Manual Coverage
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Systems Covered
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Systems Covered:
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Maintenance, Engine (including specific components like block, head, pistons, valves, timing), Control System, Mechanical Systems, Fuel Service Specifications, Emission Control, Intake/Exhaust/Cooling Systems, Lubrication, Ignition/Starting/Charging, Automatic Transmission, Clutch, Manual Transmission, Transfer Case/Propeller Shaft, Drive Shaft, Differential, Axle/Suspension, Tire & Wheel, Brake Control, Brakes (including ABS on applicable models), Parking Brake, Steering Column, Power Steering, Air Conditioning, Supplemental Restraint System (SRS), Seat Belts, Engine Immobilizer, Cruise Control, Wiper & Washer Systems, Door Locks, Meter/Audio/Visual Systems, Horn, Windshield/Glass/Mirrors, Instrument Panel, Seats, Engine Hood/Doors, Exterior & Interior Trim, Electrical Systems, Multiplex/CAN Communication (where applicable for the era).
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Procedures Included
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Procedures Included:
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Complete step-by-step instructions for maintenance, diagnostics, service, and repair of all vehicle systems. Includes detailed procedures for engine overhauls, transmission servicing, brake system repairs, suspension work, electrical troubleshooting, and bodywork. Specific procedures for component removal, installation, adjustment, and testing.
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Technical Depth
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Technical Depth:
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Factory-level, high detail. Covers everything from basic maintenance schedules and fluid checks to advanced diagnostic procedures, component-level repair, and complete system rebuilds. Includes wiring schematics and detailed illustrations for accurate interpretation.
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Diagnostic Tools
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Diagnostic Tools Covered:
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While not listing specific tool part numbers, it implies the use of standard automotive diagnostic equipment and Mercedes-Benz specific tools for certain procedures. Fault code retrieval methods for relevant systems are included.
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Wiring Schematics
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Wiring Schematics Coverage:
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Comprehensive and detailed wiring diagrams for all electrical systems, including engine management, lighting, HVAC, power accessories, and diagnostic circuits.
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Bodywork Repair
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Bodywork Repair Procedures:
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Includes procedures for door, hood, trunk panel alignment, hinge adjustment, window regulator repair, and body trim component replacement. Also covers frame and structural repair guidelines.
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Diagnostics Troubleshooting
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Diagnostics Troubleshooting Coverage:
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Extensive coverage of common symptoms and their probable causes, fault code interpretation (where applicable), and step-by-step troubleshooting trees for electrical and mechanical issues.
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Engine Diagnostics
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Engine Diagnostics Coverage:
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Detailed diagnostics for ignition system faults, fuel system performance issues, emission control system malfunctions, and engine mechanical problems (compression testing, leak-down testing).
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Engine Specifications
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Primary Engine
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Primary Engine Options:
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Covers various petrol engines (e.g., 2.0L 4-cylinder M102, 2.6L/3.0L 6-cylinder M103) and diesel engines (e.g., 2.0L 4-cylinder OM601, 2.5L 5-cylinder OM602, 3.0L 6-cylinder OM603) offered in the 1989 model year.
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Performance
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Performance Data:
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Manual contains specific horsepower, torque, and performance figures for each engine variant offered in 1989.
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Fuel System
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Fuel System Details:
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Covers both carbureted (early models or specific markets) and fuel-injected (Bosch K-Jetronic, KE-Jetronic, EIS) systems. Details include fuel pump specifications, injector diagnostics, fuel pressure regulators, and ECU function.
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Cooling System
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Cooling System Details:
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Detailed procedures for radiator removal and installation, water pump servicing, thermostat replacement, fan clutch testing, and coolant flush/refill.
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Emission Control
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Emission Control Systems:
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Covers exhaust gas recirculation (EGR) systems, catalytic converters, oxygen sensors, and evaporative emission control (EVAP) systems, including diagnostic procedures and component testing.
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Maintenance
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Service Intervals
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Service Intervals:
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Manual provides detailed recommended service intervals for oil changes, filter replacements, fluid checks, brake inspections, and tune-ups based on mileage and time.
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Fluid Specifications
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Fluid Specifications:
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Essential fluid specifications including engine oil grades (e.g., SAE 10W-40, 15W-40 depending on climate), coolant type (e.g., MB coolant specification), brake fluid type (e.g., DOT 3/4), power steering fluid, and transmission fluid (e.g., ATF types).
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Known Issues
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Common Issues Covered:
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While not explicitly stated as 'known issues,' the manual's diagnostic sections will address common wear items and potential problems of the era, such as fuel distributor issues, vacuum hose degradation, suspension component wear, and electrical connector corrosion.
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Lubrication System
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Lubrication System Details:
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Covers engine oil capacity, oil filter part numbers, lubrication schedules, and procedures for oil pan removal/installation and oil pressure testing.
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Vehicle Specs
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Chassis Type
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Chassis Type:
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Unibody construction with integrated crumple zones.
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Suspension Front
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Front Suspension Type:
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Independent, double wishbone with coil springs and anti-roll bar.
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Suspension Rear
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Rear Suspension Type:
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Independent, multi-link independent suspension with coil springs and anti-roll bar.
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Brakes Front
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Front Brake Type:
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Ventilated discs (standard), potentially solid discs on base models. ABS optional/standard depending on trim.
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Brakes Rear
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Rear Brake Type:
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Solid discs.
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Steering Type
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Steering Type:
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Recirculating ball with optional power assist.
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Wheelbase
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Wheelbase:
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Varies by body style (sedan, coupe, estate), typically around 2800 mm (110.2 inches).
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Wheel Bolt Pattern
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Wheel Bolt Pattern:
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Typically 5x112mm.
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Tire Sizes
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Tire Sizes:
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Various sizes depending on model and wheel option, commonly 195/65R15, 205/60R15, or 205/55R16.
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