engine vacuum pump removed from a 2013–2016 Mercedes-Benz GL450 (X166 chassis) equipped with the M278 4.7L V8 twin-turbo engine. Pump is in good used condition with no cracks, broken ports, or damaged fittings. All mounting points and hose connections are intact, and the unit was removed from a running engine. This part fits various Mercedes models that use the M278 V8, but verify compatibility with your VIN before purchase. Ideal replacement for a leaking or weak vacuum pump.