The Mercedes-Benz SL600, with its powerful V12 engine, represents the pinnacle of luxury and performance in the SL lineup. However, whispers of high maintenance costs and potential unreliability often precede discussions about owning these magnificent machines, especially on forums and among enthusiasts. One seasoned Mercedes owner, Mahunt on Benzworld, aptly noted that V12 models operate on a different plane when it comes to upkeep compared to their V8 and I6 counterparts, citing more complex systems and a unique drivetrain. But does this inherent complexity automatically translate to an ownership experience fraught with headaches?
My personal journey with Mercedes SL models offers a contrasting perspective. Prior to experiencing V12 ownership, I owned a ’98 SL500, considered by many as a desirable year due to its M119 engine and 722.6 transmission. Despite its lauded status and a seemingly reasonable 67,000 miles on the odometer when purchased, my four years and 24,000 miles with the SL500 were marked by a persistent feeling of something being “not quite right.” Despite regular shop visits, achieving peak running condition felt elusive, and a general sense of weariness pervaded the ownership experience.
Seeking a different experience, I transitioned to a ’99 SL600 with 55,000 miles. Crucially, this purchase was preceded by obtaining a comprehensive dealer service history, meticulously documenting Mercedes-Benz dealership maintenance up to the 50,000-mile mark. Fast forward 18 months and 7,000 miles, and my SL600 has visited the shop precisely once – for a routine oil change. This excludes a pre-purchase inspection that addressed minor maintenance items deferred between 50,000 and 55,000 miles. In stark contrast to my SL500 experience, the SL600 feels remarkably fresh and robust, performing as if it just rolled off the factory floor. Any imperfections are purely cosmetic, with the mechanical and structural integrity appearing flawless.
This is, admittedly, a single anecdote comparing two vehicles. Yet, it underscores a critical point: meticulous prior care and maintenance history can profoundly impact the ownership experience, particularly with complex vehicles like the Sl600 Mercedes. While a V8 SL500 might inherently present a lower long-term maintenance profile, a well-maintained SL600 V12 can defy expectations. After a year and a half of enjoying my V12, driving it with enthusiasm every week or two, it has proven to be surprisingly dependable. In fact, it has presented fewer issues than a far simpler 2001 Honda Prelude I previously owned.
The key takeaway for anyone considering an SL600 Mercedes is to prioritize finding a vehicle with a demonstrably thorough maintenance history. While the potential for higher running costs with a V12 remains a valid consideration, a well-cared-for example might mitigate those concerns significantly. And the sheer thrill of the V12 experience, especially as the revs climb past 4,700 rpm, not to mention the distinctive V12 engine note, makes the pursuit of a well-maintained SL600 a risk potentially well worth taking.
