CARFIX

Mercedes-Benz S-Class S 420 CDI (2006–2009)

The Mercedes-Benz S-CLASS (W221 generation) from 2006 to 2009 stands as a symbol of unparalleled luxury and advanced technology, setting the benchmark for premium sedans. Frequently seen navigating the vibrant streets of cities like Auckland, these elegant vehicles merge comfort, performance, and sophistication, making every ride memorable. However, the joy of owning a luxury car comes with the responsibility of diligent maintenance to ensure its longevity and peak performance. By understanding its intricacies and regularly addressing potential issues, you can keep the S-Class radiating its prestigious allure.

Parts for the Mercedes-Benz S-Class S 420 CDI

Known issues

Common issues to watch out for include air suspension problems (leaks, compressor failure), electronic gremlins (sensor malfunctions, infotainment glitches), oil leaks (especially around the valve covers and rear main seal), and wear in the suspension components. The air suspension is a common issue so budget for that. Also, check for proper operation of all electronic features.

WOF tips

WOF inspections should pay close attention to brake performance (ensure even braking and no ABS faults), tyre condition (uneven wear can indicate suspension issues), lighting (check all bulbs and ensure they are functioning correctly), and the overall structural integrity (look for rust, particularly around the undercarriage). Air suspension needs to be in good working order.

About the Mercedes-Benz S-Class S 420 CDI

The S-Class S 420 CDI offers a powerhouse experience with a range of engines, including the smooth-running V6 and robust V8 options. Its advanced features, such as air suspension and a sophisticated infotainment system, promise to envelop you in luxury. Given their age, it's paramount to perform routine inspections, particularly on components prone to wear. Common replacements include brake parts, especially rotors and pads, along with essential engine maintenance items like oil filters and air filters, making regular service intervals a must. The air suspension, a noteworthy feature, can present issues, so a good test is necessary; budgeting for potential repairs will help in maintaining performance without surprises along the way.

The cooling system requires attention around 150,000 km, particularly inspecting the water pump, thermostat, and radiator hoses. Regular checks here can prevent complications down the line and keep your vehicle running smoothly. [This naturally links to /shop/cooling] Additionally, replacing worn brake pads and rotors will ensure optimal safety and is critical for passing your Warrant of Fitness. Our brake service packs have everything you need for complete peace of mind on the road. [Explore more under /shop/braking] Finally, don’t overlook the importance of filtration; changing the air and oil filters regularly plays an essential role in extending the engine's life and maintaining efficiency. [Find the products at /shop/filtration]