The Mercedes Benz SL Class, particularly the R107 generation spanning from the 1970s to 1980s, holds a special allure for classic car enthusiasts. The 1985 Mercedes Benz Sl Class, often represented by the 380SL model in the US market, offers a blend of timeless design and open-top motoring. However, like any vehicle of this age, potential owners should be aware of common maintenance points and potential issues. If you’re considering adding a 1985 SL to your garage, understanding these aspects is crucial for informed ownership and enjoying the classic roadster experience.
Suspension System: Addressing the Ride and Handling
Decades of road use and, in some cases, periods of inactivity can take a toll on the suspension components of a 1985 Mercedes Benz SL Class. These cars, built with substantial engineering and materials, are not lightweight, and their suspension systems bear the brunt of this weight over time. Prospective buyers should anticipate potential needs for replacement or refurbishment of several key suspension elements. This often includes shocks, ideally with Bilstein replacements known for their quality and performance. Furthermore, subframe bushings, ball joints, and even springs might require attention to restore the car’s original ride quality and handling precision. Addressing these components ensures not only comfortable cruising but also safe and predictable handling.
Bosch CIS Fuel Injection: Navigating Cold Start and Idle Quirks
The 1985 Mercedes Benz SL Class, particularly models like the 380SL produced for the US market, utilizes the Bosch CIS (Continuous Injection System) fuel injection. While a robust system in its time, CIS can present challenges in older vehicles. Owners might encounter issues related to cold, warm, or hot starts, as well as inconsistent idle and occasional engine missing. Troubleshooting CIS can sometimes become complex and costly, with some owners investing significant sums in chasing elusive idle and starting problems. A thorough inspection of the CIS system by a knowledgeable mechanic is advisable to assess its condition and identify potential areas needing attention.
Climate Control: Decoding the Complex System
Mercedes-Benz climate control systems of this era are known for their intricate design and operational complexity. The system in a 1985 SL Class is no exception, often described as unnecessarily complicated. Owners should expect to encounter climate control issues at some point. The system’s reliance on vacuum-operated actuators, often hidden and difficult to access behind the dashboard, adds to the complexity of diagnosis and repair. A common symptom is sudden loss of heat, often traced back to a failing monovalve. Fortunately, the monovalve is a relatively inexpensive and easily replaceable component. However, diagnosing other climate control faults may require specialized knowledge and patience due to the system’s intricate vacuum circuitry.
Rust Inspection: Proactive Prevention is Key
Rust is a common concern for classic cars, and the 1985 Mercedes Benz SL Class is not entirely immune. While these cars are generally better protected than some contemporaries, age inevitably increases susceptibility to corrosion. Key areas to scrutinize for rust include the headlight buckets and the lower sections of the doors. A useful rule of thumb when assessing rust on a classic car is to multiply the visible rust by a factor of ten to estimate the extent of underlying corrosion that may require attention. Early detection and treatment of rust are crucial to preserving the structural integrity and aesthetic appeal of a 1985 SL Class.
Convertible and Hard Tops: Simple and Robust Design
One of the appealing features of the SL Class is its convertible nature, complemented by an available hardtop. The 1985 SL boasts a straightforward and mechanically sound convertible top mechanism, generally praised for its reliability. Similarly, the hardtop is well-designed and relatively easy to handle. Owners often devise homemade winch systems for convenient removal, storage, and reinstallation of the hardtop, enhancing the versatility of the SL across different seasons.
Interior Condition: Addressing Dash Cracks and Wear
The interior of a 1985 Mercedes Benz SL Class typically showcases quality materials, but age-related wear is inevitable. Dash cracks are a known issue, particularly in blue-colored dashboards, potentially due to sun exposure and material degradation over time. Prospective buyers should carefully inspect the dashboard and other interior trim for cracks, discoloration, and general wear, factoring in potential restoration costs if necessary.
Radiator Vulnerability: Plastic Filler Neck Concerns
The radiator in a 1985 SL Class can be a point of weakness, particularly concerning the plastic filler neck. These plastic components can become brittle with age and heat cycles, leading to cracks or breakage. Once the filler neck fails, repair is often challenging, and replacement with a new radiator becomes necessary. This is a known potential issue to be aware of during inspection and maintenance.
Becker Radio: A Touch of Nostalgia with Potential Drawbacks
The original radio equipment in a 1985 Mercedes Benz SL Class was often supplied by Becker. While these radios hold a certain vintage charm, they are also known for their age-related reliability issues. Owners may encounter malfunctions or choose to upgrade to more modern audio systems while preserving the car’s classic aesthetics.
In conclusion, a 1985 Mercedes Benz SL Class offers a rewarding classic car experience, blending style, and open-top enjoyment. Like any vintage vehicle, proactive maintenance and awareness of potential issues are essential for long-term enjoyment. Prior to purchase, a Pre-Purchase Inspection (PPI) conducted by a knowledgeable and independent Mercedes-Benz technician is highly recommended. This inspection should thoroughly assess the electrical, mechanical, fuel, and body systems, providing valuable insights and ensuring a sound investment in your classic SL.
