300E 4MATIC (124.230) L6-3.0L (103.985) (1990)
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2
Loosen four hex. socket screws for fastening pump to cylinder crankcase or cylinder head, pull out pump and remove.
Attention!
Never release the two hex. socket screws for fastening cover to pump housing, since otherwise pump may start leaking.
Distinguishing mark of screws: The hex. socket screws for cover are provided with continuous threads visible between cover and housing.
Engine 103
3
Unscrew wing nut or vent cap (35g) from pump housing and remove closing cap.
4
Unscrew hex. nut, remove plastic sleeve from stud.
