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1968-1976 Mercedes W114 and W115 Service and Repair Manual
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🏷️ Basic Information Identification Make: Mercedes-Benz Model: W114 / W115 Model Variant: All Models Year Range: 1968-1976 Codes Chassis Code: W114, W115 👋 Introduction Market Position Target Audience: Mercedes-Benz W114/W115...
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🏷️ Basic Information
Identification
Make:
Mercedes-Benz
Model:
W114 / W115
Model Variant:
All Models
Year Range:
1968-1976
Codes
Chassis Code:
W114, W115
👋 Introduction
Market Position
Target Audience:
Mercedes-Benz W114/W115 owners, independent repair shops, vintage car enthusiasts
Competitive Analysis
Value Proposition:
Provides factory-level, specific repair data, eliminating reliance on generic or incomplete sources.
Key Features
Feature 1:
Comprehensive, step-by-step repair instructions.
Feature 2:
High-quality diagrams, illustrations, and wiring schematics.
Feature 3:
Vehicle-specific, not generic repair information.
Feature 4:
All models and all repairs covered A-Z.
Feature 5:
Digital format offers flexibility and portability.
📋 Manual Details
Coverage Areas
Primary Coverage:
Service and Repair
Scope:
A-Z Repairs, Diagnostics, Maintenance
Page Count
Estimated Page Count:
Extensive (Full Factory Manual Scope)
Manual Type
Type:
Factory-Spec Technician Service Manual
Language
Language:
English
Format
Digital Format:
PDF
📖 Manual Coverage
Systems Covered
Engine Mechanical:
Complete overhaul, tuning, components
Fuel System:
Carburetor and injection systems, fuel pumps, lines, specifications
Ignition System:
Distributor, coils, plugs, timing, troubleshooting
Cooling System:
Radiator, thermostat, water pump, coolant specifications
Lubrication System:
Oil pump, filter, oil specifications, capacities
Intake Exhaust:
Manifolds, exhaust system, emissions control
Automatic Transmission:
Service, repair, fluid specifications, troubleshooting
Manual Transmission:
Complete repair and maintenance for manual gearbox, clutch assembly, and shift linkage.
Driveline:
Clutch, driveshaft, universal joints, differential, axles
Suspension Front:
Components, alignment, ball joints, bushings
Suspension Rear:
Components, alignment, bushings, shock absorbers
Steering System:
Steering box, linkage, power steering system
Brake System:
Hydraulic system, calipers, master cylinder, pads, shoes, parking brake
Electrical System:
Starter, alternator, battery, wiring harnesses, fuses, relays
Lighting System:
Headlights, taillights, interior lighting
Instrumentation:
Gauges, warning lights, dashboard components
Climate Control:
Heating, ventilation, optional air conditioning
Bodywork Exterior:
Doors, hood, trunk, glass, trim, bumpers
Bodywork Interior:
Seats, upholstery, trim panels, carpets
Safety Systems:
Seat belts, supplemental restraint systems (if applicable)
Engine Control System:
Engine tuning, idle speed, emission control system adjustments and servicing.
Emission Control:
Details on emission control devices and their maintenance for compliance.
Intake Exhaust Cooling:
In-depth coverage of intake manifolds, exhaust systems, and radiator/cooling fan operation.
Lube:
Engine lubrication system maintenance, oil capacities, and recommended lubricant types.
Ignition Starting Charging:
Comprehensive diagnostics and repair for the starting system (starter motor) and charging system (alternator, voltage regulator).
Auto Transmission Clutch:
Specific procedures for automatic transmission service, torque converter, and clutch-type systems if applicable to transmission type.
Transfer Propeller Shaft:
Maintenance and repair of driveshafts, universal joints, and associated components.
Drive Shaft:
Detailed inspection and servicing of drive shafts, including U-joints and center bearings.
Differential:
Service and repair of the rear axle differential, including fluid changes and potential rebuilds.
Axle Suspension:
Front and rear suspension components, including control arms, tie rods, springs, shocks, and alignment procedures.
Tire Wheel:
Information on wheel bearing service, tire pressure recommendations, and wheel balancing.
Brake Control:
Focus on the hydraulic brake system, including master cylinder, brake lines, and proportioning valves.
Brake:
Front disc brake caliper servicing, brake pad replacement, rear drum brake adjustment, and shoe replacement.
Parking Brake:
Adjustment and service of the parking brake mechanism.
Steering Column:
Service and repair of the steering column, including ignition lock and steering wheel removal.
Power Steering:
Maintenance and repair of the power steering pump, gearbox, and associated hoses and fluid.
Air Condition:
Service and repair procedures for the optional air conditioning system.
Suppl Restraint System:
N/A (Supplemental Restraint Systems like airbags were not common in this era).
Seat Belt:
Inspection, maintenance, and replacement of seat belt assemblies.
Engine Immobilizer:
N/A (Engine immobilizers were not standard features in this era).
Cruise Control:
Troubleshooting and repair of the optional cruise control system.
Wiper Washer:
Service and repair of the windshield wiper system and washer fluid reservoir/pump.
Door Lock:
Service and repair of door lock mechanisms, including central locking systems if equipped.
Meter Audio Visual:
Repair of instrument cluster gauges, warning lights, and factory audio systems.
Horn:
Troubleshooting and repair of the horn circuit and horn assembly.
Windshield Glass Mirror:
Procedures for windshield and glass replacement, and mirror adjustments/replacement.
