A graphite impeller within the vacuum pump may fail, potentially leading to vehicle performance issues. Water ingress can sometimes affect these pumps, and over time, the impeller on the motor spindle may break or shatter. A damaged impeller can result in reduced air pressure or vacuum, impairing the operation of the PSE pump. It may also cause the motor to jam, potentially leading to a blown 20A fuse and pump shutdown. 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 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 item may vary slightly from the images shown. Size measurements may have a tolerance of +/- 1–3 cm.