A graphite impeller within the vacuum pump may fail, leading to vehicle performance issues. Water ingress can sometimes affect these pumps, but in many cases, the impeller on the motor spindle may crack or break over time. A damaged impeller can result in reduced air pressure or vacuum, impairing the pump's operation. It may also cause the motor to seize, potentially blowing the 20A fuse and causing the pump to shut down. Compatible with motor part number: 1397220291 Pump part numbers: A2308000648, A2308000548, A2308000448, A220800348, A2208000648, A2208000748, A2208000548, A2208000848, A2208001148, A2208001248, A2208000948 Fitment: For SL-Class (R230) 2001–2011 - 1st generation: 2001–2006 – SL350, SL500, SL600, SL55AMG, SL65AMG - Facelift 1: 2006–2008 – SL350, SL500, SL550, SL600, SL55AMG, SL65AMG - Facelift 2: 2008–2012 – SL280, SL300, SL350, SL500, SL550, SL600, SL63AMG, SL65AMG For S-Class (W220) 1998–2005 S280, S320CDI, S320CDI L, S350, S350 L, S400CDI, S430, S430 L, S500, S500L, S500 4-, S600L, S55, S55 L For CL-Class (C215) 1999–2006 CL500, CL600, CL55AMG, CL63AMG, CL65AMG Material: ABS Color: Black Package Contents: 1 x Motor Impeller Note: The package includes only the items listed above. Other products are not included. Due to lighting effects and monitor settings, the color of the item may vary slightly from the images shown. Measurement may vary by up to 1–3 cm.