From Lufthansa Miles and More Senator
To Sixt Cards Platinum

Sent an email to sixtcard@sixt.com, asking for a status match for Platinum.

In the e-mail I sent the SIXT Card number, the Miles&More number, my full name and one image of the digital Senator card (I still haven't received the physical card). On the following morning I received a positive reply and when logging into the SIXT account I could already see the Platinum status.