A graphite impeller within the vacuum pump may fail, leading to vehicle performance issues. Water ingress can sometimes affect these pumps, but over time, the impeller on the motor spindle may crack or break. A damaged impeller can result in reduced air pressure or vacuum, impairing the function of the PSE pump. It may also cause the motor to seize, potentially blowing the 20A fuse and causing the pump to shut down.Compatible with Bosch motor part number: 1397220291 Mercedes pump part numbers: A2308000648, A2308000548, A2308000448, A220800348, A2208000648, A2208000748, A2208000548, A2208000848, A2208001148, A2208001248, A2208000948Fitment: For Mercedes-Benz SL-Class (R230) 20012011 - 1st generation: 20012006 SL350, SL500, SL600, SL55 AMG, SL65 AMG - Facelift 1: 20062008 SL350, SL500, SL550, SL600, SL55 AMG, SL65 AMG - Facelift 2: 20082012 SL280, SL300, SL350, SL500, SL550, SL600, SL63 AMG, SL65 AMG For Mercedes-Benz S-Class (W220) 19982005 S280, S320 CDI, S320 CDI L, S350, S350 L, S400 CDI, S430, S430 L, S500, S500 L, S500 4-Matic, S600 L, S55 AMG, S55 AMG L For Mercedes-Benz CL-Class (C215) 19992006 CL500, CL600, CL55 AMG, CL63 AMG, CL65 AMG Material: ABS Color: Black Package Includes: 1 x Motor Impeller Note: The package includes only the items listed above. Other accessories are not included. Due to lighting effects and monitor settings, the color of the actual item may vary slightly from the image. Measurement may vary by 13 cm.