Component description for the air pump relay - GF14.30-P-2010V

ENGINE 272.920 in MODEL 203 up to Model Year 8

ENGINE 272.922 in MODEL 211

ENGINE 272.940 in MODEL 203 up to Model Year 8

ENGINE 272.941 in MODEL 203 up to Model Year 8

ENGINE 272.942 in MODEL 171 up to Model Year 8

ENGINE 272.943 in MODEL 211, 219

ENGINE 272.944 in MODEL 211

ENGINE 272.945 in MODEL 251 up to Model Year 8

ENGINE 272.946 in MODEL 221 up to Model Year 8

ENGINE 272.960 in MODEL 203 up to Model Year 8

ENGINE 272.963 in MODEL 171 up to Model Year 8

ENGINE 272.964 in MODEL 211, 219

ENGINE 272.965 in MODEL 221 up to Model Year 8

ENGINE 272.966 in MODEL 230 up to Model Year 8

ENGINE 272.967 in MODEL 164, 251 up to Model Year 8

ENGINE 272.970 in MODEL 203 up to Model Year 8

ENGINE 272.972 in MODEL 211

ENGINE 272.975 in MODEL 221 up to Model Year 8

ENGINE 273.922 in MODEL 221 up to Model Year 8

ENGINE 273.923 in MODEL 164 up to Model Year 8

ENGINE 273.924 in MODEL 221 up to Model Year 8

ENGINE 273.960 in MODEL 211, 219

ENGINE 273.961 in MODEL 216, 221 up to Model Year 8

ENGINE 273.962 in MODEL 211

ENGINE 273.963 in MODEL 164, 251 up to Model Year 8

ENGINE 273.965 in MODEL 230 up to Model Year 8

ENGINE 273.967 in MODEL 209

ENGINE 273.968 in MODEL 221 up to Model Year 8

ENGINE 272.940 in MODEL 209

ENGINE 272.960 in MODEL 209

Shown on engine 272.963 in model 171

Fig 1: Identifying Air Pump Relay - Shown On Engine 272.963 In Model 171

Courtesy of MERCEDES-BENZ USA

Location

Model 203, 209, 221: in the front SAM control unit with fuse and relay module
Models 171, 211, 219: in driver-side SAM control unit with fuse and relay module
Model 230: fuse and relay module for the front passenger
Model 164, 251: In the engine compartment fuse and relay box.

Shown on model 211, 219

Fig 2: Identifying Driver-Side SAM Control Unit With Fuse and Relay Module - Shown On Model 211, 219

Courtesy of MERCEDES-BENZ USA

Task

Actuates electrical air pump and air pump switchover valve.

Design

Vehicle specific relay with flat plug contacts and a closing contact.

Function

The secondary air injection relay is operated by the ME-SFI control unit through an output stage by means of a GND signal. The voltage is supplied through circuit 87.