Target Audience:
Professional mechanics, technicians, and dedicated DIY enthusiasts
Value Proposition:
Provides factory-level technical information for hands-on maintenance and repair, offering significant cost savings over dealership service.
Completeness:
Full factory coverage, not a condensed or partial manual.
Detail Level:
Step-by-step instructions with high-quality visuals for accurate execution of all procedures.
Engine:
Complete engine overhaul, tuning, diagnostics, fuel injection (Bosch D-Jetronic), ignition, cooling, lubrication
Transmission:
Manual and automatic transmission overhaul, repair, adjustments, fluid changes, driveshaft and differential
Brakes:
Hydraulic system, disc brake overhaul (front and rear), drum brake adjustments (rear parking brake), power assist (Bosch servo), fluid specifications
Electrical:
Wiring diagrams, starter, alternator, battery, lighting system, instrumentation, fuses, relays, power windows, radio systems
Suspension Steering:
Front independent suspension (double wishbone), rear independent suspension (semi-trailing arms), shock absorbers, springs, steering gear overhaul, power steering system
Body Chassis:
Body panel repair, door mechanisms, window glass replacement, interior trim, underbody protection, jacking points, lifting procedures
Routine Maintenance:
Oil changes, filter replacements, spark plug service, fluid checks and top-ups, lubrication points
Troubleshooting:
Step-by-step diagnostic procedures for common and uncommon faults across all systems
Repair Overhaul:
Detailed instructions for disassembling, repairing, and reassembling major components and systems
Specifications Data:
Torque specifications, clearances, alignment data, electrical resistance values, pressure readings
Depth:
Comprehensive, covering everything from basic service to full mechanical and electrical component rebuilds
Illustrations:
Hundreds of detailed photos and exploded diagrams
Accessibility:
Downloadable and usable on multiple devices (computer, tablet, smartphone)
Printability:
Printable (single pages or entire manual)
Usage License:
Lifetime usage, no expiry, no renewal fees
Software Compatibility:
Compatible with all Windows and MAC operating systems
Engine Type:
Inline-6 Cylinder, Overhead Camshaft (OHC)
Displacement:
2778 cc (2.8 Liters)
Bore X Stroke:
82.0 mm x 90.0 mm
Compression Ratio:
8.0:1 (typical for this era and engine)
Horsepower:
130-140 hp SAE Gross (approximate, depending on market and specific tune)
Torque:
230-240 Nm SAE Gross (approximate)
Fuel Delivery:
Bosch D-Jetronic Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline (premium unleaded recommended, 95 RON or higher)
Ignition Type:
Breakerless electronic ignition (typically Bosch)
Type:
4-speed Manual Transmission
Type:
4-speed Automatic Transmission (optional, likely with torque converter)
Clutch:
Single dry plate, hydraulically operated
Manual Transmission Fluid:
GL-4 Gear Oil, SAE 75W/90 or 80W/90 (verify with specific manual)
Automatic Transmission Fluid:
Dexron III or equivalent (verify with specific manual)
Seatbelts:
Standard front seatbelts, optional rear seatbelts
Body Construction:
Unitized body construction with integrated crumple zones, designed for structural integrity.
Steering Column:
Collapsible steering column for improved driver protection in frontal impacts.
Brakes:
Four-wheel disc brakes (front ventilated) with dual-circuit hydraulic system.
Brake Assist:
Power assisted braking system (Bosch servo)
Crash Testing:
Modern crash test data is not directly comparable to vehicles of this era; however, Mercedes-Benz historically prioritized safety engineering.
Audio System:
Factory original AM/FM radio, often with an optional 8-track player or cassette deck.
Cruise Control:
Optional cruise control system available on some models.
ABS:
Anti-lock Braking System (ABS) was not standard or widely available on W114 models; typically introduced on higher-end Mercedes models later.
Original Connectivity:
No modern connectivity features (Bluetooth, USB, etc.) as standard; aftermarket solutions are common.
Oil Change:
Every 5,000-7,500 km or 6-12 months (depending on driving conditions and oil quality)
Filter Replacement:
Oil filter with every oil change; air filter and fuel filter every 15,000-25,000 km
Spark Plugs:
Inspect every 10,000 km, replace every 20,000-30,000 km (depending on plug type)
Valve Adjustment:
Check and adjust every 20,000-30,000 km
Engine Oil:
API SF/CD rated, SAE 20W-50 or 10W-40 (depending on climate). Capacity: approx. 7.5 Liters.
Coolant:
50/50 mix of ethylene glycol coolant and distilled water. Capacity: approx. 10-12 Liters.
Brake Fluid:
DOT 3 or DOT 4 glycol-based brake fluid. Capacity: approx. 1 Liter.
Rust Corrosion:
Prone to rust, especially in wheel arches, sills, and underbody. Regular inspection and undercoating are crucial.
D Jetronic Fuel System:
Potential for fuel distributor leaks, vacuum leaks, and faulty air flow sensor or control pressure regulator (CPR).
Suspension Wear:
Wear in ball joints, control arm bushings, and tie rod ends can lead to steering looseness and premature tire wear.
Vacuum Lines:
Degradation of rubber vacuum lines can cause drivability issues, particularly with the fuel injection and HVAC systems.
Climate Control HVAC:
Older HVAC systems may require service for blower motor, refrigerant leaks, or actuator issues.
Brand Philosophy:
Mercedes-Benz is renowned for its engineering excellence, durability, safety innovation, and luxury.
Predecessor:
Heckflosse (Fintail) W110/W111/W112 series.
Successor:
W123 E-Class Series.
Production Period:
1968-1976 (W114/W115 chassis)
Manufacturing Location:
Germany (primarily Sindelfingen)
Nickname:
'Stroke Eight' (due to its introduction in 1968)
