🏷️ Basic Information Identification Make: Mercedes-Benz Model: W124 Sedan, Coupe, and Wagon Codes Chassis Code: W124 👋 Introduction Market Position Segment: Luxury Executive Sedan/Coupe/Wagon Historical Significance: The W124 chassis is renowned for its engineering robustness, build quality, and driving refinement, making it a benchmark in its class. Competitive Analysis Key Competitors: BMW E30/E34, Audi 100/200, Lexus LS400 (later models). Key Features Engineering Philosophy: Over-engineered and built to last, emphasizing durability, safety, and comfort. Design Elements: Aerodynamic styling, excellent build quality, and sophisticated interior appointments. 📋 Manual Details Coverage Areas Engine Overhaul And Rebuilding: Comprehensive procedures for engine disassembly, inspection, repair, and reassembly. Brakes: Detailed service procedures for hydraulic systems, calipers, rotors, pads, ABS components, and parking brake. Sunroof: Repair and adjustment procedures for the power sunroof mechanism. Timing Belt Replacement: Step-by-step instructions for timing belt removal and installation, including critical alignment procedures. Trouble Codes: Diagnostic Trouble Codes (DTCs) and their corresponding symptoms and troubleshooting steps for various ECUs. Wiring Diagrams: Complete and detailed wiring schematics for all electrical systems. Troubleshooting And Diagnostics: Systematic diagnostic procedures to identify and resolve faults. Engine Performance: Analysis and adjustment of engine performance parameters. Front End Procedures And Specifications: Information on steering, suspension alignment, and front axle components. Suspension: Service and repair procedures for front and rear suspension systems, including shock absorbers and springs. Transmission Information: Detailed coverage of both manual and automatic transmission service, repair, and overhaul. Air Conditioning Service And Capacities: Refrigerant handling, component service, and system capacities for the A/C system. Computer Diagnostic Codes: Specific diagnostic codes related to the Engine Control Unit (ECU) and other onboard computers. Firing Orders: Correct firing order for each engine variant. Detailed Specifications Covered: Extensive technical specifications for all major components and systems. Factory Maintenance Schedules And Charts: Recommended preventative maintenance schedules as per Mercedes-Benz factory guidelines. Serpentine Belt Routings With Diagrams: Visual diagrams and descriptions for serpentine belt installation and routing. Timing Belt Service Procedures: Detailed steps for timing belt maintenance, tensioner replacement, and associated components. Driving Concerns: Troubleshooting common driving-related issues. Complete Torque Specifications: Precise torque values for all fasteners across all systems. U-Joint And Cv-Joint Service Procedures: Service and replacement guidelines for universal joints and constant velocity joints. Repair Procedures: Detailed, step-by-step repair instructions for all vehicle systems. Complete Wiring Diagrams: Comprehensive electrical schematics illustrating all circuits. Hundreds Of Illustrations: Numerous diagrams, schematics, and photographs to aid in understanding. Page Count Total Pages: >5000 Manual Type Type: Service and Repair Manual Target Audience: Professional Mechanics and DIY Enthusiasts Language Language: English Format Delivery Format: Downloadable PDF Compatibility: Works on all computers (PC & MAC) 📖 Manual Coverage Systems Covered Engine Management: Fuel injection systems (CIS-E, KE-Jetronic, HFM), ignition systems, emission control systems. Powertrain: Engine mechanicals, cylinder head, crankshaft, pistons, connecting rods, camshafts, timing gears/chains, automatic transmission (4-speed 722.3/.4, 5-speed 722.5), manual transmission (Getrag 4-speed, 5-speed). Chassis And Body: Frame, body panels, doors, hinges, locks, glass, sunroof, seats, interior trim, exterior trim, bumpers, paint and corrosion protection. Electrical Systems: Starter, alternator, battery, lighting, gauges, warning lamps, wipers, washers, horn, central locking, power windows, power seats, climate control, diagnostic connectors. Cooling System: Radiator, fan, water pump, thermostat, hoses, coolant specifications. Fuel System: Fuel tank, fuel pump, fuel filter, fuel lines, fuel injectors, fuel pressure regulator. Exhaust System: Exhaust manifold, catalytic converter, mufflers, pipes, gaskets. