraint systems (SRS - if applicable to '82 model, though likely limited or absent), seat belts

Interior Comfort:

Air conditioning, heating, ventilation, power accessories (windows, locks, seats, sunroof), seat belts, and supplemental restraint systems (where applicable, though unlikely for '82).

Body And Trim:

Exterior body panel alignment and repair, door mechanisms, glass replacement, seals, interior trim panel removal and installation.

Procedures Included

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, lubrication points

Diagnostics:

Troubleshooting guides, diagnostic codes (if applicable), symptom-based diagnosis

Repair:

Component removal, installation, adjustment, and overhaul for all major systems

Technical Specifications:

Torque values, clearances, fluid types and capacities, electrical resistance, performance data

Troubleshooting:

Systematic approaches to diagnosing problems in all covered systems, including electrical faults, engine performance issues, and climate control malfunctions.

Component Replacement:

Detailed instructions for removing and installing virtually every component of the vehicle, from minor sensors to major drivetrain assemblies.

Technical Depth

Depth:

Comprehensive: Covers everything from routine maintenance to full engine and transmission rebuilds, including detailed electrical system diagnostics and repair.

📊 Manual Specifications

File Format

Type:

Searchability:

Text within the PDF is searchable, allowing quick access to specific topics or part numbers.

Print Quality

Feature:

All pages are printable for on-site use; images can be enlarged for detail.

Binding Type

Physical Format:

N/A (Digital PDF)

Paper Type

Digital Storage:

Stored on PC, reducing wear and tear compared to physical manuals.

Compatibility

Operating Systems:

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

Requirements

Software:

Adobe PDF Reader, Winzip (free online)

⚙️ Engine Specifications

Primary Engine

Engine Code Typical:

M116 (for 3.8L V8) or M117 (for 5.0L V8, common in SEL models of this era)

Engine Code Typical

Engine Configuration:

V8 SOHC (Single Overhead Camshaft)

Performance

Displacement Liters:

Typically 5.0 Liters (for SEL, corresponding to 500SEL) or 3.8 Liters (for 380SEL)

Horsepower Approximate:

Approximately 177-230 hp depending on engine size and market specifications

Torque Approximate:

Approximately 240-320 lb-ft depending on engine size and market specifications

Fuel System

Injection Type:

Bosch K-Jetronic (CIS - Continuous Injection System) mechanical fuel injection

Fuel Type:

Unleaded Gasoline

Components:

Fuel distributor, air flow meter, warm-up regulator, fuel injectors, cold start valve.

🔧 Transmission

Standard

Type:

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

Optional

Availability:

N/A (Automatic was standard for SEL)

Features

Shift Modes:

Typically two shift modes: 'E' (Economy) and 'S' (Standard or Sport)

📐 Dimensions

Exterior

Wheelbase Mm:

Approximately 3080 mm (121.3 inches) for the long-wheelbase SEL model

Overall Length Mm:

Approximately 5150 mm (202.8 inches) for the long-wheelbase SEL model

Weights

Curb Weight Kg Approx:

Approximately 1700-1800 kg (3750-3970 lbs) depending on engine and equipment

🛡️ Safety Features

Ratings

Crash Test Era Compliance:

Designed to meet safety standards of its era; ABS became widely available towards the end of the W126 generation.

Active Features

ABS Availability:

Optional, depending on specific production date and market. Not standard on all 1982 models.

Passive Features

Airbags:

Not available on 1982 models. Driver airbag introduced later in the W126 generation.

Seat Belts:

Standard front and rear seat belts; pre-tensioners may have been optional or introduced later.

💡 Technology Features

Infotainment

Audio System:

Factory AM/FM cassette player, often with optional amplifier and advanced speaker systems for the era.

Driver Assistance

Cruise Control:

Standard feature on SEL models, utilizing vacuum or electronic actuation.

Connectivity

Multiplex Can Communication:

N/A. Vehicle architecture predates CAN bus systems. Communication is primarily via dedicated wiring harnesses and analog/digital signals.

🔧 Maintenance

Service Intervals

Oil Change Miles:

Typically every 7,500 to 10,000 miles or annually (refer to manual for exact specifications).

Major Service Miles:

Major services often recommended at 30,000, 60,000, and 100,000-mile intervals, including spark plugs, fuel filter, air filter, and transmission service.

Fluid Specifications

Engine Oil Type:

API SG or higher, SAE 10W-40 or 15W-50 often recommended, depending on climate (e.g., Mobil 1 15W-50 was a popular choice for these engines).

Coolant Type:

Ethylene glycol-based antifreeze (e.g., Mercedes-Benz PN 000 989 08 25 or equivalent) mixed 50/50 with distilled water.

Transmission Fluid Type:

Dexron II or equivalent automatic transmission fluid (ATF).

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid.

Known Issues

Fuel System:

Aging fuel lines and K-Jetronic components can lead to leaks or performance issues. Warm-up regulator issues.

Suspension:

Worn ball joints, control arm bushings, and self-leveling suspension components (if equipped, though less common on early models) can cause ride quality issues.

Electrical:

Aging wiring harnesses (especially insulation breakdown), vacuum hose degradation, and faulty climate control head units are common.

Climate Control:

HVAC blower motor issues, vacuum leaks in the control system, and refrigerant leaks.

Engine:

Oil leaks from the timing cover or valve cover gaskets, piston ring wear leading to oil consumption.

Brakes:

Routinely check brake fluid level and condition, caliper condition, and rotor wear. Early ABS systems, if present, require specialized diagnostics.

📚 Vehicle History

Brand Heritage

Manufacturer:

Mercedes-Benz, renowned for engineering excellence and luxury vehicles.

Model Evolution

W126 Generation Introduction:

The W126 S-Class generation was introduced in late 1979 for the 1980 model year, replacing the W116. The SEL represents the long-wheelbase variant.

Production

Production Period:

W126 generation produced from 1979 to 1991.

Manufacturing Location:

Germany (primarily Sindelfingen plant)

🏆 Awards & Recognition

Recognitions

Industry Standing:

The W126 generation was widely acclaimed for its safety, comfort, build quality, and technological advancements, often setting benchmarks for luxury sedans of its time.