Market Segment:
Full-size luxury sedan
Target Audience:
Discerning luxury car buyers seeking comfort, performance, and advanced technology
Key Competitors:
BMW 7 Series (E38), Lexus LS400 (XF10), Audi A8 (D2), Jaguar XJ
Vehicle Philosophy:
Engineering excellence, ultimate comfort, safety, and technological innovation
Distinctive Features:
Impressive build quality, advanced safety systems for its era, powerful V8 engine, spacious and opulent interior
Primary Coverage:
Mechanical, Electrical, Bodywork, Maintenance
Diagnostic Coverage:
Engine, Transmission, ABS, Airbag, Climate Control
Trim Level Coverage:
All S500 variants for 1995
Estimated Page Count:
1500+
Manual Type:
Factory Service Manual / Repair Manual
Engine Mechanical:
Engine assembly, cylinder head, valvetrain, crankshaft, pistons, connecting rods, lubrication, cooling
Engine Management:
Fuel injection (Bosch LH-Jetronic), ignition system, engine control module (ECM)
Transmission:
4-speed automatic transmission (722.4), transmission control module (TCM), fluid type, overhaul
Drivetrain:
Driveshafts, differential, rear axle
Suspension:
Front suspension (independent, multi-link), rear suspension (independent, multi-link), shock absorbers, springs, bushings
Steering:
Power steering system, steering column, steering gear
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), brake pads, rotors, calipers, fluid specifications
Electrical System:
Battery, charging system (alternator), starter, lighting, fuses, relays, wiring diagrams
Body And Interior:
Body panels, doors, hood, trunk, interior trim, seats, glass, sunroof (if equipped)
Climate Control:
HVAC system, air conditioning, heater core, blower motor, controls
Safety Systems:
Airbag system (SRS), seatbelt pre-tensioners
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, belt inspections
Troubleshooting:
Diagnostic trouble codes (DTCs), symptom-based troubleshooting for all major systems
Repair Procedures:
Step-by-step guides for component removal, installation, and adjustment
Overhaul Procedures:
Detailed instructions for complete engine and transmission rebuilds
Wiring Diagrams:
Comprehensive electrical schematics for all circuits
Specifications:
Torque values, clearances, fluid capacities, pressure readings
Depth Level:
Comprehensive (from basic maintenance to major component overhaul and diagnostics)
Diagnostic Tools Required:
OBD-II scanner (for later models, but this era uses proprietary diagnostics), Mercedes-specific diagnostic tools (e.g., Star Diagnosis)
Engine Type:
V8, SOHC (Single Overhead Camshaft)
Displacement:
4973 cc (5.0 Liters)
Bore X Stroke:
96.5 mm x 85.0 mm
Compression Ratio:
10.0:1
Horsepower:
322 hp @ 5,500 rpm (approx.)
Torque:
347 lb-ft @ 3,900 rpm (approx.)
Fuel Injection:
Bosch LH-Jetronic Electronic Fuel Injection
Fuel Type:
Premium Unleaded Gasoline (91+ Octane)
Cooling Type:
Liquid-cooled
Oil Capacity:
8.0 Liters (8.5 US Quarts)
Oil Specification:
API SG/SH, SAE 0W-40 or 5W-40 (check manual for specific recommendations)
Transmission Type:
4-speed Automatic (722.4)
Gear Ratios:
Provided in manual (specific ratios vary)
Transmission Control:
Electronic Control Module (TCM) for shift logic and comfort
Fluid Type:
MB 236.1 or MB 236.3 Automatic Transmission Fluid
Transmission Fluid Capacity:
Approximately 8.0 Liters (17.0 Pints) for total refill (check manual for drain/fill capacity)
Crash Test Information:
Specific NHTSA/IIHS ratings for this era are less standardized; W140 known for robust construction. Refer to manual for passive safety system details.
ABS:
Standard Anti-lock Braking System
Traction Control:
Optional Acceleration Slip Regulation (ASR)
Airbags:
Driver and front passenger airbags (SRS - Supplemental Restraint System)
Seatbelts:
Front and rear seatbelts, front seatbelt pre-tensioners
Oil Change Interval:
10,000-15,000 km (6,000-9,000 miles) or 12 months, whichever comes first (refer to manual for exact schedule based on driving conditions)
Transmission Fluid Service:
Typically every 60,000-100,000 km (37,000-60,000 miles), consult manual for specific interval and procedure.
Coolant Type:
Mercedes-Benz Approved Antifreeze/Coolant (e.g., G48 or similar, blue)
Common W140 Issues:
Headlight leveling system (HLS) failure, sagging headliner, vacuum system leaks (door locks, central locking), ABS/ASR warning lights, spark plug well seal leaks, cooling system component wear (e.g., plastic coolant pipes, reservoir)
Manual Advantage For Issues:
Provides detailed diagnostic procedures and repair steps to address common W140 issues, saving on costly dealer repairs.
Brand Legacy:
Mercedes-Benz: Renowned for engineering, luxury, durability, and pioneering automotive technology since the late 19th century.
W140 Introduction:
The W140 generation succeeded the W126 S-Class and was produced from 1991 to 1998. It represented a significant leap in size, technology, and luxury.
W140 Development Goals:
Designed to be the 'ultimate' luxury sedan, setting new benchmarks in comfort, safety, and technology, often seen as an over-engineered masterpiece.
Production Years:
1991-1998
Manufacturing Locations:
Germany (Sindelfingen)
