🏷️ Basic Information

Make:

Mercedes-Benz

Model:

S-Class

Chassis Code:

W140

Product Name:

Mercedes Benz VF140 1997-1998 Full Service & Repair Manual Download PDF

👋 Introduction

Market Position:

The Mercedes-Benz W140 S-Class represented the pinnacle of automotive luxury and engineering in its era, targeting a discerning clientele seeking unparalleled comfort, safety, and performance. This manual caters to owners and technicians working on this flagship vehicle.

Competition:

Competed directly with other ultra-luxury sedans of the late 1990s, such as the BMW 7 Series (E38), Lexus LS 400, and Rolls-Royce Silver Seraph, often distinguishing itself with advanced technology and robust build quality.

Manual Value Proposition:

Provides professional-grade, comprehensive service and repair information, mirroring factory technician resources, enabling DIYers and professionals to perform accurate and efficient maintenance and repairs on the W140 chassis.

Scope Of Coverage:

Covers all aspects of vehicle repair and maintenance, from routine servicing to complex system overhauls, ensuring no task is insurmountable for the user.

📋 Manual Details

Applicable Years:

1997, 1998

Market Segment:

Full vehicle coverage

Estimated Pages:

Hundreds (actual number not specified, but described as 'very detailed' with 'hundreds of pages')

Type:

Factory Service Repair Workshop Manual

Language:

English (implied by product description)

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Engine assembly, disassembly, timing, valve train, cooling system, lubrication system, fuel delivery, emission controls, engine diagnostics, engine rebuilding.

Engine Electrical:

Ignition system, starting system, charging system, engine control module (ECM) wiring diagrams, sensors, actuators, troubleshooting.

Transmission:

Automatic transmission service, repair, troubleshooting, fluid changes, torque converter, control systems (e.g., electronically controlled transmission).

Drivetrain:

Driveshafts, differentials, axle components, wheel bearings, troubleshooting.

Suspension:

Front and rear suspension components, shock absorbers, springs, control arms, bushings, alignment specifications, troubleshooting.

Steering:

Power steering system, steering column, steering gear/rack, troubleshooting.

Brakes:

Brake system hydraulic components (master cylinder, calipers, lines, hoses), brake pads, rotors, ABS system, parking brake, troubleshooting.

Electrical System:

12V electrical system, battery, alternator, starter, fuses, relays, lighting system, wiring harnesses, troubleshooting.

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) system components, refrigerant, troubleshooting, climate control module.

Body And Interior:

Body panels, doors, windows, locks, interior trim, seating mechanisms, convertible top mechanisms (if applicable), sunroof, troubleshooting.

Safety Systems:

Airbag system, seat belt pre-tensioners, ABS, traction control system (ASR), troubleshooting.

Infotainment And Electronics:

Audio system, navigation system (if equipped), power accessories (windows, seats, mirrors), central locking, keyless entry, instrument cluster, troubleshooting.

Maintenance:

Scheduled maintenance intervals, fluid level checks, filter replacements, lubrication points, battery maintenance.

Troubleshooting:

Systematic diagnostic procedures for all major vehicle systems, fault code interpretation (where applicable).

Repair:

Step-by-step repair instructions for virtually all components and systems, including engine, transmission, brakes, suspension, electrical, and bodywork.

Diagnostics:

Detailed diagnostic trees and procedures for identifying and rectifying faults.

Assembly Disassembly:

Comprehensive instructions for removing and reinstalling components, often with specific torque specifications.

Wiring Diagrams:

Detailed electrical wiring diagrams for all vehicle systems.

Depth:

Comprehensive (covers all repairs, servicing, and troubleshooting procedures, including rebuilds and advanced diagnostics).

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely searchable text within PDF (standard for professional manuals).

Print Capability:

Printable (single pages or entire manual).

Image Quality:

High-quality, detailed photos & diagrams.

Binding:

Digital download (no physical binding).

Paper:

N/A (Digital format).

Usage License:

Unlimited usage on multiple devices, lifelong access (no expiry, no renewal fees).

Operating Systems:

Windows and MAC compatible.

⚙️ Engine Specifications

Engine Code M119 V8:

4.2L (4196 cc) M119 V8, 5.0L (4973 cc) M119 V8

Engine Code M120 V12:

6.0L (5987 cc) M120 V12 (S600 models)

Horsepower M119 5.0L:

Approx. 302 hp @ 5600 rpm (US Market)

Torque M119 5.0L:

Approx. 339 lb-ft @ 3900 rpm (US Market)

Horsepower M120 6.0L:

Approx. 389 hp @ 5200 rpm (US Market)

Torque M120 6.0L:

Approx. 420 lb-ft @ 3800 rpm (US Market)

Fuel Injection:

Bosch Motronic EFI (Electronic Fuel Injection)

ECU Type:

Various Bosch Motronic variants depending on engine and market.

Block Material:

Aluminum Alloy (M119 and M120)

Head Material:

Aluminum Alloy (M119 and M120)

Configuration:

DOHC (Double Overhead Camshafts), 4 valves per cylinder.

