1991 Mercedes-Benz 300TE Service & Repair Manual Software

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🏷️ Basic Information Identification Make: Mercedes-Benz Model: 300TE Year: 1991 Body Style: Estate/Station Wagon Chassis Code: S124 👋 Introduction Market Position Segment: Mid-size Luxury Estate Car Competitive Analysis Key Competitors:...

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UGS: 331600

Mots clés: 1991 300TE Car Cars Mercedes Mercedes-benz Misc

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Description

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

300TE

Year:

Body Style:

Estate/Station Wagon

Chassis Code:

👋 Introduction

Market Position

Segment:

Mid-size Luxury Estate Car

Competitive Analysis

Key Competitors:

BMW 5 Series Touring (E34), Audi 100 Avant (C3/C4), Volvo 740/940 Estate

Key Features

Brand Reputation:

Reputation for build quality, durability, safety, and engineering excellence synonymous with Mercedes-Benz.

Vehicle Attributes:

Spacious interior, comfortable ride, robust build, capable performance, and excellent cargo capacity.

Manual Value Proposition

Benefit To Owner:

Enables owners to perform accurate diagnostics, maintenance, and repairs, saving on dealership costs and ensuring proper upkeep of a classic luxury vehicle.

📋 Manual Details

Coverage Areas

Engine:

M103 (3.0L Inline-6)

Transmission:

4-speed Automatic (722.4)

Drivetrain:

Rear-Wheel Drive (RWD)

Major Systems:

Engine, Fuel System, Ignition System, Exhaust System, Cooling System, Lubrication System, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, Climate Control, Body, Interior

Page Count

Estimated Pages:

1000+

Manual Type

Type:

Official Service and Repair Manual

Language

Language:

English

Format

Format:

Software (likely PDF or proprietary executable)

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Detailed disassembly, inspection, and reassembly of all engine components (cylinder head, block, pistons, crankshaft, camshafts, valves).

Fuel System:

Bosch KE-Jetronic fuel injection system diagnosis, repair, component testing (fuel distributor, injectors, fuel pump, pressure regulator).

Ignition System:

Diagnosis and repair of ignition coil, distributor, spark plug wires, and related components.

Transmission Overhaul:

Complete overhaul procedures for the 722.4 4-speed automatic transmission, including torque converter, valve body, clutch packs, and planetary gears.

Suspension And Steering:

Front and rear suspension component replacement (struts, control arms, ball joints, bushings), steering gearbox diagnosis and repair, power steering system.

Brake System:

Disc brake system diagnosis, repair, fluid replacement, ABS (Anti-lock Braking System) components and troubleshooting.

Electrical Diagnostics:

Comprehensive wiring diagrams, component testing, fuse and relay identification, troubleshooting for common electrical faults.

Climate Control:

Air conditioning system diagnosis and repair, heater core replacement, climate control module troubleshooting.

Body And Interior:

Body panel repair, door mechanism adjustment, seat removal and installation, trim panel replacement.

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, spark plug replacement, coolant flush, brake fluid flush, belt inspections and replacement.

Troubleshooting:

Systematic diagnostic procedures for identifying and resolving common and uncommon vehicle problems.

Component Replacement:

Detailed step-by-step instructions for replacing virtually every serviceable component on the vehicle.

Rebuilding Procedures:

Comprehensive guides for rebuilding major components like the engine and transmission.

Specifications And Tolerances:

Precise technical specifications, torque values, and clearances required for various repair procedures.

Technical Depth

Depth:

Complete factory-level diagnostic and repair information, suitable for professional technicians and advanced DIY enthusiasts.

📊 Manual Specifications

File Format

File Type:

Software (digital delivery)

Print Quality

Image Resolution:

High-resolution diagrams and images for clarity.

Binding Type

Binding:

N/A (Digital Software)

Paper Type

Paper Quality:

N/A (Digital Software)

⚙️ Engine Specifications

Primary Engine

Engine Code:

M103.980

Displacement:

2960 cc (3.0 Liters)

Configuration:

Inline 6-Cylinder, SOHC

Performance

Horsepower:

180 hp @ 5700 rpm (approx.)

Torque:

188 lb-ft @ 4400 rpm (approx.)

