I played the Marder II many versions of WOTB ago, and never fully upgraded it. Sold the vehicle, and recently bought it again. I have fully upgraded the Pz.Jag I and Hetzer (tiers above and below) and researched all modules currently available for the Marder II.
But my Marder II does not show elite status with the wreath around the TD triangle.
The 5cm gun was removed in v1.5, but now that I cannot research that module, my Marder II cannot get elite status.