The Mercedes-Benz 240D, a stalwart of the W123 chassis, is renowned for its longevity, reliability, and fuel efficiency. Choosing the right year can significantly impact your ownership experience, as improvements and occasional regressions occurred throughout its production run. This guide will delve into the best years for the 240D and highlight some models to approach with caution, ensuring you find the most dependable example of this classic diesel.

Mercedes-Benz 240D: Model Year Overview

Model Year Key Features/Improvements Potential Issues/Considerations
1974 Introduction of the 240D; mechanically simple and robust. Early production quirks; potentially higher mileage and wear.
1975 Minor refinements to engine and interior. Similar to 1974, potential for age-related issues.
1976 Improved door seals and minor interior upgrades. Still prone to rust in certain climates.
1977 Introduction of improved climate control system. No major issues reported.
1978 Enhanced interior trim and slight engine tweaks for better drivability. No major issues reported.
1979 Last year for the "early" W123 body style; considered highly desirable by enthusiasts. Parts availability for some unique features may be limited.
1980 Major facelift: redesigned bumpers, interior, and updated suspension. Introduction of vacuum-operated central locking, which can be problematic.
1981 Further refinements to the interior and slight improvements to fuel efficiency. Vacuum-operated central locking issues may persist.
1982 Minor cosmetic updates. No major issues reported.
1983 Final year of production for the 240D. Generally considered a good year. Potential for higher prices due to being the last year.

Detailed Explanations

1974: Introduction of the 240D; mechanically simple and robust.

The 1974 model marked the introduction of the 240D, powered by the OM616 2.4-liter diesel engine. This year is praised for its mechanical simplicity, making it relatively easy to maintain and repair. Its robust design contributes to its longevity, a key characteristic of the W123.

Early Production Quirks; potentially higher mileage and wear.

Being an early production model, the 1974 240D might exhibit minor quirks and issues that were ironed out in later years. Given its age, finding one with low mileage and minimal wear can be challenging, requiring a thorough inspection.

1975: Minor refinements to engine and interior.

The 1975 model year saw subtle improvements to both the engine and interior. These refinements aimed to enhance overall performance and comfort, making it slightly more desirable than the initial 1974 model.

Similar to 1974, potential for age-related issues.

Like the 1974 model, the 1975 240D is susceptible to age-related issues such as rust, worn suspension components, and deteriorated rubber parts. A pre-purchase inspection is crucial.

1976: Improved door seals and minor interior upgrades.

In 1976, Mercedes-Benz addressed some of the initial issues with the W123, notably improving door seals to reduce wind noise and water leaks. Minor interior upgrades further enhanced the driving experience.

Still prone to rust in certain climates.

Despite the improvements, the 1976 240D, like its predecessors, remains vulnerable to rust, especially in regions with harsh winters or coastal climates. Regular maintenance and rust prevention measures are essential.

1977: Introduction of improved climate control system.

A significant upgrade for the 1977 model was the introduction of an improved climate control system. This made the car more comfortable to drive in varying weather conditions.

No major issues reported.

The 1977 240D is generally considered a reliable model year with no widespread or significant issues reported.

1978: Enhanced interior trim and slight engine tweaks for better drivability.

The 1978 model received enhanced interior trim, improving the overall aesthetic appeal. Slight engine tweaks were also implemented to enhance drivability and responsiveness.

No major issues reported.

Similar to the 1977 model, the 1978 240D is known for its reliability and lack of major issues.

1979: Last year for the "early" W123 body style; considered highly desirable by enthusiasts.

The 1979 model marks the final year for the "early" W123 body style, characterized by its smaller bumpers and unique interior features. This year is highly sought after by enthusiasts for its classic design and relative simplicity.

Parts availability for some unique features may be limited.

Due to its unique features, parts availability for certain components specific to the 1979 model might be limited, potentially increasing maintenance costs.

1980: Major facelift: redesigned bumpers, interior, and updated suspension.

The 1980 model year brought a significant facelift to the W123, including redesigned bumpers, a revised interior, and updated suspension components. These changes gave the car a more modern appearance and improved handling.

Introduction of vacuum-operated central locking, which can be problematic.

A notable change in the 1980 model was the introduction of a vacuum-operated central locking system. This system is known to be problematic, often requiring repairs due to leaks and malfunctions.

1981: Further refinements to the interior and slight improvements to fuel efficiency.

The 1981 model saw further refinements to the interior, enhancing comfort and aesthetics. Slight improvements were also made to fuel efficiency, making it a more economical choice.

Vacuum-operated central locking issues may persist.

The vacuum-operated central locking system continued to be a potential source of problems in the 1981 model, requiring regular maintenance and repairs.

1982: Minor cosmetic updates.

The 1982 model year brought only minor cosmetic updates, with no significant mechanical changes.

No major issues reported.

The 1982 240D is generally considered a reliable year with no significant problems reported.

1983: Final year of production for the 240D. Generally considered a good year.

The 1983 model marks the final year of production for the 240D, making it a potentially desirable collector's item. It's generally considered a good year, benefiting from all the improvements made throughout the production run.

Potential for higher prices due to being the last year.

Due to its status as the final production year, the 1983 240D might command higher prices compared to earlier models.

Frequently Asked Questions

Which year of the 240D is the most reliable?

Generally, the 1977-1979 models are considered among the most reliable due to their lack of major issues and the absence of the problematic vacuum-operated central locking system found in later models.

Are the early or late models of the 240D better?

It depends on your priorities. Early models (1974-1979) are mechanically simpler and highly desirable by enthusiasts, while later models (1980-1983) offer a more modern look and some updated features, but with potential issues like the vacuum-operated central locking.

What are the common problems with the Mercedes-Benz 240D?

Common problems include rust, worn suspension components, engine wear (especially in high-mileage examples), and issues with the vacuum-operated central locking system in later models.

Is the 240D a good daily driver?

Yes, the 240D can be a good daily driver if properly maintained. Its fuel efficiency and reliability make it a practical choice, but its slow acceleration might not suit everyone.

How much does it cost to maintain a 240D?

Maintenance costs can vary depending on the car's condition and your location. Regular maintenance items like oil changes and filter replacements are relatively affordable, but major repairs can be costly.

Conclusion

Ultimately, the best year for a Mercedes-Benz 240D depends on your individual needs and preferences. Models from 1977-1979 generally offer the best combination of reliability and simplicity, while the 1983 model holds appeal as the final production year. Prioritize thorough inspection and maintenance records to ensure you find a well-preserved example that will provide years of dependable service.