🏷️ Basic Information

Make:

Mercedes-Benz

Model:

S500

Year:

1994

Chassis Code:

W140

Engine Code:

M119.970

👋 Introduction

Market Position:

The 1994 Mercedes-Benz S500 represented the pinnacle of luxury and engineering in its era, targeting affluent buyers seeking unparalleled comfort, performance, and technological innovation. This manual is essential for maintaining that elite status.

Competitive Analysis:

Competed against other flagship luxury sedans such as the BMW 7 Series (E38), Lexus LS 400, and Jaguar XJ. The S500 (W140) was renowned for its robust build quality and advanced features, often surpassing rivals in sheer technological content.

Key Features:

The W140 S-Class was a technological showcase, featuring advanced safety systems, a powerful V8 engine, and a sophisticated chassis. This manual provides the crucial information needed to service and repair these complex systems.

📋 Manual Details

Coverage Areas:

Full Service, Repair, Diagnostics, Maintenance, Electrical Schematics, Bodywork, Specifications

Page Count:

Extensive (Digital Software - comparable to thousands of printed pages)

Manual Type:

Official Factory Service & Repair Manual Software

Language:

English

Format:

Software (Digital Download)

Product Description Notes:

This is an officially licensed software product, ensuring accuracy and completeness as provided by the manufacturer. Offers digital convenience over older print formats.

📖 Manual Coverage

Systems Covered:

Engine Mechanical, Engine Performance, Fuel System, Ignition System, Emission Control, Cooling System, Lubrication System, Drivetrain, Transmission (Automatic), Brakes (ABS, ASR), Steering, Suspension (Front & Rear), Climate Control (HVAC), Electrical System (ECU, Body Control Modules, Lighting, Power Accessories), Body & Chassis, Interior & Exterior Trim, Diagnostic Trouble Codes (DTCs), Wiring Diagrams

Procedures Included:

Scheduled Maintenance, Routine Inspections, Engine Tune-Up, Oil & Filter Changes, Spark Plug Replacement, Coolant Flush, Brake System Service (Pad/Rotor Replacement, Fluid Flush), Power Steering Service, Suspension Component Replacement (Shocks, Struts, Bushings), Drivetrain Component Repair (Axles, Driveshafts), Transmission Service & Repair, Electrical System Troubleshooting, HVAC System Diagnosis & Repair, Body Panel Repair & Alignment, Interior Trim Removal & Installation, Diagnostic Procedures, Component Testing, Overhaul Procedures, Component Reassembly

Technical Depth:

Comprehensive; Covers basic maintenance through advanced diagnostics and complete unit overhauls. Includes detailed torque specifications, clearances, and procedural steps for factory-level repairs.

Diagnostic Tools:

Details procedures for using Mercedes-Benz specific diagnostic tools (e.g., Star Diagnosis systems, OBD-I scan tools for certain systems) and generic scan tools where applicable.

Wiring Diagrams:

Comprehensive color-coded wiring diagrams for all electrical systems, including engine control, lighting, comfort features, and safety systems.

Troubleshooting Guides:

Detailed symptom-based troubleshooting charts and flowcharts for diagnosing common and complex problems.

📊 Manual Specifications

File Format:

Proprietary Software / Digital Executable (Requires specific software to run or view, often with search functionality)

Print Quality:

N/A (Digital; Screen display optimized for clarity)

Binding Type:

N/A (Digital Software)

Paper Type:

N/A (Digital Software)

Content Scope:

Extensive and highly detailed, covering all aspects of vehicle repair and maintenance. Includes technical service bulletins (TSBs) and recall information where applicable.

⚙️ Engine Specifications

Primary Engine:

M119.970 - 5.0L V8 SOHC (32 Valve)

Horsepower:

322 hp @ 5500 rpm

Torque:

354 lb-ft @ 3900 rpm

Fuel System:

Bosch Motronic M L-Jetronic EFI (Electronic Fuel Injection) with Sequential Injection

Bore Stroke:

96.5 mm x 85.0 mm

Compression Ratio:

10.0:1

Engine Oil Capacity:

8.0 Liters (8.5 US Quarts) with filter change

Engine Oil Type:

SAE 5W-40 Synthetic (or as per Mercedes-Benz specification MB 229.5)

Ignition System:

Distributorless Electronic Ignition (HFM - Hot Film Mass Airflow controlled)

