O-ring sizes

http://www.peachparts.com/shopforum/diesel-discussion/177588-om606-962-o-ring-size.html

The OM606.962 uses:

1 shutoff valve 2.5mm x 12mm ID
9 fuel line 2.5mm x 8mm ID (1 located at fuel filter housing)
3 fuel filter housing 2.5mm x 10mm ID
1 pre-filter 3mm x 18mm ID

delivery valve 2mm or 2.5mm x 15mm

the O-ring around the in-tank fuel screen/filter thingie measures 3 mm Width, 35 mm ID, 41 mm OD. (3mm x 35mm ID)