Fuel System

Injection Type:

Bosch KE-Jetronic Electronic Fuel Injection with Air Flow Metering

Recommended Octane:

91 (or higher)

Ignition System

System:

Electronic Ignition with Distributor

Cooling System

Type:

Liquid-Cooled

Lubrication System

Oil Capacity:

7.5 Liters (approx.)

Engine Management

ECU Type:

Digital Engine Control Unit (ECU) for fuel and ignition

🔧 Transmission

Standard

Type:

4-speed Automatic

Transmission Code:

722.4

Optional

Type:

5-speed Manual (less common in US market for 300TE)

Features

Fluid Type:

MB 236.7 Specification Automatic Transmission Fluid (e.g., Shell ATF 3403-M115 or equivalent)

Fluid Capacity:

Approximately 7-8 Liters (depending on torque converter fill)

📐 Dimensions

Exterior

Length:

4765 mm (approx.)

Width:

1798 mm (approx.)

Height:

1490 mm (approx.)

Wheelbase:

2800 mm (approx.)

Cargo

Cargo Volume Seats Up:

1650 Liters (with rear seats folded)

Weights

Curb Weight:

1600-1700 kg (approx.)

Gross Vehicle Weight Rating:

2300 kg (approx.)

Towing Capacity:

1500 kg (approx., braked trailer)

🛡️ Safety Features

Ratings

Crash Test History:

While specific official crash test ratings for this exact year/model variant from modern agencies may be limited, the S124 chassis was known for its robust safety cage and impact absorption structures.

Active Features

Standard Anti-lock Braking System (ABS)

Passive Features

Airbags:

Driver's airbag standard on later models and often retrofitted. Passenger airbag was optional.

Seatbelts:

Front and rear seat belts, with front seat belt height adjustment and pretensioners.

Body Structure:

Reinforced safety cage, crumple zones, side impact protection.

💡 Technology Features

Infotainment

Audio System:

Factory premium sound system, often with cassette player. Options for CD changers existed.

Climate Control System:

Automatic Climate Control (ACC) was a common option, offering precise temperature regulation.

Driver Assistance

Cruise Control:

Standard cruise control

Traction Control:

ASR (Anti-Slip Regulation) was available as an option on some models.

Connectivity

Original Features:

Limited by era; primarily focused on vehicle function rather than external connectivity. Optional telephone preparation might have been available.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 10,000-15,000 km or annually, whichever comes first (using synthetic oil).

Transmission Fluid Change:

Every 50,000-60,000 km or as recommended by the manual.

Spark Plug Replacement:

Every 40,000-60,000 km (depending on plug type).

Coolant Flush:

Every 2-3 years or 50,000 km.

Fluid Specifications

Engine Oil Specification:

API SG/SH or ACEA A2/A3, SAE 5W-40 or 10W-40 synthetic oil recommended.

Brake Fluid Specification:

DOT 4

Power Steering Fluid:

MB 236.3 Specification hydraulic fluid (e.g., Pentosin CHF 11S or equivalent)

Coolant Specification:

Glycol-based antifreeze (e.g., MB 325.0 or 326.0 specification)

Known Issues

Wiring Harness:

Degradation of insulation on original wiring harnesses, particularly in the engine bay, leading to electrical issues.

Head Gasket:

While generally robust, potential for head gasket failure with age and mileage, especially if overheated.

Fuel Distributor:

KE-Jetronic fuel distributor can become contaminated or fail, affecting fuel delivery.

Window Regulators:

Electric window regulators can be a common point of failure.

Rust:

Common rust points include wheel arches, sills, and tailgate area, especially in regions with road salt.

📚 Vehicle History

Brand Heritage

Brand Focus:

Mercedes-Benz has a long-standing reputation for engineering, luxury, and safety, established over decades of automotive innovation.

Model Evolution

Predecessor:

W123 Estate (S123)

Successor:

W210 E-Class Estate (S210)

Chassis Generation:

S124 (second generation of the E-Class Estate)

Production

Production Years:

1985-1995

Manufacturing Location:

Sindelfingen, Germany

🏆 Awards & Recognition

Recognitions

Industry Accolades:

The W124 generation, including the 300TE, consistently received praise from automotive journalists for its build quality, comfort, and engineering. Often cited as one of the most over-engineered cars of its era.

Ratings

Reliability Perception:

While requiring diligent maintenance, the M103 engine and W124 chassis are renowned for their long-term durability when properly cared for.