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement, battery maintenance. Diagnostic Troubleshooting: Systematic approaches to identifying the root cause of malfunctions using symptom charts and diagnostic codes. Engine Repair: Head gasket replacement, piston ring replacement, valve adjustments, bearing replacement, crankshaft seal replacement, oil pump service. Transmission Repair: Fluid and filter changes, seal replacement, valve body service, torque converter replacement, complete transmission overhaul. Brake System Repair: Brake pad and rotor replacement, caliper overhaul, brake line replacement, bleeding the brake system, ABS module diagnosis and replacement. Suspension And Steering Repair: Ball joint replacement, tie rod end replacement, control arm bushing replacement, power steering pump and rack service, wheel bearing replacement. Electrical Troubleshooting And Repair: Tracing circuits, diagnosing electrical faults, component replacement, wiring harness repair. Climate Control Service: Refrigerant evacuation and recharge, compressor replacement, condenser and evaporator service, blower motor replacement. Technical Depth Depth: Professional Grade - Covers everything from routine maintenance to full engine and transmission rebuilds. Diagnostic Capabilities: Detailed diagnostic trees and fault code interpretations enabling complex problem-solving. Specific Procedures: Provides specific procedures for specialized tasks like valve seating angle adjustments and fuel injector flow testing. 📊 Manual Specifications File Format Primary Format: PDF Searchability: Likely text-searchable due to digital format, allowing quick access to specific information. Print Quality Printability: Designed for printing individual pages, ensuring clarity and detail without damaging original pages. Binding Type Digital Binding: N/A (Digital Download) Paper Type Digital Paper Equivalent: High-resolution digital pages suitable for clear...
4MATIC system available on select 300E and 300TE models.
Features
Transmission Fluid:
MB Specification 236.1 for 722.3, MB Specification 236.6 for 722.5.
📐 Dimensions
Exterior
Wheelbase:
Sedan: 2797 mm (110.1 in); Coupe: 2760 mm (108.7 in); Wagon: 2815 mm (110.8 in)
Weights
Curb Weight:
Varies by model and equipment, typically 1450-1650 kg (3197-3638 lbs).
🛡️ Safety Features
Ratings
Crash Test Performance:
The W124 chassis was designed with advanced safety features for its era, including a very strong safety cage and energy-absorbing crumple zones, contributing to excellent passive safety.
Active Features
Anti-Lock Brakes:
Standard on most models by the end of the production run, optional in earlier years.
Passive Features
Airbags:
Driver's side airbag became widely available and standard towards the latter half of the W124 production, especially from 1989 onwards. Passenger airbags were a later option. Seatbelt pre-tensioners.
Insulation on engine wiring harnesses can become brittle and degrade over time, leading to electrical issues.
Window Regulator Failure:
Plastic components in the window regulator mechanisms can fail.
Sender Unit Failure:
Fuel level sender and coolant temperature sender units are common wear items.
O-Ring Leaks:
Oil cooler seals and other engine o-rings can develop leaks.
📚 Vehicle History
Brand Heritage
Mercedes Benz Legacy:
Continued Mercedes-Benz's reputation for quality, durability, and engineering excellence.
Model Evolution
Generation Details:
Introduced in 1984 (as the W123 successor) and produced until 1995. The 1986-1993 range covers the core of its most popular variants.
Production
Manufacturing Locations:
Primarily Germany, with some assembly in other international locations.
🏆 Awards & Recognition
Recognitions
Automotive Journals:
Consistently praised by automotive publications for its build quality, comfort, and durability, often appearing on 'best of' lists for long-term ownership.
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