Serpentine Belt Tensioner and Idler Pulley Kit FIT 2005-2011 Mercedes-Benz C300 C350 E350 ML350 S550 M272 M273 6PK2404 1-Set

Vehicle Compatibility Matrix (M272 V6 & M273 V8 Engines ONLY): FIT 2006-2011 Mercedes-Benz C230 / C280 / C300 / C350 FIT 2006-2011 Mercedes-Benz E350 / CLK350 / GLK350 FIT 2007-2011 Mercedes-Benz S550 / SL550 / CL550 FIT 2007-2011 Mercedes-Benz GL450 / GL550 / ML350 / ML550 FIT 2006-2011 Mercedes-Benz SLK280 / SLK300 / SLK350 Note: Not compatible with M271 4-cylinder or AMG high-performance M156 engines. Technical Specifications & Physical Evidence: Belt Type: 6PK2404 (6-Rib, 2404mm Effective Length) Belt Material: High-Density EPDM (Heat & Glaze Resistant) Bearing Type: Precision Double-Row Sealed Steel Bearings OE Part Interchange: 2722000270, 2722021419, 2722021019, 0019931896, 6PK2404. Technical Installation & Drive Geometry Maintenance: This serpentine drive kit is a critical hardware assembly for maintaining engine accessory geometry. Before integration, ensure all accessory pulleys (Alternator, Water Pump, AC) are free of debris and rotate without binding. The tensioner must be fully seated against the engine block to maintain signal integrity and belt alignment. Improper belt routing or misaligned pulleys can lead to premature hardware failure. This kit provides a direct-fit solution for factory-specified belt tension and feedback.

• FIT 2006-2011 Mercedes-Benz C230, C300, C350, FIT 2006-2011 E350, FIT 2007-2011 S550, GL450, ML350, ML550, FIT 2006-2011 SLK280, SLK350. Specifically engineered for the M272 V6 and M273 V8 engine platforms. Verify your engine code before purchase.
• This accessory drive refresh kit integrates one Automatic Belt Tensioner, two precision-aligned Idler Pulleys, and one 6PK2404 EPDM Serpentine Belt (2404mm length). Each pulley features double-row sealed bearings to maintain a closed-loop mechanical feedback system for the alternator and AC compressor.
• The EPDM belt is engineered for thermal expansion stability between -40°C and 120°C, addressing excessive belt slack and signal lag in the accessory drive loop. This hardware restores factory-specified belt tracking characteristics and maintains proper engine-to-accessory geometry under dynamic RPM cycles.
• The tensioner housing is constructed from A356-T6 aluminum and undergoes cycles tested validation for spring-force consistency. Each component is precision-balanced to maintain factory handling characteristics and meet OE specifications for acoustic decibel limits across the operating RPM range.
• Professional installation is required; follow the factory serpentine routing diagram. Ensure all pulley mounting bolts are torqued to OE specifications to prevent axial misalignment. Replaces OE# 2722000270, 2722021419, 2722021019, 0019931896. Matches 6PK2404 belt geometry.