MB w123 280E master Service Repair Manual

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Basic Information Identification Make: Mercedes-Benz Model: W123 280E Codes Chassis Code: W123 Engine Code: M110 Introduction Market Position Segment: Executive/Luxury Mid-size Sedan and Coupe (depending on body style of the...

Tipo: Cars

Fabricante:

Sku: 139331

Tag: 200 Mercedes

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Description

Basic Information
Identification
Make:	Mercedes-Benz
Model:	W123 280E
Codes
Chassis Code:	W123
Engine Code:	M110

Introduction
Market Position
Segment:	Executive/Luxury Mid-size Sedan and Coupe (depending on body style of the 280E variant).
Target Audience:	Owners, independent repair shops, and enthusiasts seeking in-depth knowledge for maintenance and repair of the W123 280E.
Competitive Analysis
Competitors:	BMW 5 Series (E28), Audi 100/200, Volvo 240/740, Jaguar XJ.
Key Features
Durability:	Renowned for robust build quality and longevity, making a comprehensive service manual essential for continued operation.
Engineering:	Represents Mercedes-Benz's commitment to over-engineered, reliable vehicles with advanced (for the era) technology.

Manual Details
Coverage Areas
Coverage:	Comprehensive mechanical, electrical, and bodywork repairs for the Mercedes-Benz W123 280E.
Page Count
Page Count:	Extensive (exact count not specified, but indicated as 'complete' and 'master')
Manual Type
Manual Type:	Master Service and Repair Manual
Language
Language:	English (typical for such manuals, assuming based on common market)
Format
Format:	Digital (likely PDF) or Printed

Manual Coverage
Systems Covered
Engine Mechanical:	Engine assembly, cylinder head, crankshaft, pistons, connecting rods, valve train, timing chain, lubrication system, cooling system, fuel injection system (Bosch K-Jetronic), exhaust system.
Engine Electrical:	Ignition system, starter system, charging system (alternator), fuel pump, fuel injectors, engine control unit (ECU) diagnostics, wiring diagrams.
Transmission:	Automatic transmission (e.g., 4-speed 722.1), manual transmission (if applicable), clutch system (manual), gear selection, torque converter, transmission fluid system, valve body.
Drivetrain:	Rear axle, differential, drive shafts, universal joints, wheel bearings.
Suspension:	Front suspension (e.g., double wishbone), rear suspension (e.g., multi-link), shock absorbers, springs, control arms, bushings, steering knuckles.
Steering:	Power steering system, steering column, steering gearbox, tie rods, steering linkage.
Brakes:	Front and rear disc brakes, hydraulic system, brake calipers, brake pads, brake rotors, brake master cylinder, brake booster, parking brake system.
Electrical System:	Battery, starter, alternator, lighting system (headlights, taillights, interior lights), fuses, relays, wiring harnesses, dashboard instruments, horn, wipers, washers.
HVAC:	Heating, ventilation, and air conditioning (HVAC) system, blower motor, heater core, A/C compressor, refrigerant system, climate controls.
Bodywork:	Body panels, doors, hood, trunk, bumpers, glass, seals, interior trim, rust prevention, body repair techniques.
Procedures Included
Maintenance:	Oil changes, filter replacements (oil, fuel, air), spark plug replacement, coolant flushes, brake fluid changes, transmission fluid changes, differential fluid changes, lubrication points.
Troubleshooting:	Diagnostic procedures for common engine, transmission, electrical, and HVAC issues. Fault code interpretation (if applicable).
Repair:	Step-by-step repair instructions for all major mechanical and electrical components, including engine rebuilds, transmission overhauls, brake system repairs, suspension component replacement.
Installation:	Instructions for replacing or installing components like alternators, starters, fuel pumps, brake calipers, shock absorbers.
Adjustments:	Carburetor adjustment (if applicable to variants), valve adjustments, ignition timing adjustments, idle speed adjustments.
Technical Depth
Depth:	Expert level, covering everything from basic preventive maintenance to full engine and transmission overhauls, including detailed diagnostic procedures and electrical system troubleshooting.

Manual Specifications
File Format
File Format:	Likely PDF with searchable text and high-resolution diagrams. If printed, expect professional binding.
Print Quality
Print Quality:	High quality with clear diagrams, schematics, and illustrations. (Assumed for a 'master' manual).
Binding Type
Binding Type:	If printed, likely a durable wire-o or perfect binding for frequent use.
Paper Type
Paper Type:	If printed, likely high-quality, thick paper to withstand shop environments.

Engine Specifications
Primary Engine
Engine Type:	Inline-six, naturally aspirated gasoline engine.
Displacement:	2.8 Liters (2799 cc).
Bore X Stroke:	86.5 mm x 80.25 mm (typical for M110).
Compression Ratio:	Typically 8.0:1 or 9.0:1 depending on market and specific variant.
Performance
Horsepower:	Approximately 145-160 PS (143-158 hp) depending on specific engine variant and market regulations (e.g., DIN vs. SAE).
Torque:	Approximately 230-235 Nm (170-173 lb-ft) depending on specific engine variant.
Fuel System
Fuel Delivery:	Bosch K-Jetronic mechanical fuel injection.
Fuel Type:	Unleaded gasoline (Premium Octane recommended).
Fuel Pump Type:	Mechanical, often a multi-cylinder diaphragm pump.

