A graphite impeller within the vacuum pump may fail, leading to vehicle performance issues. Water ingress can sometimes affect these pumps, but more commonly, the impeller on the motor spindle may break or deteriorate over time. A damaged impeller can result in reduced air pressure or vacuum, impairing the function of the PSE pump. It may also cause motor seizure, potentially leading to a blown 20A fuse and pump shutdown. Compatible with Bosch motor part number: 1397220291 pump part numbers: A2308000648, A2308000548, A2308000448, A220800348, A2208000648, A2208000748, A2208000548, A2208000848, A2208001148, A2208001248, A2208000948 Fitment: For - 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 - 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 - 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 and display differences, the actual color may vary slightly from the image. Size may vary by 13 cm due to measurement tolerance.