Preparation For Test (Section 22)

Turn ignition OFF.
Remove diagnostic module (OBD II, N59/1). On model 140 as of Model Year 1996 remove rear seat cushion and loosen bracket for diagnostic module.
Connect socket box with test cable according to connecting diagram. See Fig 1-Fig 5 .

Fig 1: Identifying Special Tools

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Connecting Socket Box To Control Module (Model 129 As Of Model Year 1996)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Connecting Socket Box To Control Module (Model 140 To End Of Model Year 1995)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Connecting Socket Box To Control Module (Model 140 As Of Model Year 1996)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 5: Connecting Socket Box To Control Module (Model 210)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.