Transmission
Standard
Transmission Type:	4-speed automatic transmission (e.g., Mercedes-Benz 722.1).
Optional
Transmission Type:	4-speed or 5-speed manual transmission (availability varied by market and specific model year).
Features
Automatic Features:	Hydraulic torque converter, planetary gear sets, hydraulic valve body for gear selection.

Dimensions
Exterior
Length:	Approx. 4725 mm (186.0 in) for Sedan.
Width:	Approx. 1786 mm (70.3 in).
Height:	Approx. 1427 mm (56.2 in) for Sedan.
Wheelbase:	Approx. 2795 mm (110.0 in).
Weights
Curb Weight:	Approx. 1450-1550 kg (3197-3417 lbs) depending on body style and equipment.

Safety Features
Ratings
Crash Test Performance:	While specific official ratings from modern agencies are rare for this era, the W123 was known for its robust safety cage, crumple zones, and strong chassis structure, earning a reputation for durability and occupant protection.
Active Features
Braking System:	Four-wheel disc brakes, often with front vented discs. Anti-lock braking system (ABS) was an optional feature on later models or specific variants.
Passive Features
Airbags:	Driver's airbag became available as an option on later W123 models, but was not standard on most 280E variants.
Seat Belts:	Standard 3-point seat belts in the front and rear.
Structure:	Reinforced passenger cell, crumple zones front and rear, impact-absorbing steering column.

Technology Features
Infotainment
Audio System:	Factory fitted AM/FM radio with cassette player. High-end units could include multiple speakers and graphic equalizers.
Driver Assistance
Cruise Control:	Optional feature on many 280E models.
Connectivity
Antenna System:	Power antenna, often with integrated signal amplifier in higher-end models.

Maintenance
Service Intervals
Oil Change Interval:	Typically every 7,500-15,000 km (4,600-9,300 miles) or annually, whichever comes first, depending on usage and oil quality. Check manual for specific recommendation.
Filter Replacement Interval:	Oil filter with every oil change. Air filter and fuel filter typically every 30,000-60,000 km (18,000-37,000 miles).
Spark Plug Replacement:	Typically every 40,000-60,000 km (25,000-37,000 miles).
Coolant Flush:	Every 2-3 years or 40,000-60,000 km (25,000-37,000 miles).
Fluid Specifications
Engine Oil Specification:	API SG or higher, SAE 10W-40 or 15W-40 recommended for general use. Refer to manual for seasonal variations.
Engine Oil Capacity:	Approx. 7.0 liters (7.4 US quarts) with filter change.
Coolant Specification:	Ethylene glycol-based antifreeze, mixed with distilled water (50/50 ratio). Mercedes-Benz specification 325.0 is often cited for this era.
Transmission Fluid Specification:	For automatic: MB spec 236.1 (e.g., Dexron II or equivalent). For manual: GL-4 gear oil.
Brake Fluid Specification:	DOT 3 or DOT 4 (check manual for definitive recommendation).
Known Issues
Rust:	Common issue, particularly on wheel arches, sills, door bottoms, and around window seals. Meticulous inspection and prevention are key.
Fuel System K Jetronic:	Can become clogged or develop leaks. Control pressure regulator and air flow meter are common service items.
Vacuum Lines:	Degradation of rubber vacuum lines can lead to various drivability issues and air leaks.
Thermo Time Switch:	Failure can affect cold starting and idle stability.
Suspension Bushings:	Wear on control arm bushings and ball joints is common and affects ride and handling.

Vehicle History
Brand Heritage
Mercedes Benz Legacy:	Mercedes-Benz, established in 1926, is renowned for pioneering automotive engineering, safety, and luxury.
Model Evolution
W123 Lineage:	The W123 replaced the W114/W115 series and was produced from 1975 to 1986. It was a major success, solidifying Mercedes-Benz's reputation for quality and reliability.
280E Positioning:	The 280E was positioned as a high-performance, luxury model within the W123 range, offering smooth inline-six power and refinement.
Production
Production Years:	W123 series: 1975-1986. The 280E variant was produced throughout this period, with minor updates.
Manufacturing Locations:	Primary manufacturing in Stuttgart, Germany, with assembly plants in other countries as well.

Awards & Recognition
Recognitions
Industry Acclaim:	The W123 series, including the 280E, is widely recognized as one of Mercedes-Benz's most durable and reliable vehicles ever produced. Often lauded in classic car circles for its engineering and longevity.
Typical Designation:	Often referred to as a 'tank' or 'workhorse' due to its build quality and ability to withstand high mileage.