The 1991 Mercedes-Benz S-Class, part of the W140 generation (1991-1998), is a full-size luxury sedan renowned for its robust build and technological advancements. Available in standard and long-wheelbase versions, key trims included the S300, S350, S420, S500, and S600. It introduced features like dual-pane glass and power closing doors. Its popularity stemmed from its opulent cabin, sophisticated engineering, and status as a benchmark for luxury and safety, setting a high price point for its era.
The Good
The 1991 S-Class offers exceptional ride comfort and a commanding road presence, appealing to those seeking luxury and status. Its robust engineering promises long-term durability and reliable performance for practical buyers, while the opulent interior provides a serene and refined driving experience.
The Bad
Potential owners should be aware of complex electronics that can be costly to repair, particularly window regulators, vacuum systems, and climate control. Older models may also suffer from rust, especially in certain climates, and the sheer complexity means maintenance can be expensive.
1991 Mercedes-Benz S-Class: Quick Overview
- Engine Options:
- 3.0L Inline-6 (S300 - diesel in some markets, gasoline in others)
- 3.5L Inline-6 (S350 - gasoline)
- 4.2L V8 (S420)
- 5.0L V8 (S500)
- 6.0L V12 (S600)
- Horsepower (approximate ranges):
- Inline-6: 150-220 hp
- V8: 228-275 hp
- V12: 300-408 hp
- Fuel Economy (EPA estimates, varies greatly by engine and driving conditions):
- Inline-6: Around 17-20 MPG combined
- V8: Around 15-18 MPG combined
- V12: Around 13-16 MPG combined
- 0-60 Times (approximate, varies by engine):
- Inline-6: 9-11 seconds
- V8: 7-8 seconds
- V12: 6-7 seconds
- Towing Capacity: Not generally applicable or advertised for this luxury sedan.
- Key Trim-Level Features (dependent on specific model and options):
- Standard: Automatic climate control, power-adjustable front seats with memory, leather upholstery, power windows and locks, sunroof, cruise control, ABS.
- Higher Trims (S500, S600): Larger engines, premium sound system, heated seats, power rear seats, dual-pane acoustic glass, self-leveling suspension, optional Bose sound system, optional rear-seat climate control.
- W140 specific innovations: Dual-pane glass for sound insulation, rain-sensing wipers (on later models), telescoping steering wheel, optional heated windshield, power closing doors and trunk.
1991 Mercedes-Benz S-Class Specifications
Vehicle Information
| Year | 1991 |
| Make | Mercedes-Benz |
| Model | S-Class |
| Trim | - |
| Style | Sedan |
| Type | Sedan |
| Category | Mid-Size Car |
Manufacturing Details
| Made In | Germany |
| Manufacturing City | SINDELFINGEN |
Dimensions
| Doors | 4-Door |
| Curb Weight | 4100 pounds |
| Gross Vehicle Weight Rating | - |
| Overall Height | 56.30 inches |
| Overall Length | 208.10 inches |
| Overall Width | 71.70 inches |
| Wheelbase Length | 121.10 inches |
| Standard Seating | 5 |
Engine & Performance
| Engine | 5.6-L V-8 SOHC 16V |
| Engine Size | 5.6L |
| Engine Cylinders | 8 |
| Transmission | 4-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 4-Speed |
| Drivetrain | Rear-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Recirculating |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $75,100 |
| Invoice Price | - |
| Delivery Charges | - |
Vehicle History Report
Vehicle
Specifications
Specifications
Ownership
History
History
All History
Events
Events
NMVTIS Title
History Check
History Check
Salvage/Rebuilt
Check
Check
Accident
Check
Check
Theft
Check
Check
Open Lien
Check
Check
Past Sale
Listings
Listings
Safety
Recalls
Recalls
Odometer
Check
Check
Market Price
Analysis
Analysis
What Problems Does the 1991 Mercedes-Benz S-Class Have?
