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Mercedes Benz

Mercedes Benz Unimog 4X4 Type 404 404.0 404.1 1955-1980 Full Service & Repair Manual

Mercedes Benz Unimog 4X4 Type 404 404.0 404.1 1955-1980 Full Service & Repair Manual

$16.99
$16.99
Rea SlutsÄld
Frakt berÀknas i kassan.
Vehicle data plateRef 160276
Brand
Mercedes Benz
Vehicle
Trucks
Models covered
404.0, 404.1, Mercedes, Unimog, Unimog 4X4 Type 404
Years
1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

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  • The same link is emailed to you — re-download any time
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  • Not sure it covers your model year? Ask us before you buy
đŸ·ïž Basic Information
Identification
Make:
Mercedes-Benz
Model:
Unimog
Series:
404
Model Codes:
404.0, 404.1
Production Years Covered:
1955-1980
👋 Introduction
Market Position
Vehicle Class:
Off-road utility vehicle, military and civilian applications.
Segment:
Heavy-duty, all-terrain, specialist vehicle.
Competitive Analysis
Competitors:
Historically, few direct competitors due to its unique design and capabilities. Vehicles like Land Rover Wolf, Pinzgauer, and specific military trucks could be considered in some contexts.
Key Features
Unique Selling Points:
Exceptional off-road capability, robust construction, portal axles, high ground clearance, potential for various body configurations and PTO applications.
Manual Value Proposition
Target Audience:
Unimog owners, mechanics specializing in Mercedes-Benz vehicles, collectors, and restoration specialists.
Benefit:
Enables accurate and efficient maintenance, troubleshooting, and repair, preserving the vehicle's legendary performance and longevity.
📋 Manual Details
Coverage Areas
Overall Coverage:
Comprehensive factory service and repair for all aspects of the Unimog 404 series.
Geographic Scope:
Global (reflecting original Mercedes-Benz documentation scope)
Page Count
Estimated Page Count:
Hundreds (stated as such in product description)
Manual Type
Type:
Factory Service Repair Workshop Manual
Language
Language:
Likely English (based on product description language, original may vary)
Format
Format:
Downloadable PDF
📖 Manual Coverage
Systems Covered
Engine:
Detailed maintenance, troubleshooting, and repair for gasoline and diesel engines (specific variants will be detailed within).
Transmission:
Service and repair of gearbox, transfer case, and ancillary drivetrain components.
Axles And Differentials:
Inspection, maintenance, and overhaul procedures for portal axles and locking differentials.
Brakes:
Service and repair for hydraulic brake systems, including drums, lines, and master cylinder.
Suspension And Steering:
Maintenance and repair of springs, shock absorbers, steering linkages, and steering gear.
Electrical System:
Troubleshooting and repair of all electrical circuits, including lighting, ignition, starting, and charging systems.
Fuel System:
Service and repair for fuel tanks, pumps, lines, and carburetors (for gasoline variants).
Cooling System:
Maintenance and repair of radiators, water pumps, thermostats, and hoses.
Exhaust System:
Inspection and replacement of exhaust components.
Chassis And Frame:
Inspection and repair of the frame and chassis structure.
Bodywork:
Repair and maintenance procedures for cab and body panels.
Hydraulics:
Service and repair for hydraulic systems, including PTO, implement hydraulics, and power steering (if applicable).
Power Take Off Pto:
Detailed information on PTO operation, maintenance, and repair.
Procedures Included
Preventative Maintenance:
Scheduled maintenance tasks, lubrication, and fluid level checks.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common and complex issues.
Routine Repairs:
Step-by-step instructions for common repair tasks.
Major Overhauls:
Detailed procedures for complete engine, transmission, and axle rebuilds.
Component Replacement:
Instructions for replacing individual parts and sub-assemblies.
Adjustment Procedures:
Specifications and methods for adjusting critical components like brakes and clutch.
Technical Depth
Depth:
Extremely high: Suitable for professional mechanics and advanced DIY technicians.
Diagnostic Capability:
Encompasses advanced diagnostic trees and fault code interpretation (where applicable).
Diagrams And Illustrations:
Hundreds of detailed photos and exploded diagrams for precise assembly and disassembly.
📊 Manual Specifications
File Format