Timing Belt Chain:

Timing Chain (no replacement interval required, but tensioners and guides should be inspected)

🔧 Transmission

Standard:

4-Speed Automatic (722.6 - early production might use 722.3 but 722.6 is more common for this year and engine)

Features:

Electronic Control Unit (ECU) controlled, Driver-selectable modes (Economy/Sport), Lock-up Torque Converter

Transmission Fluid Type:

ATF Dexron III (or Mercedes-Benz Specification 236.1)

Transmission Fluid Capacity:

Approx. 8.0 Liters (17.6 US Pints) for complete refill

📐 Dimensions

Length:

5153 mm (202.9 in)

Width:

1886 mm (74.3 in)

Height:

1487 mm (58.5 in)

Wheelbase:

3040 mm (119.7 in)

Curb Weight:

Approx. 2000-2100 kg (4400-4600 lbs)

Gross Vehicle Weight Rating:

Approx. 2600 kg (5730 lbs)

🛡️ Safety Features

Ratings:

As per 1990s standards, robust construction. Specific NHTSA/IIHS ratings for this model year may not be directly comparable to modern standards.

Active Features:

Anti-lock Braking System (ABS), Acceleration Skid Control (ASR), Xenon Headlights (Optional/Standard depending on market/trim)

Passive Features:

Dual Front Airbags, Crumple Zones, Side-Impact Protection beams, Seatbelt Pretensioners

💡 Technology Features

Infotainment:

Original system featured a cassette player and a monochrome display for radio and climate control. Limited CD changer integration available.

Driver Assistance:

Electronic Traction System (ETS), Cruise Control, Parktronic (later models, may not be on all 1994 S500s)

Connectivity:

Original systems did not include modern Bluetooth or smartphone integration. Aftermarket solutions may be available.

Climate Control:

Dual-zone automatic climate control (Thermotronic) with recirculate function and air quality sensor.

Lighting:

Halogen headlights standard, Xenon HID headlights optional. Power-adjustable headlights, fog lamps.

🔧 Maintenance

Service Intervals:

Flexible service system (ASSYST) indicated by dashboard display. Typically: Oil & Filter every 10,000-15,000 miles or annually. Major services with spark plugs, coolant, brake fluid every 30,000-60,000 miles or as indicated.

Fluid Specifications:

Engine Oil: MB 229.5 (5W-40 Synthetic), Coolant: MB 325.0 (Glysantin G48), Brake Fluid: DOT 4 Plus (or MB 331.0), Power Steering Fluid: CHF 11S (Pentosin) or equivalent

Known Issues:

Distributorless Ignition Module (K40 relay failure), HEI (High Energy Ignition) coil issues, Crankshaft Position Sensor failure, CAN bus issues (though less prevalent on early models), Vacuum line leaks, Window regulator failures, Door lock actuator issues, Heater control valve leaks, Biodegradable wiring insulation degradation over time, Suspension self-leveling issues (if equipped)

Spark Plug Part Number:

NGK PFR54A-11 (or equivalent)

Air Filter Part Number:

Mann-Filter C35164 / C35164/1 (or equivalent)

Cabin Air Filter Part Number:

Mann-Filter CU2642 (or equivalent)

Battery Specifications:

Group 49 / H8 / 94R, 750-900 CCA

Torque Specifications:

Includes precise torque values for all critical fasteners, including engine components, suspension, brakes, and chassis bolts.

📚 Vehicle History

Brand Heritage:

Mercedes-Benz has a long-standing reputation for automotive excellence, luxury, safety, and engineering innovation, dating back to the invention of the automobile itself.

Model Evolution:

The W140 generation (1991-1998) succeeded the W126 S-Class. It was significantly larger, heavier, and packed with more technology, aiming to redefine the concept of a luxury flagship sedan. It faced some criticism for its size and perceived ostentatiousness compared to its predecessor.

Production Years:

1991-1998

Manufacturing Location:

Germany

🏆 Awards & Recognition

Recognitions:

While specific awards for the 1994 model year are less documented in the way modern cars are reviewed, the W140 generation consistently received accolades for its engineering and luxury appointments from automotive publications of the era.

Ratings:

Consistently ranked as a top luxury car by various automotive critics for its build quality and technological features.

Certifications:

N/A (Focus on manufacturer's own quality standards and internal certifications)