Oil circuit, as-built configuration - GF18.00-P-0800A

ENGINE 113.962 

Fig 1: Identifying Oil Supply Components

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Oil Circuit Diagram

Courtesy of MERCEDES-BENZ USA

Oil return flow check valve (a) 

Located in left side of crankcase between oil pan separation surface and oil pump.

Repair note 

When installing the oil pump, it is important to ensure that the oil return flow check valve (a) is pushed into the guide in the crankcase.

Fig 3: Identifying Oil Return Flow Check Valve

Courtesy of MERCEDES-BENZ USA