I have never used a press to install a seal like this. The seal is mainly rubber, I'm not sure why you would even want to use a press. Watch the video I posted above.

VW's use the same type of seal and I was a VW tech for about 10 years, never once used a press or special tool to install a front or rear main seal. Pick and a small hammer.

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Current Bimmer
2004 X5 4.4i Sterling Grey Sport/Premium

Past Bimmers
1991 318I Alpine White
1995 740I Alpine White
1991 525I Schwartz
1998 323IS Scwartz
2004 330CI Cabrio Titanium Silver Metallic
1995 540I Schwartz
2000 Z4 3.0 Titanium Silver
2000 330ci Coupe Titanium Silver