TRW Automotive AfterMarket DF4916S Brake Disc

TRW Automotive AfterMarket DF4916S Brake Disc

The TRW DF4916S is a high‑performance brake disc engineered for the rear axle of premium vehicles, particularly those in the Mercedes‑Benz S‑Class and SL series. Designed with advanced materials and precision manufacturing, this component delivers exceptional stopping power, durability, and thermal stability under demanding driving conditions.

Key Technical Specifications

• Diameter: 320 mm (12.6 in)
• Thickness: 24 mm (0.94 in)
• Material Composition: High‑carbon steel alloy with a carbon‑rich surface treatment for enhanced heat dissipation.
• Ventilation: Dual‑channel drilled and slotted design to promote airflow, reduce brake fade, and maintain consistent braking performance.
• Weight: Approximately 3.5 kg (7.7 lb) per disc, optimized for low rotational inertia.
• Compatibility: Fits rear axles of Mercedes‑Benz S‑Class models (W221, V221, C216, W222, V222, X222), SL series (R230, C216, V221, V222, X222), and other vehicles requiring a 320 mm disc.

Design Features & Performance Benefits

The DF4916S incorporates several engineering advancements that set it apart from standard aftermarket options:

• High‑Carbon Surface Treatment: The carbonized layer increases the disc’s resistance to thermal cracking and reduces wear on brake pads.
• Optimized Ventilation Geometry: Dual channels allow hot gases to escape efficiently, keeping the braking surface cooler during prolonged use.
• Precision Machining: Tight tolerances ensure a perfect fit with OEM calipers and rotors, minimizing vibration and noise.
• Lightweight Construction: Reduced mass improves acceleration response and reduces unsprung weight, contributing to better handling dynamics.

Installation & Maintenance Guidelines

Installing the DF4916S is straightforward for technicians familiar with rear brake systems. Key steps include:

1. Remove existing rotors and clean the hub surface to eliminate debris or corrosion.
2. Align the new disc with the caliper mounting points, ensuring proper clearance for the pads.
3. Torque all fasteners to manufacturer specifications using a calibrated torque wrench.
4. Perform a brake fluid flush and bleed procedure to remove air from the hydraulic system.

Routine maintenance involves inspecting pad wear, checking rotor surface integrity, and ensuring that caliper pistons remain free of debris. The DF4916S’s robust construction typically extends the service life of accompanying pads by up to 20% compared with standard discs.

Applications & Vehicle Compatibility

The disc is specifically engineered for:

• Mercedes‑Benz S‑Class (W221, V221, C216, W222, V222, X222)
• Mercedes‑Benz SL Series (R230, C216, V221, V222, X222)
• Other high‑performance vehicles that require a 320 mm rear rotor with dual ventilation.

Its modular design allows for easy replacement of single or paired discs, making it suitable for both performance upgrades and routine replacements.

Quality Assurance & Manufacturing Standards

The DF4916S is produced in a controlled environment that adheres to strict quality protocols:

• ISO 9001 Certification: Ensures consistent manufacturing processes and defect minimization.
• Material Traceability: Each batch of steel alloy is tracked from supplier to final product, guaranteeing material integrity.
• Heat Treatment Verification: Post‑manufacturing heat treatment cycles are logged and verified through metallurgical testing.

Performance Testing & Validation

Extensive laboratory and on‑road tests confirm the disc’s capabilities:

• Brake Fade Resistance: Maintains consistent stopping power after repeated high‑speed braking cycles.
• Thermal Stability: Withstands temperatures exceeding 600 °C without structural deformation.
• Noise & Vibration Reduction: Engineered to minimize brake squeal and rotor noise under various driving conditions.

Conclusion

The TRW DF4916S Brake Disc represents a blend of advanced materials, precision engineering, and rigorous quality control. Its high‑carbon composition, dual ventilation, and compatibility with elite vehicle models make it an ideal choice for drivers seeking reliable, high‑performance braking solutions without compromising on safety or durability.