The 1991 Mercedes-Benz S-Class, particularly the W140 generation, is known for its robust construction but also for certain electronic and mechanical gremlins that can surface with age. One of the most frequently reported issues revolves around the extensive use of vacuum-operated systems for door locks, trunk latches, and even seat adjustment. Leaks in these systems can lead to intermittent or complete failure of these functions, often diagnosed by a hissing sound. The climate control system is another area prone to problems, with failing blower motor resistors, temperature sensors, and HVAC control units causing erratic heating and cooling. Window regulators are also notorious for failing, often due to the weight of the dual-pane glass. Another common concern is the ABS (Anti-lock Braking System) warning light, which can indicate issues with wheel speed sensors, the ABS control module, or the hydraulic unit. Older wiring harnesses, especially those using biodegradable insulation on some components, can degrade and cause intermittent electrical faults. The fuel pump, fuel level senders, and catalytic converters can also require replacement on higher-mileage examples. While specific model year recalls for this particular year are not broadly documented as widespread critical failures, general maintenance and component wear are the primary long-term reliability concerns. The complexity of the vehicle means that even minor issues can be costly to diagnose and repair, requiring specialized knowledge and tools. For instance, the self-leveling suspension found on some models can develop leaks in the hydraulic lines or spheres. The V12 engine, while smooth and powerful, can be particularly expensive to maintain due to the sheer number of components and specialized servicing required.
How long will the 1991 Mercedes-Benz S-Class last?
With diligent and consistent maintenance, a 1991 Mercedes-Benz S-Class can reliably serve owners for well over 200,000 miles, and many examples have surpassed 300,000 miles. These vehicles were engineered with longevity in mind, utilizing robust components and high-quality materials. However, their long-term durability is highly dependent on maintenance habits. Neglected vehicles, especially those exposed to harsh climates or subjected to infrequent servicing, can exhibit accelerated wear in areas like suspension, electronics, and the powertrain. The strong points are the durable engines and transmissions, which can last for hundreds of thousands of miles if properly cared for. Conversely, the electrical systems and complex vacuum components represent potential weaknesses that can manifest over time, requiring attention and investment to maintain optimal function.
What Technology & Safety Features are Included?
The 1991 Mercedes-Benz S-Class was a technological marvel for its time, pushing the boundaries of automotive innovation. Built-in tech included a sophisticated automatic climate control system, which maintained cabin temperature regardless of external conditions. Power-adjustable front seats with memory functions were standard, offering personalized comfort. The standard sound system was typically a high-quality unit, with optional upgrades to premium Bose systems for enhanced audio. Driver-assistance features were limited by today's standards but included cruise control and ABS (Anti-lock Braking System) as standard. Traction control was also available on some models. Safety was a paramount concern, with a robust body structure designed for crumple zones. Dual airbags for the driver and front passenger were present. The vehicle featured dual-pane acoustic glass, significantly reducing road noise and contributing to a serene cabin experience. Other safety enhancements included automatic seatbelt pre-tensioners. Crash-test ratings for this era are not as standardized or readily available as modern NHTSA or Euro NCAP ratings. However, Mercedes-Benz consistently prioritized safety, and the S-Class was generally considered one of the safest vehicles of its generation, designed to offer exceptional occupant protection. Optional features included heated front and rear seats, power-adjustable rear seats, a power tilt/telescope steering wheel, rain-sensing wipers, and even a heated windshield. The advanced engineering and extensive feature set positioned the S-Class as a leader in luxury and safety technology for the early 1990s.
What Colors Options are Available?
We’re working on this section!
In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
1991 Mercedes-Benz S-Class Prices and Market Value
When new, the 1991 Mercedes-Benz S-Class commanded a substantial price, with base models starting in the high $50,000s and reaching upwards of $100,000 for V12 variants. Depreciation was significant in the first decade of ownership, typical for luxury vehicles. However, current used market prices for well-maintained examples of the 1991 S-Class range broadly from $3,000 to $15,000 or more, depending heavily on condition, mileage, and specific trim. Factors affecting resale value include the availability of comprehensive maintenance records, rust-free condition, low mileage, and the presence of desirable optional features. Rarer engine options, like the V12, can command higher prices among enthusiasts. These cars have largely moved past their steep depreciation curve and are now considered classic luxury investments.
