Drilled Rear Brake Disc for MERCEDES-BENZ ECE R90

Precision-engineered by Chinese manufacturers to Mercedes-Benz standards, these drilled rear brake discs have obtained ECE R90 EU certification. Custom-developed for Mercedes-Benz rear braking systems, they ensure precise fitment for mainstream models. Developed strictly adhering to Mercedes-Benz original equipment (OE) specifications, the product features mounting holes and locating shoulders that perfectly match brake calipers and wheels, enabling direct installation without modification. It is compatible with Mercedes-Benz ESP electronic stability control and AEB automatic emergency braking systems, suitable for diverse scenarios including luxury business commuting, long-distance cruising, and family travel.

Constructed from HT250 high-strength gray cast iron, the disc body is formed through integral casting and isothermal quenching processes. Disc hardness is stabilized at 187-241 HBS, delivering impact resistance and wear performance perfectly matched to Mercedes-Benz vehicle dynamics. The core incorporates a drilled structure with dual-spiral ventilation chambers. The rotor features 48 evenly distributed cooling holes and 36 equidistant air channels, boosting heat dissipation efficiency by 40% compared to standard brake discs. During continuous braking, thermal fade suppression exceeds 35%. The drilled design rapidly evacuates brake dust and moisture, optimizing friction surface contact and maintaining a stable friction coefficient between 0.38 and 0.42. Features a cathodic electrophoretic anti-corrosion coating that forms a dense protective layer. Withstands 500 hours of salt spray testing without significant corrosion, making it suitable for humid, coastal, and other highly corrosive environments.

Material & Metallurgy

Forged from Gray Iron and High Carbon (HC), this disc strictly conforms to G3000, GG20, and GG15HC (DIN, SAE) metallurgical standards. The high carbon matrix significantly enhances thermal conductivity and heat capacity. The drilled and slotted structure actively vents hot gases and brake dust, drastically reducing the risk of brake fade and thermal judder during aggressive or continuous rear-axle braking, ensuring a consistent pedal feel.

Precision Machining

Every brake disc undergoes expert turning and grinding processes. We strictly control Disc Thickness Variation (DTV) and lateral runout. The precision-machined flat friction surface, combined with the slotted design, eliminates high-speed steering wheel vibration and braking pulsation, guaranteeing OEM-level installation accuracy and a quiet, refined ride.

Anti-Rust & Aesthetics

The non-friction areas (center hat and outer edge) feature advanced anti-corrosion treatments: Coated, Painted, Oiled, or Zinc Dust. The premium Coated finish (highlighted in the title and main image) provides maximum resistance against coastal humidity and winter road salt, preventing the hub from seizing to the wheel for easy future maintenance. Visually, the drilled and slotted pattern with a coated finish delivers a clean, aggressive performance look behind open wheels.

Global Certifications & B2B Logistics

Produced under IATF16949 (Automotive Quality), ISO14001 (Environmental), and ISO45001 (Safety) systems. Fully compliant with ECE R90 (Europe) and CNAS accredited standards, ensuring seamless global market access. We support Private Label and Customized Label services. Transport packaging includes box, carton, pallet, and bulk, optimized for international sea freight (moisture-proof inner packing recommended for coated/oiled surfaces).

Installation & Storage

Replace in axle pairs with matching pads. Avoid hard braking for the first 300 km; perform moderate stops to establish an even transfer layer. Store in a dry, well-ventilated warehouse away from corrosives to protect the coated surface.

• 100% critical dimensions, runout and DTV inspection 

• Material physical and chemical inspection

• Test shear strength, compressibility, density, flatness and parallelism 

• Test performance and noise/NVH