There are some precausions when doing this for the first time. The pump will have to come off and apart. Taking it off is not easy, but we do it often. You will have to take out the stator and veins to get the front seal out. IF you do this, you must put them back in the same direction to avoid damage. Mark everything as you take it apart. If you don't, well.... Just mark it.
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM
OWNER OF MB AUTOWERKS .COM