1991 Mercedes-Benz S-Class Cost of Ownership
Owning a 1991 Mercedes-Benz S-Class is generally costly. Insurance premiums will be higher than average due to its luxury status and repair costs. Fuel economy, particularly for V8 and V12 engines, is poor, contributing significantly to running expenses. Maintenance can be expensive, requiring specialized knowledge and parts. Repairs, especially for the complex electronics or vacuum systems, are notoriously costly. While the initial purchase price has depreciated significantly, the ongoing costs of ownership make it a more expensive proposition than many modern sedans. It is not an economical vehicle to own.
1991 Mercedes-Benz S-Class Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
23.80 gallons
City Mileage
14 miles/gallon
Highway Mileage
17 miles/gallon
1991 Mercedes-Benz S-Class Safety Rating
NHTSA
IIHS
1991 Mercedes-Benz S-Class Warranty
Basic
Original warranty
0 months / No data
Estimated remaining
Expired
Powertrain
Original warranty
0 months / No data
Estimated remaining
Expired
Rust
Original warranty
0 months / No data
Estimated remaining
Expired
1991 Mercedes-Benz S-Class Insurance
Insurance for a 1991 Mercedes-Benz S-Class is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 1991 Mercedes-Benz S-Class Compare to Other Sedan?
The 1991 Mercedes-Benz S-Class (W140) competed against other top-tier luxury sedans of its era, including the BMW 7 Series (E32) and Lexus LS 400 (first generation). In terms of performance, the S-Class offered a range of potent engines, including a V12, giving it an edge in raw power and refinement over many competitors, though the BMW 750iL was a close contender. The Lexus LS 400 offered a quieter and arguably more refined V8 experience, with exceptional build quality. Feature-wise, the S-Class was at the forefront with innovations like dual-pane glass, power closing doors, and advanced climate control, often exceeding rivals in technological offerings, though the LS 400 also packed numerous luxury amenities. Reliability is where perceptions can differ. While Mercedes-Benz built these cars robustly, the sheer complexity of the S-Class's electronics and vacuum systems made it more prone to costly, age-related issues than the simpler, yet equally luxurious, Lexus LS 400, which quickly earned a reputation for bulletproof reliability. The BMW 7 Series was also complex but often viewed as having a slightly more driver-focused appeal. Price-wise, the S-Class was positioned at the premium end, often more expensive than the BMW and significantly more so than the initial offerings from Lexus, which aimed to undercut German luxury pricing. For those prioritizing ultimate luxury and cutting-edge tech from the era, the S-Class is a strong contender. However, if long-term reliability and lower maintenance costs are paramount, the Lexus LS 400 is a superior alternative. The BMW 7 Series offers a compelling blend of performance and luxury, often with a sportier driving dynamic than the S-Class.
Final Verdict: Is the 1991 Mercedes-Benz S-Class a Good Sedan?
The 1991 Mercedes-Benz S-Class is ideal for the classic car enthusiast or collector who appreciates engineering excellence, opulent comfort, and a significant piece of automotive history. It's worth buying for those with a passion for luxury sedans of the 90s and the resources to properly maintain it. Buying one is recommended only in the used market, as new examples are unavailable. Specific trims like the S500 or S600 offer a more potent and luxurious experience. Crucially, it's best suited for individuals who can afford potential repair bills and have access to knowledgeable mechanics, as its complexity can make it costly for the uninitiated. A thoroughly inspected, well-documented example is key to a positive ownership experience.
Cathleen V
Cathleen is an exceptional freelance writer covering hot topics in the automotive world from a gearhead's perspective. Her articles delve into various aspects of automotive technology and history, offering readers detailed insights into engine performance, reliability, and maintenance. Through her engaging and informative writing, Cathleen provides valuable information to automotive enthusiasts and consumers alike, helping them make informed decisions about vehicle maintenance and purchases.