Mercedes-Benz CLS63 AMG plastic idler pulleys failure causing serpentine belt and water pump damage on Mercedes-Benz CLS63 AMG

Some Mercedes-Benz CLS63 AMG owners report experiencing issues with plastic idler pulleys failing, which can lead to serpentine belt damage and other complications. These failures may cause the serpentine belt to come off, resulting in difficulties with power steering, alternator charging, and air conditioning operation, often indicated by the battery warning light illuminating on the dashboard. Additionally, some owners have encountered problems where a seized idler pulley shreds the serpentine belt, potentially wrapping it around the crankshaft and causing further engine damage. It is important for owners to be vigilant for warning signs such as unusual noises and belt wear to prevent serious damage to the engine's drive system. Prompt attention to these issues is essential to maintain optimal performance and avoid costly repairs.