Instrument Panel:
Removal, installation, and repair of the dashboard and associated components.
Seat:
Procedures for seat removal, adjustment mechanism repair, and upholstery.
Engine Hood Door:
Service and adjustment of hood latches and door hinges/latches.
Exterior Interior:
Covers various body trim, weatherstripping, and interior paneling repairs.
Electrical:
Comprehensive coverage of all wiring harnesses, electrical components, fuses, and relays.
Multiplex Can Communication:
Not applicable to this model range.
Procedures Included
Routine Maintenance:
Oil changes, fluid checks, filter replacements, tune-ups
Troubleshooting:
Diagnostic procedures for common and complex issues
Component Replacement:
Step-by-step instructions for replacing parts
Rebuilding:
Detailed procedures for rebuilding engines, transmissions, etc.
Diagnostics:
Methods for identifying problems with electrical and mechanical systems
Adjustment:
Carburetor, ignition timing, valve adjustments
Wiring Schematics:
Comprehensive electrical diagrams for all systems
Complete Repair:
Encompasses all aspects of vehicle repair from minor adjustments to full overhauls.
Diagnostics Procedures:
Detailed diagnostic trees and troubleshooting guides for electrical and mechanical faults.
Technical Specifications:
Includes all necessary torque values, clearances, fluid capacities, and other critical specifications.
Technical Depth
Depth:
Factory-level detail, suitable for professional technicians and serious DIYers
Specificity:
Vehicle-specific, not generic; covers all repairs A-Z
📊 Manual Specifications
File Format
File Type:
PDF
Searchability:
Searchable text within PDF
Print Quality
Printability:
All pages printable, including enlarged images/diagrams
Binding Type
Binding:
Digital (No physical binding)
Paper Type
Paper:
N/A (Digital Format)
Compatibility
Operating Systems:
Windows (Vista32/64, XP, ME, 98, NT, 2000) and Mac
Requirements
Software Requirements:
Adobe PDF Reader, Winzip (free)
⚙️ Engine Specifications
Primary Engine
Engine Types Covered:
Inline-4 (M115), Inline-6 (M114), Diesel (OM615, OM616)
Performance
Typical Engine Displacement Gas:
2.0L, 2.2L, 2.3L, 2.5L
Typical Engine Displacement Diesel:
2.0L, 2.2L
Fuel System
Fuel Delivery Gas:
Carburetor (e.g., Solex, Zenith) or Bosch D-Jetronic fuel injection (later models)
Fuel Delivery Diesel:
Bosch inline injection pump
🔧 Transmission
Standard
Manual Transmission:
4-speed and 5-speed manual transmissions
Optional
Automatic Transmission:
3-speed and 4-speed automatic transmissions (e.g., 4G-Tronic)
Features
Transmission Coverage:
Detailed service, repair, and adjustment procedures for both manual and automatic units.
📐 Dimensions
Exterior
Chassis Type:
Unibody construction
Weights
Curb Weight Range:
Approx. 1300-1500 kg (depending on engine and options)
🛡️ Safety Features
Ratings
Crash Safety Design:
Designed with crumple zones and reinforced passenger cell for the era.
Active Features
Brakes:
Front disc brakes, rear drum brakes (some later models may have rear discs).
Passive Features
Seatbelts:
Standard 3-point front seatbelts, lap belts in rear (may vary by market and year).
💡 Technology Features
Infotainment
Audio Systems:
Original factory radios, often AM/FM, with optional cassette players.
Driver Assistance
Cruise Control:
Optional cruise control system available on some models.
Connectivity
Multiplex Can Communication:
N/A (These vehicles predate multiplex/CAN bus systems; electrical systems are more traditional).
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 3,000-5,000 miles (check manual for specific engine/oil type)
Tune Up Interval:
Every 12,000-15,000 miles (includes spark plugs, points, timing)
Fluid Specifications
Engine Oil Viscosity:
Varies by engine and climate, often 10W-40 or 20W-50 (refer to manual for exact spec)
Coolant Type:
Ethylene glycol-based antifreeze/coolant with corrosion inhibitors (e.g., Mercedes-Benz specified coolant)
Transmission Fluid Auto:
Dexron II or equivalent (check manual for specific type)
Transmission Fluid Manual:
GL-4 gear oil (e.g., SAE 80W-90 or SAE 75W-90)
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid
Known Issues
Common Problem 1:
Rust susceptibility (especially wheel wells, rocker panels, door bottoms).
Common Problem 2:
Vacuum leak issues affecting climate control, central locking, and engine operation.
Common Problem 3:
Wear on suspension bushings leading to imprecise handling.
Common Problem 4:
Carburetor adjustment and maintenance requirements for older gasoline engines.
Common Problem 5:
Aging rubber hoses and seals in fuel, cooling, and brake systems.
📚 Vehicle History
Brand Heritage
Manufacturer Reputation:
Mercedes-Benz is renowned for engineering quality, durability, and safety.
Model Evolution
Model Introduction:
The W114 (luxury/six-cylinder) and W115 (standard/four-cylinder) were introduced in 1968, replacing the W110 'Fintail' range.
Design Philosophy:
Known for their robust construction, comfortable ride, and timeless design, often referred to as the 'New Generation' sedans.
Production
Production Period:
1968 - 1976
Body Styles:
4-door sedan (Saloon) and 2-door coupe
🏆 Awards & Recognition
Recognitions
Design Awards:
While specific awards may not be widely documented, the W114/W115 were highly regarded for their build quality and progressive design for their era.