Filter 'O' rings

[Laters]

Do genuine Mercedes service parts (filters) come with the relevant O rings or should I order them separately?
I am going to order a diesel filter & pre-filter from the Mercedes Benz Parts site.
If the filters dont come with the 'O' rings I would rather order them at the same time then there is no waiting for another parts order to arrive.

 

[bolide]

The diesel filter comes with an O-ring and the pre-filter doesn't need one. On a W124

Nick Froome
www.w124.co.uk