The Mercedes SL500 is a stunning roadster, a blend of performance and luxury that truly embodies automotive excellence. This particular model, finished in elegant Aegean Blue Metallic, boasts a robust 302 horsepower engine with 339 lb-ft of torque. Equipped with the AMG Sport Package, it offers a taste of AMG performance without being the full-fledged AMG SL55. Slipping into the driver’s seat of an Sl500 Benz, you immediately sense a harmony of design and engineering – everything simply feels “right”.
The owner of this meticulously maintained SL500 Benz contacted us to refresh their prized possession. Despite having only 7,000 miles, this garage-kept beauty was due for a comprehensive detailing session. Upon inspection, we noted the paintwork was remarkably swirl-free, a testament to careful ownership. However, it presented its own set of challenges: a collection of scratches and stubborn water spots marring the horizontal surfaces, alongside a significant accumulation of brake dust on the wheels and general exterior grime.
Recognizing that this SL500 Benz didn’t require dramatic paint correction to showcase a transformation, we decided to focus our detailing efforts on the often-overlooked nuances. Our aim was to meticulously document the smaller details, providing an educational insight into comprehensive car care for enthusiasts looking to enhance their own vehicles.
And as is our passion, we captured a wealth of photos throughout the process – we apologize in advance for the extensive visual journey! We began, as is often best, with the interior.
The SL500 Benz cockpit was in commendable condition, appearing relatively clean at first glance. Our strategy was to execute a thorough cleanse of the dark interior, followed by applying a protective layer to all surfaces. After diligently vacuuming the carpets and floor mats, we prepared a mild solution of Woolite and water. Using a microfiber (MF) towel, we methodically cleaned every interior surface. Experience with convertibles, especially those with darker interiors, has taught us that even seemingly clean surfaces can harbor significant dirt and contaminants. Our expectations were confirmed as we proceeded.
Following the broad surface cleaning, we meticulously addressed all cracks and crevices to extract any lingering debris.
The start/stop button atop the gear shift knob is a notable feature in this SL500 Benz.
Ventilation systems often accumulate dust and grime, so cleaning the vents was a necessary step.
The driver’s seat, particularly the left bolster, invariably bears the brunt of ingress and egress. Despite the SL500 Benz’s low mileage, this seat was no exception. We observed dirt and slight dye transfer from denim, requiring careful attention.
For this task, we employed an All-Purpose Cleaner (APC) diluted to a 10:1 ratio. Gently agitating the area with a dedicated leather brush effectively lifted the embedded grime.
Post-cleaning, we treated the leather, and all other leather surfaces within the SL500 Benz interior, with Optimum Protectant Plus. This product was chosen for its superior UV protection and non-greasy, natural-looking finish. It enhances the leather’s appearance, restoring a factory-fresh look without unwanted shine.
Door shuts, often overlooked, also accumulate dirt, dust, and general road grime. The SL500 Benz was no exception.
We meticulously cleaned them using Optimum No Rinse (ONR) diluted as a Quick Detailer (QD) in a spray bottle.
Finally, the pedals – subjected to constant contact with footwear – demanded attention. We addressed these using APC and a detailing brush, followed by a wipe-down with a damp cloth to remove any residue. Careful product selection is paramount here; the goal is a clean surface, not a slippery one. (And yes, we did spot and address that smudge above the pedals!).
With the interior revitalized, we turned our focus to the exterior of the SL500 Benz. We captured some compelling before-and-after shots in certain areas, so we’ll navigate through the process somewhat dynamically.
As these initial photos clearly illustrate, this SL500 Benz was undeniably in need of a comprehensive exterior cleaning.
The wheel wells were heavily soiled and presented access challenges.
A notable feature of the SL500 Benz is its height-adjustable suspension, offering three settings. This is particularly useful for navigating steep inclines without scraping the undercarriage. Here, we utilized the fully raised setting to gain better access to the wheel wells and side skirts during the cleaning and polishing phases.
Wheel cleaning is always our initial step on the exterior. As you can see, the SL500 Benz wheels presented a significant task.
We started by applying P21S Wheel Gel to the rims and calipers, working one side of the car at a time and allowing it to dwell for a few minutes. While the wheel gel worked, we sprayed the tires and wheel wells with P21S Total Auto Wash (TAW).
