Remove/install oil filler pipe - AR27.10-P-0500-04A

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Unscrew bolts (62, 63, 64)
Release wiring harness from oil filler pipe (61)
Use a suitable tool to lever the oil filler tube (61) out of the housing bore of the transmission housing.
Installation: Replace O-ring on oil filler pipe (61).

Fig 1: Identifying Oil Filler Pipe And Bolts
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
1. Remove exhaust gas recirculation pipe (51) on exhaust manifold.
  Engine 606.964.
  
  The exhaust gas recirculation pipe (51) need only be removed in a case of total removal. The oil filler tube (61) is only swung to one side for work such as transmission removal.
2. Remove transverse exhaust pipe.
  Engines 112, 113 except engine 113.993.
Install in the reverse order.

Fig 2: Identifying Exhaust Gas Recirculation Pipe And Oil Filler Tube
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.