The fourth-generation Mercedes-Benz SL (R230), produced from 2006 to 2012, is a sophisticated grand tourer that blends power and elegance. With its retractable hardtop, luxurious interior, and powerful engines, it aimed to deliver a quintessential Mercedes experience. However, like any complex machine, it's essential to be aware of its potential pitfalls, especially when considering one for New Zealand roads. This report focuses on the nuances of owning and maintaining a 2006-2012 SL in NZ, paying attention to our unique conditions and WOF requirements.
Common issues include failures of the Active Body Control (ABC) suspension system (if equipped), including pump failures, leaks in the hydraulic lines, and strut issues. The retractable hardtop can experience problems with the hydraulics, sensors, and motors. Electronic gremlins are not uncommon, affecting various systems like the COMAND infotainment system and driver aids. Oil leaks, particularly from the valve cover gaskets and rear main seal, are also common. Rust can be a concern, especially on imported vehicles, around the wheel arches, and underbody.
During a WOF inspection, pay close attention to the following:
• Suspension: Check for leaks from the ABC suspension struts (if equipped) and ensure the system operates correctly (no sagging or warning lights). General suspension components like ball joints and bushings also need careful inspection.
• Brakes: Ensure brake rotors are within thickness specifications. Check the condition of brake lines and hoses.
• Tyres: Tyre wear is a standard check, but ensure tyres are correctly rated for the vehicle's performance capabilities.
• Lights: Ensure all lights, including the retractable roof brake light, are functioning.
• Rust: Check for rust, particularly around the wheel arches, sills, and underbody. This is especially important for imported vehicles.
• Fluid Leaks: Evidence of excessive oil or fluid leaks will result in a WOF failure.
The 2006-2012 SL lineup offered a range of engine options, from the relatively frugal V6 to potent V8s and AMG's monstrous supercharged versions. Performance is plentiful across the range. Handling is good, but the SL is more about comfortable cruising than ultimate track performance. The electro-hydraulic retractable hardtop is a complex system and requires regular maintenance to prevent issues. Be sure to check for smooth operation and any signs of leaks. The Active Body Control (ABC) suspension system, available as an option, provides incredible ride quality and handling, but can be a costly area for repairs if neglected.
In New Zealand, the SL's luxurious features and inherent sophistication make it an appealing choice. However, its age means that careful inspection and preventative maintenance are crucial. Imported models from Japan and the UK are common, so pay close attention to rust, particularly in coastal areas.