Target Audience:
Do-it-yourselfers and experienced mechanics seeking comprehensive repair and maintenance information for the Mercedes-Benz W123 280E.
Advantage:
Offers the completeness of an official factory service manual in a convenient digital format, saving costs associated with physical manuals and shipping.
Feature 1:
Comprehensive coverage of all vehicle systems and repair procedures.
Feature 2:
Detailed, step-by-step instructions with high-quality illustrations.
Feature 3:
Troubleshooting and electrical diagnostics with detailed wiring diagrams.
Feature 4:
Printable pages for convenient use during repairs.
Engine:
Complete engine repair, overhaul, diagnostics, timing, fuel injection system (Bosch K-Jetronic), cooling system.
Transmission:
Automatic and Manual transmission overhaul, repair, fluid specifications, shift linkage.
Electrical:
Comprehensive electrical system diagnostics, wiring diagrams, starter, alternator, ignition system, lighting, accessories, fuse box.
Brakes:
Brake system repair, disc brakes, brake pads, rotors, calipers, brake fluid, ABS (if equipped).
Suspension:
Front and rear suspension components, shock absorbers, springs, control arms, bushings, steering linkage.
Steering:
Power steering system, steering gearbox, tie rods, steering column.
Body:
Body panel repair, doors, windows, locks, hinges, bumpers, interior trim, convertible top (if applicable).
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system diagnosis and repair, refrigerant, compressor, blower motor.
Maintenance:
Routine maintenance, oil changes, filter replacements, tune-ups, spark plug replacement, fluid checks and changes.
Troubleshooting:
Diagnostic procedures for common problems, symptom-based troubleshooting guides, electrical troubleshooting charts.
Repair:
Step-by-step repair instructions for all major components and systems, including engine rebuilds, transmission overhauls, and brake replacements.
Disassembly Assembly:
Complete disassembly and reassembly procedures for all vehicle systems and components.
Depth:
Full Factory Level (Do-it-yourselfer to Experienced Mechanic)
Detail Level:
Detailed substeps, notes, cautions, and warnings for critical information.
Quality:
Hundreds of photos and illustrations, detailed drawings.
Detail Enhancements:
Enlarged insets for detailed part examination, bold figure numbers for easy matching.
Engine Type:
Inline 6-Cylinder, Naturally Aspirated
Engine Code:
M110.984 / M110.986 (depending on market and specific variant)
Displacement:
2.8 Liters (2746 cc)
Horsepower:
Approximately 185 PS (136 kW; 182 hp) at 5800 rpm (DIN)
Torque:
Approximately 240 Nm (177 lb-ft) at 4500 rpm (DIN)
Fuel Delivery:
Bosch K-Jetronic Continuous Fuel Injection (CIS)
Fuel Type:
Unleaded Gasoline (91 RON or higher recommended)
Type:
Breakerless Electronic Ignition (e.g., Bosch)
Length:
Approximately 4725 mm (186.0 in)
Width:
Approximately 1790 mm (70.5 in)
Height:
Approximately 1430 mm (56.3 in)
Curb Weight:
Approximately 1450-1500 kg (3197-3307 lbs), depending on configuration
Gross Vehicle Weight Rating:
Typically around 1950-2000 kg
Crash Test History:
W123 models are generally considered robust for their era, with notable structural integrity. Specific NHTSA/Euro NCAP ratings from this period are less standardized compared to modern vehicles but were highly regarded for their time.
Feature 1:
Four-wheel disc brakes (front ventilated)
Feature 2:
Recirculating ball steering (with power assist)
Feature 1:
Reinforced safety cage construction
Feature 2:
Collapsible steering column
Feature 3:
Laminated front windshield
Feature 4:
Safety belts (front and rear)
Oil Change:
Typically every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions.
Transmission Fluid Change:
Automatic: Every 30,000-50,000 miles (50,000-80,000 km). Manual: As needed or at major service.
Engine Oil:
API SG or higher, SAE 10W-40 or 10W-50 (check manual for specific viscosity based on climate).
Coolant:
Mercedes-Benz approved coolant, typically a 50/50 mix of coolant and distilled water.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Power Steering Fluid:
Mercedes-Benz power steering fluid or equivalent DEXRON III ATF.
Issue 1:
Vacuum hose deterioration: Leads to vacuum leaks affecting engine performance, central locking, and climate control.
Issue 2:
K-Jetronic fuel distributor and air flow meter issues: Can cause rough idling, misfires, and poor performance. Requires specialized knowledge for diagnosis and repair.
Issue 3:
Rust: Common areas include wheel arches, rocker panels, and undercarriage. Regular inspection and rust prevention are crucial.
Issue 4:
Electrical connector corrosion: Can lead to intermittent faults in various systems.
Legacy:
Mercedes-Benz has a long-standing reputation for engineering excellence, durability, and luxury, particularly evident in the W123 era.
W123 Generation:
The W123 series, produced from 1976 to 1986, succeeded the W114/W115 and was known for its build quality, reliability, and comfortable ride. The 280E represented the higher-end of the gasoline engine offerings.
Production Years:
W123 Series: 1976-1986
Manufacturing Locations:
Germany (Sindelfingen, Bremen), South Africa, Argentina, Brazil, Poland, and Yugoslavia.
