Haven't tried it - but looks like MB sells the seals (items 8 and 20 in attached image) for rebuild - atleast for the M103 engine and the rebuild instructions are in the shop manual. See attachments.

Attached Thumbnails

   

Attached Files

20-2250.pdf (77.9 KB, 248 views)

__________________
1986 300E (3/2002) Rear ended and totaled (10/2009)
2000 Xterra (5/2000)
1992 400E (11/2009) -Sold
1986 300E (12/2009) - Sold
2004 E500 Wagon (6/2013) - Sold