Each wheel and wheel well required approximately 10-12 minutes of meticulous cleaning due to the heavy accumulation of dirt and brake dust. We used various brushes to ensure thorough cleaning within the wheel well areas.
Upon rinsing, we observed water beading, indicating the presence of existing wax or sealants. These needed to be removed prior to polishing to prevent interference with the polishing process. To facilitate this, we used Chemical Guys Wash & Clear at a paint prep ratio (2oz/gallon). We utilized a Gilmour foam gun to pre-soak the SL500 Benz, then prepared our two-bucket wash system, incorporating CGWC into one bucket. Given the heavy contamination, we diligently cleaned our wash mitt in the rinse bucket with a Grit Guard after each section to prevent reintroducing dirt.
Following the thorough wash, we clayed the SL500 Benz using Optimum Instant Detailer as a clay lubricant – a product known for its slickness, crucial to prevent marring during claying. We found significant contamination on both horizontal and vertical surfaces, necessitating a comprehensive claying process. This step, though time-consuming, was essential to achieve a smooth surface ready for polishing.
After claying and contaminant removal, we performed a second foam wash to ensure the SL500 Benz surface was impeccably clean and prepared for polishing.
As mentioned earlier, the paint was largely swirl-free but exhibited random scratches and water spot etching, particularly on horizontal panels. Our chosen approach was a one-step polish using Menzerna PO203. We’ve found PO203 to be exceptionally versatile, offering effective cutting power when paired with the correct pad, while also delivering a finish ready for Last Step Products (LSP). However, we recommend thorough IPA wipedowns afterward to guarantee no fillers or masking effects are present. After conducting our standard test section, PO203 proved to be the ideal solution for this SL500 Benz.
Detailing extends to often-missed areas like the underside of side skirts. For these tighter areas, we switched to a 4” white spot buff pad. An exercise mat provides welcome cushioning when working in low areas!
The result after PO203S polishing, before LSP application.
The SL500 Benz‘s glass roof also suffered from heavy water spotting. We addressed this with machine polishing using a Porter Cable (PC) polisher, a white polishing pad, and Optimum Poli-Seal. This combination provides sufficient cut to refine the glass, leaving a slick, protected finish lasting for months.
The Aegean Blue Metallic paint is captivating, shifting between grey and light blue hues depending on the light. This macro shot reveals the beautiful metallic flake within the paint.
With polishing complete, we performed an IPA wipedown followed by an Optimum Instant Detailer wipedown. The finish was now ready for sealant application. Optimum Opti-Seal is our preferred protectant due to its ease of application and natural look, avoiding the artificial “plastic” appearance some sealants impart. Its durability is also impressive, proven through harsh Midwest winters.
We applied Opti-Seal using a red applicator pad, and after curing, buffed it to perfection with a soft MF towel and a light mist of Optimum Instant Detailer.
To further enhance the finish, we hand-applied P21S 100% wax using a separate red applicator pad. While not the most durable wax, P21S 100% delivers an exceptional finish, applying and removing effortlessly with minimal cure time.
Another often-neglected area is the underside of the trunk lid, above the license plate. This SL500 Benz revealed about three years’ worth of accumulated grime.
And after detailing:
Even the emblems exhibited significant buildup, beyond simple surface dirt.
We polished the emblems using a PC polisher, a white pad, and Menzerna 106FA polish (all-in-one products like Optimum Poli-Seal or Klasse AIO are also excellent choices for emblems).
Mercedes badge before:
Mercedes badge after:
The exhaust tips were also heavily tarnished. We first cleaned them with P21S TAW and 0000 steel wool, followed by polishing to restore their shine.
Mercedes SL500 exhaust tips after:
Ready for the after-shots? Here are some initial images captured inside the garage. The weather was cloudy and rainy, and the owner graciously allowed us to keep the SL500 Benz a few extra days until the sun emerged.
While this shot focuses primarily on the wheel, it showcases the meticulous detail achieved.
And some atmospheric indoor shots:
Finally, the sun emerged, allowing us to capture more images as promised. This Aegean Blue Metallic hue can be challenging to photograph for extreme reflections, but we strived to capture its brilliance.
Flawless trunk lid reflection:
Impeccable side panel reflection:
Hood reflection perfection:
Reflection and “wetness” captured in this shot:
And finally, the emblem, fully restored:
Total time invested in this meticulous SL500 Benz detailing: 11 hours.
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