Removing Drive Head

Unscrew screws -arrows- .

Fig 1: Locating Screws On Drive Head
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
To avoid loosening the bearing cover -1- and having to seal it again, do not remove the drive head -2- using a hammer but only using expanding pliers -arrows- as shown below.

Fig 2: Removing Drive Head From Bearing Cover
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Carefully press the drive head off the bearing cover and remove it.
Remove decoupling spring.
Using Used Oil Collection And Extraction Unit VAG 1782 WE 1385 , extract all the oil for the compressor drive from the bearing cover and from oil pockets -arrows- between the ribs.

Fig 3: Identifying Oil In Bearing Cover
Courtesy of PORSCHE CARS NORTH AMERICA, INC.