🔧 Transmission

Transmission Type:

4-speed Automatic (4G-TRONIC) for most models, 5-speed Automatic (5G-TRONIC) introduced later and on higher performance variants.

Optional Transmission Type:

5-speed Automatic (5G-TRONIC) became more prevalent in later model years (e.g., S500/S600).

Control System:

Electronically controlled with multiple shift modes (e.g., Comfort, Sport).

Transmission Fluid Type:

MB 236.1, MB 236.3 or MB 236.4 (Dexron III equivalent depending on specific transmission and year - consult manual for exact specification).

📐 Dimensions

Length Standard Wheelbase:

Approx. 199.9 inches (5075 mm)

Length Long Wheelbase:

Approx. 204.3 inches (5190 mm)

Width:

Approx. 73.6 inches (1870 mm)

Height:

Approx. 58.3 inches (1480 mm)

Curb Weight S500:

Approx. 4300-4500 lbs (1950-2040 kg)

Curb Weight S600:

Approx. 4600-4800 lbs (2090-2180 kg)

🛡️ Safety Features

NHTSA Ratings:

Specific NHTSA ratings for 1997-1998 W140 are not readily available as independent testing was less standardized. However, Mercedes-Benz historically prioritized safety, incorporating advanced features.

ABS:

Standard Anti-lock Braking System (ABS).

Asr:

Standard Acceleration Slip Regulation (ASR) - Traction Control.

Esp:

Electronic Stability Program (ESP) became available on some models in later years of the W140 production, but might not be standard across all 1997-1998 variants.

Airbags:

Driver and front passenger airbags, side airbags (often optional or standard on higher trims).

Seatbelts:

Pre-tensioning seat belts with force limiters.

Body Structure:

High-strength steel safety cage and crumple zones.

💡 Technology Features

Audio System:

Factory premium sound systems (e.g., Becker or Bose), often with CD changer integration. Manual covers basic diagnostics and speaker replacement.

Navigation:

Optional factory navigation system available on some models, typically using CD-ROM maps. Manual may cover system operation or basic troubleshooting.

Cruise Control:

Standard cruise control system with electronic actuation.

Parking Sensors:

Optional PARKTRONIC parking assist system available on later models.

Tele Aid:

Optional Tele Aid emergency communication system, a precursor to modern telematics.

Power Seats:

Standard power-adjustable front seats with memory functions. Manual covers seat mechanism repair.

Dual Zone Climate Control:

Automatic dual-zone climate control system with independent temperature settings for driver and passenger.

🔧 Maintenance

Oil Change Interval:

Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or 12 months, depending on driving conditions and oil type used. Refer to manual for specific recommendations.

Major Service Interval:

Major service intervals (e.g., spark plug replacement, coolant flush) typically around 30,000 - 60,000 miles (48,000 - 96,000 km).

Engine Oil Type:

SAE 0W-30, 0W-40, 5W-40, or 5W-50 synthetic oil meeting Mercedes-Benz specification MB 229.3 or MB 229.5 (check manual for exact specification based on engine variant).

Coolant Type:

Proprietary Mercedes-Benz coolant (e.g., G05 or similar) mixed with distilled water, typically a 50/50 ratio. Refer to manual for MB specification (e.g., MB 325.0).

Brake Fluid Type:

DOT 4 Low Viscosity (LV) brake fluid meeting MB specification 331.0.

Wiring Harness Degradation:

Known issue with insulation breakdown on engine wiring harnesses (EZL, LH Jetronic) due to age, leading to intermittent electrical problems. The manual will detail diagnostic procedures for these.

Headliner Sagging:

Common interior issue where the headliner fabric detaches due to adhesive failure. Repair involves re-gluing or replacing the headliner.

Window Regulator Failure:

Power window regulators can fail, often due to plastic gear wear or motor issues. The manual covers removal and replacement procedures.

Catalytic Converter Issues:

Older catalytic converters may fail or become clogged, impacting performance. The manual will assist in diagnosing exhaust system issues.

Vacuum System Leaks:

The W140 utilizes a complex vacuum system for various functions (door locks, climate control flaps). Leaks can cause system malfunctions. The manual will aid in tracing these.

📚 Vehicle History

Mercedes Benz Legacy:

Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and safety dating back to the early 20th century, with the S-Class lineage representing its top-tier luxury sedan for decades.

W140 Introduction:

The W140 generation S-Class was introduced in 1991 as the successor to the W126 S-Class. It was a significant evolution, larger, heavier, and packed with more technology.

W140 Facelift:

A mild facelift occurred in 1994/1995, which included smaller exterior mirrors, revised door paneling, and some powertrain updates. The 1997-1998 models represent the later iteration of the W140.

Production Period:

1991-1998

Assembly Plants:

Primarily Sindelfingen, Germany.

🏆 Awards & Recognition

Design Awards:

While specific awards for the 1997-1998 facelift are not prominently documented, the W140 generation was recognized for its design and engineering advancements at its introduction, establishing benchmarks for luxury sedans.

Consumer Reports Ratings:

Consumer reports ratings for this era often highlighted strong performance and luxury but also noted potential for higher maintenance costs and specific component failures common to complex luxury vehicles. The manual is crucial for mitigating these.