A graphite impeller within the vacuum pump may fail, leading to vehicle performance issues. Water ingress can sometimes affect these pumps, but often the impeller on the motor spindle may break or degrade over time. A damaged impeller can result in reduced air pressure or vacuum, impairing the operation of the PSE pump. This 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, A2208000948 Fitment: For Mercedes-Benz SL-Class (R230) 2001–2011 - 1st generation: 2001–2006 – SL350, SL500, SL600, SL55 AMG, SL65 AMG - Facelift 1: 2006–2008 – SL350, SL500, SL550, SL600, SL55 AMG, SL65 AMG - Facelift 2: 2008–2012 – SL280, SL300, SL350, SL500, SL550, SL600, SL63 AMG, SL65 AMG For Mercedes-Benz S-Class (W220) 1998–2005 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) 1999–2006 CL500, CL600, CL55 AMG, CL63 AMG, CL65 AMG Material: ABS Color: Black Package Contents: 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 actual color of the item may vary slightly from the image. Measurement tolerance: ±1–3 cm.