Connection diagram of intake manifold - AR09.20-P-1310-01F

Engine 120.980/981 

Function diagram of secondary air injection and exhaust gas recirculation Model 140 up to 06/91 base and national version (except  )

Fig 1: Function Diagram Of Secondary Air Injection And Exhaust Gas Recirculation

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function diagram of secondary air injection and exhaust gas recirculation Model 140 as of 06/91, Model 129 as of 09/92 base and national version (except  )

Fig 2: Function Diagram Of Secondary Air Injection And Exhaust Gas Recirculation Model 140 As Of 06/91

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function diagram of air injection and exhaust gas recirculation as well as vacuum supply model year 1992 

Fig 3: Function Diagram Of Air Injection And Exhaust Gas Recirculation As Well As Vacuum Supply

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function diagram of secondary air injection and exhaust gas recirculation as well as vacuum supply model year 1993 

Fig 4: Function Diagram Of Secondary Air Injection Vacuum Supply - Model Year 1993

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.