Mercedes-Benz EQS Wheel Repair & Painting Review

Mercedes-Benz EQS Wheel Repair: Restoring 21-Inch Wheels to Pristine Condition

The owner of this Mercedes-Benz EQS brought in their 21-inch wheels, which had sustained significant damage including deep scratches and curb rash. While wheel replacement is an option, the high cost of genuine EQS wheels often makes professional repair a more attractive solution. This review details a comprehensive wheel repair and painting process, including laser welding, powder coating, and diamond cutting, to restore the wheels to a like-new finish. The service cost for four wheels ranged from ₩2.5 million to ₩3.5 million, with a turnaround time of approximately 7-10 days.

The Wheel Restoration Process: From Damage Assessment to Diamond Cutting

The initial step involved a detailed inspection of the 21-inch wheels to assess the extent of the damage. Given the size of these wheels, they are particularly susceptible to road damage. The inspection identified deep gouges and chipped edges, necessitating more than just a superficial repair. The workshop differentiated between surface scratches and deeper indentations, which guided the repair strategy. For the EQS's wheels, the presence of significant depth in the damage required advanced techniques.

The restoration began with stripping the existing paint and coatings down to the bare aluminum. This process, known as 'stripping' or 'delacquering,' ensures a clean surface for repair and repainting. Following the stripping, the damaged areas were meticulously examined. For indentations exceeding 1mm in depth, aluminum laser welding was employed. This precise technique uses a laser to melt and fill the damaged areas, minimizing heat distortion, which is crucial for delicate wheel structures. The laser welding process typically operates between 500-800℃, with careful control over cooling rates to prevent warping.

After laser welding, the repaired areas were carefully ground down to be perfectly flush with the wheel's original surface. This stage requires significant expertise to remove excess material without compromising the wheel's integrity. The focus is on achieving a smooth, seamless finish.

Powder Coating and Diamond Cutting for a Factory Finish

Once the structural repairs were complete, the wheels moved to the painting stage. Instead of conventional liquid paint, a high-durability powder coating was applied. Powder coating involves electrostatically applying powdered paint, which is then cured in an oven, resulting in a tougher, more chip-resistant finish ideal for wheels. For this EQS, a base layer of black powder coat was applied. Depending on the desired finish, multiple layers can be applied. The curing process for the powder coat takes about 2-3 hours.

The final and most intricate step was the diamond cutting. This process involves using a specialized lathe to precisely shave a thin layer off the wheel's face, revealing the polished aluminum beneath. This creates a sharp, reflective, machined look that mimics the original factory finish. The combination of laser welding for structural integrity, durable powder coating for protection, and diamond cutting for aesthetics results in wheels that look brand new.

Key Takeaways:

• Deep wheel damage can be effectively repaired using laser welding and diamond cutting.
• Powder coating offers superior durability compared to traditional paint for wheels.
• The cost for comprehensive repair of four 21-inch wheels can range significantly, as seen with the ₩2.5M-₩3.5M price point for this EQS.
• Professional wheel repair can be a cost-effective alternative to replacement, especially for high-value vehicles.