Format:
PDF
Compatibility:
Windows and macOS compatible
Searchability:
Assumed searchable text due to PDF format (dependent on original scanning quality).
Print Quality
Printability:
Printable (single pages or entire manual)
Binding Type
Binding:
N/A (Digital Download)
Paper Type
Paper:
N/A (Digital Download)
Licensing
Usage Rights:
Unlimited use, no expiry, can be used on multiple devices.
⚙ Engine Specifications
Primary Engine Gasoline
Engine Code Example:
M180 (inline-six gasoline)
Displacement Gasoline:
Approx. 2.2 to 3.0 Liters (depending on specific variant)
Horsepower Gasoline Approx:
80-100 HP (depending on variant)
Primary Engine Diesel
Engine Code Example:
OM312 (inline-four diesel)
Displacement Diesel:
Approx. 4.6 Liters
Horsepower Diesel Approx:
60-70 HP (depending on variant)
Performance
Torque Characteristics:
Emphasis on low-end torque for off-road traction and pulling power.
Fuel System
Gasoline Fuel System:
Carbureted (e.g., Solex, Zenith)
Diesel Fuel System:
Injection pump and injectors
🔧 Transmission
Standard
Gearbox:
Manual transmission with multiple forward and reverse gears, often featuring a crawler gear.
Transfer Case:
2-speed transfer case with selectable 4WD and differential locking capabilities.
Features
Clutch Type:
Single dry-plate clutch
Gear Ratios:
Specific gear ratios provided for each gear and transfer case range within the manual.
📐 Dimensions
Exterior
Wheelbase Approx:
2150 mm to 2700 mm (depending on variant)
Ground Clearance Approx:
Over 400 mm (significantly high)
Weights
Curb Weight Approx:
2500 - 3500 kg (depending on configuration)
Payload Capacity Approx:
Up to 2000 kg (depending on variant)
đŸ›Ąïž Safety Features
Ratings
Crash Test Ratings:
Not applicable to original era and vehicle type; emphasis on inherent ruggedness and operational safety.
Active Features
Traction Control:
Achieved through selectable 4WD, differential locks, and portal axles.
Passive Features
Rollover Protection:
Robust cab structure and provision for roll-over protection (ROPS) depending on specific military configurations.
💡 Technology Features
Infotainment
Infotainment System:
Basic; primarily functional radio (if fitted) and instrumentation. No advanced digital systems.
Driver Assistance
Driver Assistance Features:
None typically fitted in the modern sense. Driver reliance on vehicle control and terrain awareness.
Connectivity
Connectivity Features:
None.
🔧 Maintenance
Service Intervals
Oil Change Engine:
Refer to manual for specific intervals (typically every 5,000-10,000 km for diesel, potentially less for gasoline).
Transmission Fluid Change:
Refer to manual, typically at significant mileage intervals or after heavy use.
Fluid Specifications
Engine Oil Type Diesel:
API CD or equivalent, specific viscosity (e.g., SAE 30, 15W-40) based on ambient temperature. Manual will specify exact MB approval.
Engine Oil Type Gasoline:
API SE/SF or equivalent, specific viscosity (e.g., SAE 20W-50) based on ambient temperature. Manual will specify exact MB approval.
Transmission Fluid:
Manual transmission fluid (MTF) or gear oil meeting MB specifications (e.g., MB-Approval 235.0).
Coolant:
Ethylene glycol-based antifreeze, often requiring specific Mercedes-Benz coolant additives (e.g., MB-Approval 325.0).
Brake Fluid:
DOT 3 or DOT 4 brake fluid, conforming to Mercedes-Benz specifications.
Known Issues
Common Wear Items:
Brake components, clutch, universal joints, pivot bearings, exhaust system, seals and gaskets due to age and operating conditions.
Potential Issues:
Corrosion, electrical system issues due to age, carburetor adjustments (gasoline), diesel injection pump calibration.
📚 Vehicle History
Brand Heritage
Parent Company:
Daimler-Benz AG (now Daimler AG)
Model Evolution
Origin:
Developed post-WWII for agricultural and military use, building on Mercedes-Benz's engineering legacy.
Key Development:
The 404 series represented a significant evolution, becoming one of the most iconic and versatile Unimog models.
Production
Manufacturing Location:
Gaggenau, Germany
Production Volume:
Significant numbers, serving diverse global markets and military forces.
🏆 Awards & Recognition
Recognitions
Military Designations:
Widely adopted by military forces worldwide, attesting to its reliability and performance in demanding conditions.

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Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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