This video shows you how to replace your secondary air pump on Mercedes M272 V6 engines. The process is similar for M273 V8 engines. If you experience a loud wail upon cold startup, sluggish initial performance and/or belt squeal, the culprit is likely the secondary air pump. A new OE pump can be purchased from FCP Euro, or knockoff ones from Amazon:
OEM Bosch Pump: [ Ссылка ]
Amazon clone pump, purchase at your own risk: [ Ссылка ]
