001-017-73-52 is an internal part of the injector (Part 137 on Figure 1)

601-017-00-60 is the heatshield (Part 146 on Figure 1)

606-016-02-21 is the o-ring (Part 23 on Figure 2)

Attached Thumbnails

   

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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022