Stoptech 127.35089L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotor 127.35089L is engineered for Mercedes-Benz models including GL320, GL450, GL550, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500. Designed to enhance braking performance, this vented rotor features a coated hat finish and a floating disc mounting system for improved heat dissipation and durability.

• Cross-drilled and slotted surface for efficient heat and gas dissipation
• Vented rotor design to reduce brake fade under heavy use
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better thermal expansion management
• Compatible with 5-lug wheel setups on specified Mercedes-Benz models

Product Line Details: StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through advanced rotor surface technology. The combination of cross-drilled holes and precision slots improves water, dust, and gas evacuation from the rotor surface, which helps maintain consistent brake pad contact and reduces the risk of brake fade. This product line is tailored for drivers seeking reliable stopping power and rotor durability in demanding driving conditions.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 1.256 inches (31.9 mm) and a discard thickness of 1.157 inches (29.4 mm), ensuring a long service life before replacement is necessary. The rotor’s outside diameter measures 12.992 inches (330 mm), with an overall height of 2.138 inches (54.3 mm). It features a 5-lug hole pattern with a bolt circle diameter of 4.409 inches (112 mm) and stud/lug hole diameters of 0.602 inches (15.3 mm). The rotor weighs approximately 26.5 lbs (12.05 kg) and includes three miscellaneous holes and a straight vane style for optimized cooling. Note that this rotor does not include ABS tone rings or bearings.

Applications and Problem Solving

• Improves braking performance on Mercedes-Benz GL and ML series SUVs and R-Class models
• Reduces brake fade during aggressive or prolonged braking
• Minimizes rotor warping caused by excessive heat buildup
• Enhances pad bite and reduces brake dust accumulation
• Prevents corrosion with coated hat finish for longer rotor life

Installation Notes and Tips

• Ensure compatibility with your specific Mercedes-Benz model and verify part number 127.35089L before installation
• Inspect brake pads and calipers for wear and replace if necessary during rotor installation
• Follow manufacturer torque specifications for lug nuts and mounting bolts
• Perform a proper bed-in procedure after installation to optimize rotor and pad performance
• Check for any ABS sensor interference as this rotor does not include an ABS tone ring

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The 127.35089L rotor undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Consult your product documentation or supplier for exact warranty terms.